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Combining & Breaking Down Substances STUDY GUIDE
Word bank:
Synthesis Reaction Decomposition Reaction Ion
Replacement Reaction Combustion Reaction Catalyst
Solution Solute Solvent
Temperature
Vocabulary words
1. A substance that gains or looses electrons.
2. This weakens the bonds holding a substance together.
3. A mixture that forms when a substance dissolves in a liquid and forms a
homogeneous mixture.
4. If you increase this during a chemical reaction, the reaction rate will also increase.
5. The substance that dissolves in a liquid.
6. The liquid that has a substance dissolve in it.
7. A reaction in which a substance reacts rapidly with oxygen, which often produces
heat and light.
8. A reaction in which two or more substances react to form a single substance.
9. A reaction in which a compound breaks down into two or more simpler substances.
10. A reaction in which one or more elements take the place of one or more elements
in a compound, resulting in a new compound.
Electron Configuration & Electron Dot Diagrams:
Complete the following substances electron configuration and electron dot diagram.
35. Calcium (Ca)
36. Arsenic (As)
Match the reaction type with the chemical reactions below.
Synthesis Reaction, Decomposition, Replacement, or Combustion Reaction 31. 2H2O � 2H2 + O2
32. Mg + 2HCl � MgCl2 + H2
33. Na + Cl � NaCl
34. CH4 + 2O2 � CO2 + 2H2O + heat & light
Match the correct compound or mixture below.
Ionic Bond, Covalent Bond, Heterogeneous, or Homogeneous
21. Carbon Dioxide (CO2)
22. Table Salt (NaCl)
23. Salt Water
24. Lemonade
25. Sugar (C6O6H12)
26. Cookie Dough Ice Cream
27. Magnesium Chloride (MgCl2)
28. Silver Nitrate (AgNO3)
29. Air
30. Methane (CH4)
True & False:
11. A compound can be broken down by physical means.
12. The two types of mixtures are homogeneous and heterogeneous.
13. You can see the different components in a homogeneous mixture.
14. Chocolate Chip Cookie Dough Ice Cream is an example of a heterogeneous
mixture.
15. Physical Bonds hold atoms and ions together.
16. A chemical formula shows the elements in a compound and the ratio of the atoms
in the compound.
17. A substance held together by a covalent bond has a high melting point.
18. A substance that is held together by an ionic bond will be solid.
19. If you increase the surface are of a substance reacting it will increase the reaction
rate.
20. Stirring will not affect the reaction rate during a chemical reaction.
Short Answer: Use the following reading to answer the question:
Most chemical reactions speed up when temperature increases. This is because
atoms and molecules are always in motion, and they move faster at higher
temperatures. Faster molecules collide with each other more often and with greater
energy than slower molecules do, so collisions are more likely to provide enough
energy to break the old bonds. This is the activation energy.
The high temperature inside an oven speeds up the chemical reactions that turn
a liquid cake batter into a more solid, spongy cake. This works the other way, too.
Lowering the temperature slows down most reactions. If you set the oven temperature
too low, your cake will not bake properly.
*Using the information above, explain why we use refrigerators to preserve food? Be
sure to use two specific examples from the text.
Combining & Breaking Down Substances STUDY GUIDE
Word bank:
Synthesis Reaction Decomposition Reaction Ion
Replacement Reaction Combustion Reaction Catalyst
Solution Solute Solvent
Temperature
Vocabulary words
1. A substance that gains or looses electrons.
2. This weakens the bonds holding a substance together.
3. A mixture that forms when a substance dissolves in a liquid and forms a
homogeneous mixture.
4. If you increase this during a chemical reaction, the reaction rate will also increase.
5. The substance that dissolves in a liquid.
6. The liquid that has a substance dissolve in it.
7. A reaction in which a substance reacts rapidly with oxygen, which often produces
heat and light.
8. A reaction in which two or more substances react to form a single substance.
9. A reaction in which a compound breaks down into two or more simpler substances.
10. A reaction in which one or more elements take the place of one or more elements
in a compound, resulting in a new compound.
Electron Configuration & Electron Dot Diagrams:
Complete the following substances electron configuration and electron dot diagram.
35. Calcium (Ca)
36. Arsenic (As)
Match the reaction type with the chemical reactions below.
Synthesis Reaction, Decomposition, Replacement, or Combustion Reaction 31. 2H2O � 2H2 + O2
32. Mg + 2HCl � MgCl2 + H2
33. Na + Cl � NaCl
34. CH4 + 2O2 � CO2 + 2H2O + heat & light
Match the correct compound or mixture below.
Ionic Bond, Covalent Bond, Heterogeneous, or Homogeneous
21. Carbon Dioxide (CO2)
22. Table Salt (NaCl)
23. Salt Water
24. Lemonade
25. Sugar (C6O6H12)
26. Cookie Dough Ice Cream
27. Magnesium Chloride (MgCl2)
28. Silver Nitrate (AgNO3)
29. Air
30. Methane (CH4)
True & False:
11. A compound can be broken down by physical means.
12. The two types of mixtures are homogeneous and heterogeneous.
13. You can see the different components in a homogeneous mixture.
14. Chocolate Chip Cookie Dough Ice Cream is an example of a heterogeneous
mixture.
15. Physical Bonds hold atoms and ions together.
16. A chemical formula shows the elements in a compound and the ratio of the atoms
in the compound.
17. A substance held together by a covalent bond has a high melting point.
18. A substance that is held together by an ionic bond will be solid.
19. If you increase the surface are of a substance reacting it will increase the reaction
rate.
20. Stirring will not affect the reaction rate during a chemical reaction.
Short Answer: Use the following reading to answer the question:
Most chemical reactions speed up when temperature increases. This is because
atoms and molecules are always in motion, and they move faster at higher
temperatures. Faster molecules collide with each other more often and with greater
energy than slower molecules do, so collisions are more likely to provide enough
energy to break the old bonds. This is the activation energy.
The high temperature inside an oven speeds up the chemical reactions that turn
a liquid cake batter into a more solid, spongy cake. This works the other way, too.
Lowering the temperature slows down most reactions. If you set the oven temperature
too low, your cake will not bake properly.
*Using the information above, explain why we use refrigerators to preserve food? Be
sure to use two specific examples from the text.
Combining & Breaking Down Substances STUDY GUIDE
Word bank:
Synthesis Reaction Decomposition Reaction Ion
Replacement Reaction Combustion Reaction Catalyst
Solution Solute Solvent
Temperature
Vocabulary words
1. A substance that gains or looses electrons.
2. This weakens the bonds holding a substance together.
3. A mixture that forms when a substance dissolves in a liquid and forms a
homogeneous mixture.
4. If you increase this during a chemical reaction, the reaction rate will also increase.
5. The substance that dissolves in a liquid.
6. The liquid that has a substance dissolve in it.
7. A reaction in which a substance reacts rapidly with oxygen, which often produces
heat and light.
8. A reaction in which two or more substances react to form a single substance.
9. A reaction in which a compound breaks down into two or more simpler substances.
10. A reaction in which one or more elements take the place of one or more elements
in a compound, resulting in a new compound.
Electron Configuration & Electron Dot Diagrams:
Complete the following substances electron configuration and electron dot diagram.
35. Calcium (Ca)
36. Arsenic (As)
Match the reaction type with the chemical reactions below.
Synthesis Reaction, Decomposition, Replacement, or Combustion Reaction 31. 2H2O � 2H2 + O2
32. Mg + 2HCl � MgCl2 + H2
33. Na + Cl � NaCl
34. CH4 + 2O2 � CO2 + 2H2O + heat & light
Match the correct compound or mixture below.
Ionic Bond, Covalent Bond, Heterogeneous, or Homogeneous
21. Carbon Dioxide (CO2)
22. Table Salt (NaCl)
23. Salt Water
24. Lemonade
25. Sugar (C6O6H12)
26. Cookie Dough Ice Cream
27. Magnesium Chloride (MgCl2)
28. Silver Nitrate (AgNO3)
29. Air
30. Methane (CH4)
True & False:
11. A compound can be broken down by physical means.
12. The two types of mixtures are homogeneous and heterogeneous.
13. You can see the different components in a homogeneous mixture.
14. Chocolate Chip Cookie Dough Ice Cream is an example of a heterogeneous
mixture.
15. Physical Bonds hold atoms and ions together.
16. A chemical formula shows the elements in a compound and the ratio of the atoms
in the compound.
17. A substance held together by a covalent bond has a high melting point.
18. A substance that is held together by an ionic bond will be solid.
19. If you increase the surface are of a substance reacting it will increase the reaction
rate.
20. Stirring will not affect the reaction rate during a chemical reaction.
Short Answer: Use the following reading to answer the question:
Most chemical reactions speed up when temperature increases. This is because
atoms and molecules are always in motion, and they move faster at higher
temperatures. Faster molecules collide with each other more often and with greater
energy than slower molecules do, so collisions are more likely to provide enough
energy to break the old bonds. This is the activation energy.
The high temperature inside an oven speeds up the chemical reactions that turn
a liquid cake batter into a more solid, spongy cake. This works the other way, too.
Lowering the temperature slows down most reactions. If you set the oven temperature
too low, your cake will not bake properly.
*Using the information above, explain why we use refrigerators to preserve food? Be
sure to use two specific examples from the text.
Combining & Breaking Down Substances STUDY GUIDE
Word bank:
Synthesis Reaction Decomposition Reaction Ion
Replacement Reaction Combustion Reaction Catalyst
Solution Solute Solvent
Temperature
Vocabulary words
1. A substance that gains or looses electrons.
2. This weakens the bonds holding a substance together.
3. A mixture that forms when a substance dissolves in a liquid and forms a
homogeneous mixture.
4. If you increase this during a chemical reaction, the reaction rate will also increase.
5. The substance that dissolves in a liquid.
6. The liquid that has a substance dissolve in it.
7. A reaction in which a substance reacts rapidly with oxygen, which often produces
heat and light.
8. A reaction in which two or more substances react to form a single substance.
9. A reaction in which a compound breaks down into two or more simpler substances.
10. A reaction in which one or more elements take the place of one or more elements
in a compound, resulting in a new compound.
Electron Configuration & Electron Dot Diagrams:
Complete the following substances electron configuration and electron dot diagram.
35. Calcium (Ca)
36. Arsenic (As)
Match the reaction type with the chemical reactions below.
Synthesis Reaction, Decomposition, Replacement, or Combustion Reaction 31. 2H2O � 2H2 + O2
32. Mg + 2HCl � MgCl2 + H2
33. Na + Cl � NaCl
34. CH4 + 2O2 � CO2 + 2H2O + heat & light
Match the correct compound or mixture below.
Ionic Bond, Covalent Bond, Heterogeneous, or Homogeneous
21. Carbon Dioxide (CO2)
22. Table Salt (NaCl)
23. Salt Water
24. Lemonade
25. Sugar (C6O6H12)
26. Cookie Dough Ice Cream
27. Magnesium Chloride (MgCl2)
28. Silver Nitrate (AgNO3)
29. Air
30. Methane (CH4)
True & False:
11. A compound can be broken down by physical means.
12. The two types of mixtures are homogeneous and heterogeneous.
13. You can see the different components in a homogeneous mixture.
14. Chocolate Chip Cookie Dough Ice Cream is an example of a heterogeneous
mixture.
15. Physical Bonds hold atoms and ions together.
16. A chemical formula shows the elements in a compound and the ratio of the atoms
in the compound.
17. A substance held together by a covalent bond has a high melting point.
18. A substance that is held together by an ionic bond will be solid.
19. If you increase the surface are of a substance reacting it will increase the reaction
rate.
20. Stirring will not affect the reaction rate during a chemical reaction.
Short Answer: Use the following reading to answer the question:
Most chemical reactions speed up when temperature increases. This is because
atoms and molecules are always in motion, and they move faster at higher
temperatures. Faster molecules collide with each other more often and with greater
energy than slower molecules do, so collisions are more likely to provide enough
energy to break the old bonds. This is the activation energy.
The high temperature inside an oven speeds up the chemical reactions that turn
a liquid cake batter into a more solid, spongy cake. This works the other way, too.
Lowering the temperature slows down most reactions. If you set the oven temperature
too low, your cake will not bake properly.
*Using the information above, explain why we use refrigerators to preserve food? Be
sure to use two specific examples from the text.
Combining & Breaking Down Substances STUDY GUIDE
Word bank:
Synthesis Reaction Decomposition Reaction Ion
Replacement Reaction Combustion Reaction Catalyst
Solution Solute Solvent
Temperature
Vocabulary words
1. A substance that gains or looses electrons.
2. This weakens the bonds holding a substance together.
3. A mixture that forms when a substance dissolves in a liquid and forms a
homogeneous mixture.
4. If you increase this during a chemical reaction, the reaction rate will also increase.
5. The substance that dissolves in a liquid.
6. The liquid that has a substance dissolve in it.
7. A reaction in which a substance reacts rapidly with oxygen, which often produces
heat and light.
8. A reaction in which two or more substances react to form a single substance.
9. A reaction in which a compound breaks down into two or more simpler substances.
10. A reaction in which one or more elements take the place of one or more elements
in a compound, resulting in a new compound.
Electron Configuration & Electron Dot Diagrams:
Complete the following substances electron configuration and electron dot diagram.
35. Calcium (Ca)
36. Arsenic (As)
Match the reaction type with the chemical reactions below.
Synthesis Reaction, Decomposition, Replacement, or Combustion Reaction 31. 2H2O � 2H2 + O2
32. Mg + 2HCl � MgCl2 + H2
33. Na + Cl � NaCl
34. CH4 + 2O2 � CO2 + 2H2O + heat & light
Match the correct compound or mixture below.
Ionic Bond, Covalent Bond, Heterogeneous, or Homogeneous
21. Carbon Dioxide (CO2)
22. Table Salt (NaCl)
23. Salt Water
24. Lemonade
25. Sugar (C6O6H12)
26. Cookie Dough Ice Cream
27. Magnesium Chloride (MgCl2)
28. Silver Nitrate (AgNO3)
29. Air
30. Methane (CH4)
True & False:
11. A compound can be broken down by physical means.
12. The two types of mixtures are homogeneous and heterogeneous.
13. You can see the different components in a homogeneous mixture.
14. Chocolate Chip Cookie Dough Ice Cream is an example of a heterogeneous
mixture.
15. Physical Bonds hold atoms and ions together.
16. A chemical formula shows the elements in a compound and the ratio of the atoms
in the compound.
17. A substance held together by a covalent bond has a high melting point.
18. A substance that is held together by an ionic bond will be solid.
19. If you increase the surface are of a substance reacting it will increase the reaction
rate.
20. Stirring will not affect the reaction rate during a chemical reaction.
Short Answer: Use the following reading to answer the question:
Most chemical reactions speed up when temperature increases. This is because
atoms and molecules are always in motion, and they move faster at higher
temperatures. Faster molecules collide with each other more often and with greater
energy than slower molecules do, so collisions are more likely to provide enough
energy to break the old bonds. This is the activation energy.
The high temperature inside an oven speeds up the chemical reactions that turn
a liquid cake batter into a more solid, spongy cake. This works the other way, too.
Lowering the temperature slows down most reactions. If you set the oven temperature
too low, your cake will not bake properly.
*Using the information above, explain why we use refrigerators to preserve food? Be
sure to use two specific examples from the text.
Combining & Breaking Down Substances STUDY GUIDE
Word bank:
Synthesis Reaction Decomposition Reaction Ion
Replacement Reaction Combustion Reaction Catalyst
Solution Solute Solvent
Temperature
Vocabulary words
1. A substance that gains or looses electrons.
2. This weakens the bonds holding a substance together.
3. A mixture that forms when a substance dissolves in a liquid and forms a
homogeneous mixture.
4. If you increase this during a chemical reaction, the reaction rate will also increase.
5. The substance that dissolves in a liquid.
6. The liquid that has a substance dissolve in it.
7. A reaction in which a substance reacts rapidly with oxygen, which often produces
heat and light.
8. A reaction in which two or more substances react to form a single substance.
9. A reaction in which a compound breaks down into two or more simpler substances.
10. A reaction in which one or more elements take the place of one or more elements
in a compound, resulting in a new compound.
Electron Configuration & Electron Dot Diagrams:
Complete the following substances electron configuration and electron dot diagram.
35. Calcium (Ca)
36. Arsenic (As)
Match the reaction type with the chemical reactions below.
Synthesis Reaction, Decomposition, Replacement, or Combustion Reaction 31. 2H2O � 2H2 + O2
32. Mg + 2HCl � MgCl2 + H2
33. Na + Cl � NaCl
34. CH4 + 2O2 � CO2 + 2H2O + heat & light
Match the correct compound or mixture below.
Ionic Bond, Covalent Bond, Heterogeneous, or Homogeneous
21. Carbon Dioxide (CO2)
22. Table Salt (NaCl)
23. Salt Water
24. Lemonade
25. Sugar (C6O6H12)
26. Cookie Dough Ice Cream
27. Magnesium Chloride (MgCl2)
28. Silver Nitrate (AgNO3)
29. Air
30. Methane (CH4)
True & False:
11. A compound can be broken down by physical means.
12. The two types of mixtures are homogeneous and heterogeneous.
13. You can see the different components in a homogeneous mixture.
14. Chocolate Chip Cookie Dough Ice Cream is an example of a heterogeneous
mixture.
15. Physical Bonds hold atoms and ions together.
16. A chemical formula shows the elements in a compound and the ratio of the atoms
in the compound.
17. A substance held together by a covalent bond has a high melting point.
18. A substance that is held together by an ionic bond will be solid.
19. If you increase the surface are of a substance reacting it will increase the reaction
rate.
20. Stirring will not affect the reaction rate during a chemical reaction.
Short Answer: Use the following reading to answer the question:
Most chemical reactions speed up when temperature increases. This is because
atoms and molecules are always in motion, and they move faster at higher
temperatures. Faster molecules collide with each other more often and with greater
energy than slower molecules do, so collisions are more likely to provide enough
energy to break the old bonds. This is the activation energy.
The high temperature inside an oven speeds up the chemical reactions that turn
a liquid cake batter into a more solid, spongy cake. This works the other way, too.
Lowering the temperature slows down most reactions. If you set the oven temperature
too low, your cake will not bake properly.
*Using the information above, explain why we use refrigerators to preserve food? Be
sure to use two specific examples from the text.
Combining & Breaking Down Substances STUDY GUIDE
Word bank:
Synthesis Reaction Decomposition Reaction Ion
Replacement Reaction Combustion Reaction Catalyst
Solution Solute Solvent
Temperature
Vocabulary words
1. A substance that gains or looses electrons.
2. This weakens the bonds holding a substance together.
3. A mixture that forms when a substance dissolves in a liquid and forms a
homogeneous mixture.
4. If you increase this during a chemical reaction, the reaction rate will also increase.
5. The substance that dissolves in a liquid.
6. The liquid that has a substance dissolve in it.
7. A reaction in which a substance reacts rapidly with oxygen, which often produces
heat and light.
8. A reaction in which two or more substances react to form a single substance.
9. A reaction in which a compound breaks down into two or more simpler substances.
10. A reaction in which one or more elements take the place of one or more elements
in a compound, resulting in a new compound.
Electron Configuration & Electron Dot Diagrams:
Complete the following substances electron configuration and electron dot diagram.
35. Calcium (Ca)
36. Arsenic (As)
Match the reaction type with the chemical reactions below.
Synthesis Reaction, Decomposition, Replacement, or Combustion Reaction 31. 2H2O � 2H2 + O2
32. Mg + 2HCl � MgCl2 + H2
33. Na + Cl � NaCl
34. CH4 + 2O2 � CO2 + 2H2O + heat & light
Match the correct compound or mixture below.
Ionic Bond, Covalent Bond, Heterogeneous, or Homogeneous
21. Carbon Dioxide (CO2)
22. Table Salt (NaCl)
23. Salt Water
24. Lemonade
25. Sugar (C6O6H12)
26. Cookie Dough Ice Cream
27. Magnesium Chloride (MgCl2)
28. Silver Nitrate (AgNO3)
29. Air
30. Methane (CH4)
True & False:
11. A compound can be broken down by physical means.
12. The two types of mixtures are homogeneous and heterogeneous.
13. You can see the different components in a homogeneous mixture.
14. Chocolate Chip Cookie Dough Ice Cream is an example of a heterogeneous
mixture.
15. Physical Bonds hold atoms and ions together.
16. A chemical formula shows the elements in a compound and the ratio of the atoms
in the compound.
17. A substance held together by a covalent bond has a high melting point.
18. A substance that is held together by an ionic bond will be solid.
19. If you increase the surface are of a substance reacting it will increase the reaction
rate.
20. Stirring will not affect the reaction rate during a chemical reaction.
Short Answer: Use the following reading to answer the question:
Most chemical reactions speed up when temperature increases. This is because
atoms and molecules are always in motion, and they move faster at higher
temperatures. Faster molecules collide with each other more often and with greater
energy than slower molecules do, so collisions are more likely to provide enough
energy to break the old bonds. This is the activation energy.
The high temperature inside an oven speeds up the chemical reactions that turn
a liquid cake batter into a more solid, spongy cake. This works the other way, too.
Lowering the temperature slows down most reactions. If you set the oven temperature
too low, your cake will not bake properly.
*Using the information above, explain why we use refrigerators to preserve food? Be
sure to use two specific examples from the text.
Combining & Breaking Down Substances STUDY GUIDE
Word bank:
Synthesis Reaction Decomposition Reaction Ion
Replacement Reaction Combustion Reaction Catalyst
Solution Solute Solvent
Temperature
Vocabulary words
1. A substance that gains or looses electrons.
2. This weakens the bonds holding a substance together.
3. A mixture that forms when a substance dissolves in a liquid and forms a
homogeneous mixture.
4. If you increase this during a chemical reaction, the reaction rate will also increase.
5. The substance that dissolves in a liquid.
6. The liquid that has a substance dissolve in it.
7. A reaction in which a substance reacts rapidly with oxygen, which often produces
heat and light.
8. A reaction in which two or more substances react to form a single substance.
9. A reaction in which a compound breaks down into two or more simpler substances.
10. A reaction in which one or more elements take the place of one or more elements
in a compound, resulting in a new compound.
Electron Configuration & Electron Dot Diagrams:
Complete the following substances electron configuration and electron dot diagram.
35. Calcium (Ca)
36. Arsenic (As)
Match the reaction type with the chemical reactions below.
Synthesis Reaction, Decomposition, Replacement, or Combustion Reaction 31. 2H2O � 2H2 + O2
32. Mg + 2HCl � MgCl2 + H2
33. Na + Cl � NaCl
34. CH4 + 2O2 � CO2 + 2H2O + heat & light
Match the correct compound or mixture below.
Ionic Bond, Covalent Bond, Heterogeneous, or Homogeneous
21. Carbon Dioxide (CO2)
22. Table Salt (NaCl)
23. Salt Water
24. Lemonade
25. Sugar (C6O6H12)
26. Cookie Dough Ice Cream
27. Magnesium Chloride (MgCl2)
28. Silver Nitrate (AgNO3)
29. Air
30. Methane (CH4)
True & False:
11. A compound can be broken down by physical means.
12. The two types of mixtures are homogeneous and heterogeneous.
13. You can see the different components in a homogeneous mixture.
14. Chocolate Chip Cookie Dough Ice Cream is an example of a heterogeneous
mixture.
15. Physical Bonds hold atoms and ions together.
16. A chemical formula shows the elements in a compound and the ratio of the atoms
in the compound.
17. A substance held together by a covalent bond has a high melting point.
18. A substance that is held together by an ionic bond will be solid.
19. If you increase the surface are of a substance reacting it will increase the reaction
rate.
20. Stirring will not affect the reaction rate during a chemical reaction.
Short Answer: Use the following reading to answer the question:
Most chemical reactions speed up when temperature increases. This is because
atoms and molecules are always in motion, and they move faster at higher
temperatures. Faster molecules collide with each other more often and with greater
energy than slower molecules do, so collisions are more likely to provide enough
energy to break the old bonds. This is the activation energy.
The high temperature inside an oven speeds up the chemical reactions that turn
a liquid cake batter into a more solid, spongy cake. This works the other way, too.
Lowering the temperature slows down most reactions. If you set the oven temperature
too low, your cake will not bake properly.
*Using the information above, explain why we use refrigerators to preserve food? Be
sure to use two specific examples from the text.
