scientific method the metric system matter & water macromolecules & enzymes cells 10 20 30...
TRANSCRIPT
Scientific Method
The Metric System
Matter & Water
Macromolecules & Enzymes Cells
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20 20 20 20 20
30 30 30 30 30
40 40 40 40 40
50 50 50 50 50
Question 1 - 10
• You should always be aware of and follow these in a lab.
Answer 1 – 10
• What are lab safety rules?
Question 1 - 20
• A hypothesis is a proposed scientific explanation based on prior knowledge. A well tested explanation that unifies a broad range of observations is this.
Answer 1 – 20
• What is a theory?
Question 1 - 30
• Scientists are always observing a doing this. It is the first step of the scientific method.
Answer 1 – 30
• What is asking questions?
Question 1 - 40
• This type of variable refers to what is observed or measured in an experiment. It changes in response to the manipulated variable.
Answer 1 – 40
• What is the responding variable?
Question 1 - 50
• In an experiment, this is the variable that you purposefully change. In our rabbit example, it would be the rabbit who was given the ice pack.
Answer 1 – 50
• What is the manipulated variable?
Question 2 - 10
• This is the common measurement system used by scientists. It is based on a scale that moves by multiples of 10.
Answer 2 – 10
• What is the metric system?
Question 2 - 20
• This is the metric unit of measurement for mass. We use a triple beam balance to measure these.
Answer 2 – 20
• What is a gram?
Question 2 - 30
• 71.0 kiloliters is equal to this many decaliters?
Answer 2 – 30
• What is 7,100 decaliters?
Question 2 - 40
• This unit of the metric system is used to measure the size of very small objects, such as the length of a cell. It is 1/1000 of a milimeter.
Answer 2 – 40
• What is a mircrometer (nm)?
Question 2 - 50
• These are the seven prefixes of the metric system. They are represented by KHDUDCM.
Answer 2 – 50
• What are kilo-, hecto-, deca-, base unit, deci-, centi-, mili-?
Question 3 - 10
• All atoms will have the same number of these two subatomic particles. Their positive and negative charges cancel each other out, making the atom neutral.
Answer 3 – 10
• What are protons and electrons?
Question 3 - 20
• These produces a higher number of H+ ions when in a solution. They range from 1-6 on the pH scale.
Answer 3 – 20
• What is an acid?
Question 3 - 30
• This is the attraction between a H atom and an electronegative atom, such as O. It is the bond that holds water molecules together.
Answer 3 – 30
• What are hydrogen bonds?
Question 3 - 40
• Weak acids and bases are found towards the middle of the pH scale, closest to this number. It is the pH of pure water.
Answer 3 – 40
• What is 7?
Question 3 - 50
• Our bodies need to maintain a specific range of pH all over, except here, which is much more acidic.
Answer 3 – 50
• What is the stomach?
Question 4 - 10
• Enzymes speed up chemical reactions, making them biological ones of these.
Answer 4 – 10
• What are catalysts?
Question 4 - 20
• This macromolecule is made up of a glycerol molecule and three fatty acids chains. It helps make up part of the cell membrane.
Answer 4 – 20
• What are lipids?
Question 4 - 30
• These macromolecules give us our main source of energy, even if it is only for a short period of time.
Answer 4 – 30
• What are carbohydrates?
Question 4 - 40
• Enzyme function can be effected by drastic changes in these two internal conditions.
Answer 4 – 40
• What are temperature and pH?
Question 4 - 50
• An amino acid structure contains an amino group, a carboxyl group and this, which is different for each amino acid.
Answer 4 – 50
• What is the R-group sidechain?
Question 5 - 10
• These are the two inventors of the microscope. Without them, we would have never discovered the cell.
Answer 5 – 10
• Who are Robert Hooke and Anton van Leeuwenhoek?
Question 5 - 20
• This type of microscope uses a very fine probe to view the surface of a specimen. You can see live organisms with it.
Answer 5 – 20
• What is a scanning probe microscope?
Question 5 - 30
• In plant cells, this is the outermost layer, which provides structure, support and protection.
Answer 5 – 30
• What is the cell wall?
Question 5 - 40
• These are three structures of the cell responsible for making and sending proteins where they need to go.
Answer 5 – 40
• What are the ribosomes, endoplasmic reticulum and golgi apparatus?
Question 5 - 50
• This is one characteristic of all cells. In eukaryotic cells it is found in the nucleus. In prokaryotic cells it is free floating.
Answer 5 – 50
• What is DNA?