Warm Up 9/6/13Turn in day! You should have 6!

What happens to a solid object with a density that is less than water when it is placed in water?A. The object sinks about halfway into the water.B. The object displaces a quantity of water greater

than its volume.C. The object settles to the bottom of the water.D. The object floats on top of the water.

Warm Up 9/6/13Turn in day! Don’t forget your name!

What happens to a solid object with a density that is less than water when it is placed in water?A. The object sinks about halfway into the water.B. The object displaces a quantity of water greater

than its volume.C. The object settles to the bottom of the water.D. The object floats on top of the water.

Enrichment & Remediation

Remediation: 79 or lower on testAll others (blue is must-do, green is choice): 1. Review missed problems2. Finish Explosions reading activity3. Finish Double-Bubble Map4. Fix P.O.E. (make sure you have at least 2: Ice melting &

Alka-Seltzer tablet)5. Skills Tutor (will be assigned)6. Science Games7. Silent Reading

Warm Up 9/6/13Turn in day! You should have 5!

A controlled experimentA. is not always possible.B. contains a test group.C. has only one variable.D. All of the above

Warm Up 9/6/13Turn in day! Don’t forget your name!

A controlled experimentA. is not always possible.B. contains a test group.C. has only one variable.D. All of the above

Today’s Work Session

1. 3-2-1 Reflection2. Finish Circle Map (poster or individual)3. Finish Science World assignment4. Work on Testable Questions (complete

the first assignment if you don’t know how to do the other two)

3-2-1 TOTD

• Three things you know about scientific methods

• Two questions you still have about this topic• One question you would like to answer in a

scientific investigation (it needs to be something you are interested in and can do – you are going to use this question for other assignments)

Poster

Paragraph discussing the three types of investigation

descriptive comparative

experimental

Lunch Line Expectations

• Line up SILENTLY• Line up in a SINGLE FILE LINE• Line up and KEEP YOUR HANDS & FEET TO

YOURSELF• There AND back• If you can’t handle this, then you will have

ASSIGNED SEATS at lunch

Test Today

• Use the first ten minutes of class to ask questions and review

• You can write on the test• After the test, read the article on explosions

and complete the guided reading worksheet• If you finish all of that, you can read or work

on something for another class

Quiz Today

• Use the first ten minutes of class to ask questions and review

• You can write on the quiz• After the quiz you need to work on your

Science World assignment • If you are finished with that, you can read or

work on something for another class• 2nd & 4th – we will finish posters tomorrow

Warm Up 9/4/13

Which of the following is NOT the result of a chemical change?A. soured milkB. ground flourC. rusted metalD. digested food

Warm Up 9/4/13

Which of the following is NOT the result of a chemical change?A. soured milkB. ground flourC. rusted metalD. digested food

Agenda & Homework

• Brain Pop – The pH Scale• Ch-ch-changes Demos & Hands-On• 3-2-1 TOTD

• Homework: Study for TEST tomorrow

Test Tomorrow

• States of Matter – solid, liquid, gas, plasma (volume, shape, molecules)

• Changes of State – melting, freezing, vaporization, condensation, sublimation (what changes happen when adding or taking away energy)

• Physical & Chemical Properties & Changes – examples of each, how to tell them apart

• All returned work, Ch. 2.2, 2.3, 3.1, 3.3

Predict, Observe, Explain

• What do you think will happen?• Make observations – note color changes,

bubbling/fizzing, heat/light, formation of new substances, changes of state/shape/form

• Explain – physical or chemical? Why?

3-2-1 Ticket Out The Door

• Three things you have learned about changes• Two questions you still have• One most interesting change you observed

today

Warm Up 9/4/13

The scientific process begins with asking questions andA. making observations.B. reading background.C. planning experiments.D. answering them.

Warm Up 9/4/13

The scientific process begins with asking questions andA. making observations.B. reading background.C. planning experiments.D. answering them.

Agenda & Homework

• Circle Map & Paragraph• 3-2-1 TOTD • Homework – study for tomorrow’s quiz• Know the 3 types of investigations• Know parts of the scientific method (hypothesis,

independent & dependent variables, data, conclusion)

• Know the difference between qualitative and quantitative

Warm Up 9/3/13

What is the best way to tell if a chemical change has taken place?A. The matter changes color.B. The change is reversible.C. A mixture separates into layers.D. The composition changes.

Warm Up 9/3/13

What is the best way to tell if a chemical change has taken place?A. The matter changes color.B. The change is reversible.C. A mixture separates into layers.D. The composition changes.

Agenda & Homework

• Notes on physical & chemical changes• Card Sort (copy correct answers into

notebook)• Double Bubble – compare & contrast physical

and chemical CHANGES• Ticket Out The Door• Homework: complete Double Bubble & TOTD

if not finished in class

Physical and Chemical Changes

• Properties are what a substance HAS; changes are what a substance DOES

• In other words: properties tend to be adjectives and descriptive; changes tend to be verbs and active

Evidence

• Signs of a physical change include changes in state, shape, or form but not composition

• Physical changes are USUALLY reversible• Sign of a chemical change include the release

of light or heat• The substance may look very different• Chemical changes are USUALLY irreversible• Bubbling & color change can be tricky

You try it!

• Name That Change• Card Sort – once you have the correct info,

copy into your notebook• On a clean page, create a Double Bubble Map

comparing & contrasting the two changes• Remember: similarities in the middle,

differences on the outside, and for every point, you need a counterpoint

Warm Up 9/3/13

Which of the following is a good way to analyze data?A. Organize it into charts and graphs, and do

calculations if necessary.B. Check it over, and then copy it.C. Put it away for a few months to see if it makes

more sense later.D. Try to find some way to make it support your

hypothesis.

Warm Up 9/3/13

Which of the following is a good way to analyze data?A. Organize it into charts and graphs, and do

calculations if necessary.B. Check it over, and then copy it.C. Put it away for a few months to see if it makes

more sense later.D. Try to find some way to make it support your

hypothesis. NEVER!!!

Agenda & Homework

• Notes: Drawing a Conclusion (2nd period needs to catch-up on other notes)

• Video: Scientific Methods (complete graphic organizer)

• Poster: 3 Circle Maps (descriptive, comparative, experimental) & a paragraph

• TOTD: 3-2-1 • Homework: Scientific Method worksheet

Drawing Conclusions

• Ask yourself: Do the data support my hypothesis? Did what I think would happen, happen?

• Yes? You or others may want to try again to verify the results

• No? Check for errors and try again• Still no? You may have to rethink or reject

your hypothesis

Warm Up 8/30/13*NOT a turn in day

A chemical change takes place during a laboratory investigation of the properties of magnesium. Which of the following may have been observed?A. Magnesium burns in the presence of oxygen.B. Magnesium melts at 649°C.C. Magnesium becomes malleable when it is

heated.D. Magnesium conducts an electric current.

Warm Up 8/30/13*NOT a turn in day

A chemical change takes place during a laboratory investigation of the properties of magnesium. Which of the following may have been observed?A. Magnesium burns in the presence of oxygen.B. Magnesium melts at 649°C.C. Magnesium becomes malleable when it is

heated.D. Magnesium conducts an electric current.

Project Turn-In

• Make sure sheet is COMPLETE!• Don’t forget to complete the section about

your process!• Make sure your name is on your bottle.

Warm Up 8/30/13*NOT a turn-in day

• Complete the “Pretest” side of the graphic organizer packet

• You have 2 CRCT questions – save them in a safe place to add to next week’s set.

• Process Skills project due dates pushed up• Quiz on the scientific method next

WEDNESDAY• Short Observations video

Recording and Presenting DataScience Book pages 766-767 & 770-772

• Important to keep accurate records• Record independent and dependent variables• DRY MIX (dependent/responding Y-axis,

manipulated/independent X-axis• Pie chart – parts to a whole• Line graph – trends over time, continuous

change• Bar Graph – non-continuous change

Warm Up 8/27/13

Which of the following statements about chemical properties is true?A. They can be observed when the identity of a

substance changes.B. They can always be observed without changing the

identity of a substance.C. They are easier to observe than physical properties.D. They are the properties that are most useful in

identifying a substance.

Warm Up 8/27/13

Which of the following statements about chemical properties is true?A. They can be observed when the identity of a

substance changes.B. They can always be observed without changing the

identity of a substance.C. They are easier to observe than physical properties.D. They are the properties that are most useful in

identifying a substance.

Agenda & Homework

• Review homework• Dunkin’ For Density Lab

• Homework: study for tomorrow’s quiz (chapter 2.2 & 2.3 – check out Study Jams & Brain Pop, too)!

• Work on At-Home Science

Dunkin’ For Density

• Make a film canister float, suspend, and sink• Must have SOMETHING in the canister• Find MASS on the balance• Find VOLUME using displacement (see page 40

in science book)• Calculate DENSITY• Complete lab sheet (work with a group, but

each person must turn in his/her own sheet)

Volume by Displacement

• Fill a graduated cylinder to a known amount (example: 100 ml)

• Put your object in the cylinder (film canisters must be filled with water)

• Record the new height of the water (example: 137 ml)

• Subtract to find volume (example: 137 – 100 = 37 ml)

Warm Up 8/27/13

Before asking questions, what is a scientist likely to do?A. make answers that workB. make necessary arrangementsC. make observationsD. make reservations

Warm Up 8/27/13

Before asking questions, what is a scientist likely to do?A. make answers that workB. make necessary arrangementsC. make observationsD. make reservations

Agenda & Homework

• Observation & Inference Notes• Choice 1: work on Science World assignment (due

Friday)• Choice 2: work on Science Process Skills mini-

projects (first one due Friday)• Choice 3: finish Skills Tutor pretests• Homework: catch up on work (especially online

– if you don’t have a computer, then work on the offline work at home)

modified by Liz LaRosa www.middleschoolscience.com 2009, from original posted at:www.science-class.net/PowerPoints/Observation_Inference_8th.ppt

Observation & Inference

Observations• Any information collected with the senses.

• Quantitative – measureable or countable» 3 meters long» 4 marbles» 50 kilograms» 35 degrees Celsius

• Qualitative – describable, not measureable » red flowers» smells like fresh baked cookies» Tastes bitter

• The skill of describing scientific events

Inference• Conclusions or deductions based on observations.• The process of drawing a conclusion from given evidence. • Using what you KNOW together with what you SEE to make

an EXPLANATION or PREDICTION

Practice: • Observations:

• I hear people screaming• I smell cotton candy, popcorn, and hamburgers• I see a lot of people

• Inference = ?

Look at these two sets of animal tracks.

List 3 OBSERVATIONS

Make an INFERENCE

Now what do you think?

Make 3 OBSERVATIONSMake an INFERENCE

Now what do you think?

Make 3 OBSERVATIONSMake an INFERENCE

Source of graphic:

http://bob.nap.edu/html/evolution98/evol6-e.html

Warm Up 8/26/13

• Which physical property can be used to classify oxygen, helium, propane, and hydrogen as being similar?

• A. Flammability• B. State• C. Reactivity• D. Malleability

Warm Up 8/26/13

• Which physical property can be used to classify oxygen, helium, propane, and hydrogen as being similar?

• A. Flammability• B. State• C. Reactivity• D. Malleability

Agenda & Homework

• Card Sorts Formative Assessment • Double Bubble Map to compare and contrast

physical and chemical properties and changes• Stand Up/Sit Down Formative Assessment

• Homework: Density worksheet, At-Home Science Experiment

Warm Up 8/26/13

What are scientific methods?A. The steps scientists use to answer questions and

solve problemsB. The steps scientists use to look up the answers

to questionsC. The steps scientists use to ensure a hypothesis is

supportedD. The steps scientists use to answer questions and

cause problems

Warm Up 8/26/13

What are scientific methods?A. The steps scientists use to answer questions

and solve problemsB. The steps scientists use to look up the answers

to questionsC. The steps scientists use to ensure a hypothesis is

supportedD. The steps scientists use to answer questions and

cause problems

Agenda & Homework

• Brief notes on background research• Choice 1: work on Science World assignment (due

Friday)• Choice 2: work on Science Process Skills mini-

projects (first one due Friday)• Choice 3: finish Skills Tutor pretests• Homework: catch up on work (especially online

– if you don’t have a computer, then work on the offline work at home)

Background Research

• Necessary so that you know how to design and understand your experiment.

• Identify the keywords in the testable question(s)• Remember your “5 Ws and H” (who, what, why,

when, where, how)• List mathematical formulas or equations • Research the history of similar experiments or

inventions• Network – who do you know that could help?