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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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Two students performed experiments to test a hypothesis that particles of matter are continually in motion. The students’ experiments are as follows: (1) Student one opened a bottle of perfume in a classroom and the aroma could soon be smelled in distant parts of the classroom. (2) Student two shined a flashlight in a dark classroom and noticed many particles moving through the beam of light.
Which best describes the experiments, conclusions and methods?
a. Both students did not find evidence to support the hypothesis that particles of matter continually move.
b. Both students did find evidence to support the hypothesis that particles of matter continually move.
c. Both students found evidence that particles are not constantly moving.
d. Student one found evidence to support the hypothesis, while student two did not.
Correct Answer: b
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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Kim opened a bottle of flowery perfume in the back of the classroom. After a minute, Pat, in the front of the classroom, remarked that she smelled flowers. Which of the following statements best explains Pat’s observations?
a. Particles move through diffusion so Pat smelled the perfume.
b. The particles of perfume did not move because not everyone could smell the perfume when Pat did.
c. Pat smelled the perfume because she was told she should be able to.
d. Pat was mistaken. There could not have been a perfume smell.
Correct Answer: a
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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If you were to carefully measure the width of cracks in the sidewalk at many different times during a two-year period, which would you expect to find?
a. The cracks would remain the same size throughout the time.
b. The cracks would be wider during winter than during the summer.
c. The cracks would continue to get narrower as time passes.
d. The cracks would continue to widen as time passes.
Correct Answer: b
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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A railroad track was built with all of the rails fitting tightly together, touching each other end-to-end. Six months later, the track was ruined when the rails expanded and buckled. What may have caused the rails to expand?
a. As the weather got warmer, the particles in the rails moved more slowly.
b. As the weather got colder, the particles in the rails moved more slowly.
c. As the weather got warmer, the particles in the rails moved faster.
d. As the weather got colder, the iron in the rails froze.
Correct Answer: c
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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The theory that explains the
movement of particles suggests that
a.
particles do not move.
b.
only particles of a gas move.
c.
only particles of a liquid move.
d.
particles of solids, liquids, and gases move.
Correct Answer: d
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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You are asked to demonstrate that
the volume of a gas expands when heated and contracts when cooled. You do an experiment using a balloon. First you inflate and tie off a balloon,
then measure the circumference at room temperature. Then you put the balloon in a freezer for an hour, measure the
circumference, and find that it has contracted. When you put the balloon in a warm room for a time, the balloon
expands and the circumference increases.
What is the independent variable in this experiment?
a. The balloon
b. The volume of air in the balloon
c. The
temperature of the air in the balloon
d. The
time of day the experiment is performed
Correct Answer: c
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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One of the best ways to weaken the
bonds holding particles together is by
a.
heat
b.
grinding
c.
movement
d.
pressure
Correct Answer: a
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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A student measured the circumference of an inflated balloon and then put it into a freezer. After 30 minutes, the student took the balloon out of the freezer and measured the circumference again. The student found the circumference was smaller. The student concludes that volume is affected by temperature. Which answer best describes the conclusion made by the student?
a. Volume is affected by temperature is a good conclusion because it is based on observable evidence.
b. Volume is affected by temperature is a good conclusion because it can’t be proven.
c. Volume is affected by temperature is a bad conclusion because it could not be observed in this experiment.
d. Volume is affected by temperature is a bad conclusion because results can vary depending on what the student wants his answer to be.
Correct Answer: a
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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A metal lid was very tightly screwed onto a glass jar. To get the jar open, Kelly held the lid under hot water. Why was Kelly able to remove the lid?
a. Metal particles move more rapidly when heated so the particles moved further apart, and the lid became looser.
b. Metal particles move less rapidly when heated so the particles moved closer together, and the lid became looser.
c. The metal particles did not move. The water loosened the lid.
d. The metal particles melted because the water was so hot.
Correct Answer: a
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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Beaker |
Temperature in Celsius |
Time until mixed |
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A |
3 degrees |
3 minutes 45 seconds |
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B |
20 degrees |
2 minutes 10 seconds |
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C |
90 degrees |
1 minute 15 seconds |
Students conducted an experiment testing the time it takes food coloring to mix with water. The results of the experiment are summarized in the table above. Which of the following best explains the results:
a. The coloring mixed faster in A because the molecules in cold water move faster.
b. The coloring mixed faster in C because the molecules in hot water move faster.
c. The coloring mixed slower in A because the molecules in cold water move faster.
d. The coloring mixed slower in C because the molecules in cold water move slower.
Correct Answer: b
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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Two different people with two different jobs watch what they think is an example of diffusion. Terry the baker watches food-coloring mix in a bowl of water without even stirring it. Kelly the salesperson can soon smell perfume as it spreads throughout the room without any air movement. Which of the following statements is true about their observations?
a. Both Terry and Kelly are watching examples of diffusion and since they both observed it, this shows that science is a way of knowing used by more than just scientists.
b. Both Terry and Kelly realize that the food coloring and perfume were not examples of diffusion; this shows that science is a ways of knowing used by more than just scientists.
c. Both Terry and Kelly were watching examples of diffusion but both must be scientists because science is a way of knowing that is only used by scientists.
d. Both Terry and Kelly realize they are not watching diffusion because they are not scientists and science is a way of knowing used only by scientists.
Correct Answer: a
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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Beaker |
Temperature in Celsius |
Time until mixed |
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A |
3 degrees |
3 minutes 45 seconds |
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B |
20 degrees |
2 minutes 10 seconds |
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C |
90 degrees |
1 minute 15 seconds |
Students conducted an experiment testing the time it takes food coloring to mix with water. The results of the experiment are summarized in the table above. Which of the following best explains the results:
a. The coloring mixed faster in A because the molecules in cold water move faster.
b. The coloring mixed faster in C because the molecules in hot water move faster.
c. The coloring mixed slower in A because the molecules in cold water move faster.
d. The coloring mixed slower in C because the molecules in cold water move slower.
Correct Answer: b
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MC |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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A teacher does a demonstration in class using a steel ball and a steel ring (see illustration below).
The teacher heats the steel ball over a Bunsen burner and then cools the steel ball in a glass of ice water. Based on what you know about the relationship between temperature and motion of particles, choose the best explanation for this experiment.
a. The steel ball will fit because it was heated, causing the molecules to contract.
b. The steel ball will not fit because it was heated, causing the molecules to expand.
c. The steel ball will fit because it was cooled, causing molecules to expand.
d. The steel ball will not fit because it was cooled, causing the molecules to contract.
Correct Answer: b
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E |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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When a bottle of perfume is opened,
the aroma of the perfume can soon be detected in distant parts of the room.
Explain how this happens. What scientific hypothesis does this help to prove?
Correct Answer: When
a bottle of perfume is opened some of the particles from the liquid enter the
air and collide with one another, rebound, and spread in all directions
throughout the room. This occurrence helps to prove the hypothesis that
particles are constantly moving.
Scoring Guide:
correct- 40%
complete- 40%
well written- 20%
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E |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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Distinguish between the motion of
particles in a gas, liquid and solid.
Rubric:
4 - motion is fastest in a gas,
medium in a liquid, slowest in a solid
3 - discusses two of the states
2 - discusses one of the states
1 - no discussion of speed of
particles
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P |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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INVESTIGATING DIFFUSION
Materials Needed:
Beaker of water
Food Coloring
Directions:
1. You are going to create a model
of diffusion, and then by observing what happens, you will be able to define
diffusion.
2. Put one drop of food coloring
into the beaker of water.
3. What do you think will happen to
the drop of food coloring?
4. Observe what happens to the food
color and the water and write down what happens here:
5. The food coloring added to the
water is an example of diffusion. From what you observed, what is the
definition of diffusion?
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P |
7th Grade Integrated Science |
Standard: 01 |
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Objective: 03. Investigate the motion of particles. |
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ILO: |
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Observing
Food Coloring
Teacher
Information
You will need to set up 3 containers
(beakers) of water. One container
should be filled with very hot water, one with tap water, and one with very
cold water. Set up enough containers to accommodate your students. In might be
helpful to set up work stations. It is important that the students do not
know what is in the containers and what temperature the water is.
Make food coloring available for
student use.
Scoring Guide:
Student Name(s):__________________________________
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The student should be able to: |
Where to find evidence of student performance: |
E |
G |
NI |
Points |
Make
observations
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Test sheet |
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Make predictions |
Test sheet |
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Write
answers/explanations in complete sentences |
Test sheet |
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Support answers |
Test sheet |
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Follow
directions |
Test sheet |
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E=Excellent
G=Good
NI=Needs Improvement