Fast five 2
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Fast Five #2. Question 1. 1. Which of the following is a chemical change? A. melting an ice cube B. shredding paper C. burning a log D. dissolving salt in water. Question 1. 1. Which of the following is a chemical change? A. melting an ice cube B. shredding paper

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Fast Five #2

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Fast five 2

Fast Five #2


Question 1

Question 1

1. Which of the following is a chemical change?

A. melting an ice cube

B. shredding paper

C. burning a log

D. dissolving salt in water


Question 11

Question 1

1. Which of the following is a chemical change?

A. melting an ice cube

B. shredding paper

C. burning a log

D. dissolving salt in water


Question 1 explanation

Question 1 Explanation

Melting, shredding and dissolving do not create new product. They are physical changes.


Question 2

Question 2

2. When a solid melts, it changes from a solid to a liquid. As this change occurs, which of the following does not happen to the molecules?

A. Their average kinetic energy increases.

B. Their average motion increases.

C. They become less closely packed.

D. They rearrange themselves and form new molecules.


Question 21

Question 2

2. When a solid melts, it changes from a solid to a liquid. As this change occurs, which of the following does not happen to the molecules?

A. Their average kinetic energy increases.

B. Their average motion increases.

C. They become less closely packed.

D. They rearrange themselves and form new molecules.


Question 2 explanation

Question 2 Explanation

  • When something (like water) melts, the molecules move faster (more kinetic energy) and spread out. A new substance is not made.


Question 3

Question 3

3. Cells in the leaf and stem of a plant cell can convert energy from light into chemical energy during photosynthesis. However, if root cells are exposed to light, they will not undergo photosynthesis. Why are some plant cells unable to perform photosynthesis?

A. Not all cells have chloroplasts to do photosynthesis.

B. Some plant cells are killed by light exposure.

C. Not all cells need the energy from photosynthesis.


Question 31

Question 3

3. Cells in the leaf and stem of a plant cell can convert energy from light into chemical energy during photosynthesis. However, if root cells are exposed to light, they will not undergo photosynthesis. Why are some plant cells unable to perform photosynthesis?

A. Not all cells have chloroplasts to do photosynthesis.

B. Some plant cells are killed by light exposure.

C. Not all cells need the energy from photosynthesis.


Question 3 explanation

Question 3 Explanation

All cells need energy. Plant cells are all fine if exposed to some light. How do you know from these pictures that root cells do not have chloroplasts?


Question 4

Question 4

4. Which type of rock can be formed without a change in temperature?

A. igneous

B. sedimentary

C. metamorphic

D. All rocks form with a change in temperature.


Question 41

Question 4

4. Which type of rock can be formed without a change in temperature?

A. igneous

B. sedimentary

C. metamorphic

D. All rocks form with a change in temperature.


Question 5

Question 5

5. In the food web below, which organisms transfer the largest total amount of energy to other organisms?


Question 51

Question 5

5. In the food web below, which organisms transfer the largest total amount of energy to other organisms?

A


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