7th Grade: Amplify Benchmark Semester 2

1. Students are studying various forms of matter. They just finished studying solids, liquids, and gases. Now they must draw a model that represents their observations. Which model best represents what happens to gas molecules in a closed container?

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NGSS.MS-PS1-4

2. The models below represent the particles of one substance in different phases of matter. Select the answer that best describes the relative thermal energy among the states of matter.

• Solid is less than liquid, which is less than gas.
• Solid is the same as liquid, which is less than gas.
• Solid is the same as liquid, which is the same as gas.
• Solid is greater than liquid, which is greater than gas.

Tags

NGSS.MS-PS1-4

3. When Deja mixed a clear liquid (A) and a dark liquid (B) together, the mixture (C) got warm and bubbled. Deja wanted to determine whether a chemical reaction occurred, so she collected data on some properties. His data are in the table below.

• No. Liquid B and Liquid C both burn in air, so they are the same substance.
• No. The color of Liquid C is the same as Liquid B, so they are the same substance.
• Yes. Liquid C has a different density than Liquid A or Liquid B, so a new substance has formed.
• Yes. The mass of Liquid C is not the same as Liquid A or Liquid B, so a new substance has

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NGSS.MS-PS1-2

4. Select ALL of the images below that represent a chemical reaction.

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NGSS.MS-PS1-2

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5. Your teacher places ice cubes in a beaker. She sets the beaker on a hot plate. As expected, the ice turns into water. It then boils, producing steam. Soon, all of the water appears to be gone. Below pictures A, B and C show the three different phases of water from the teacher’s demonstration. In which state are the molecules moving the fastest?

• A
• B
• C
• A and C

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NGSS.MS-PS1-4

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6. Your teacher demonstrates one more way in which molecules behave when they are heated. She carefully warms a sealed plastic water bottle using a hand warmer. As the bottle of water gets warmer, the container changes. Select the best explanation of what happens as thermal energy increases.

• Heat takes up space and causes the bottle to expand.
• The molecules move faster and closer together, which causes the bottle to collapse.
• The molecules move slower and closer together, which causes the bottle to collapse.
• The molecules move faster and farther apart, which causes the bottle to expand.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

7. In the food web, there are decomposers you can see, like worms. There are also decomposers that you can’t see, such as bacteria in the soil. If you want to determine if these bacteria undergo cellular respiration, which of the following questions would you ask?

• Do the bacteria take in sunlight from the ecosystem?
• Do the bacteria release oxygen into the ecosystem?
• Do the bacteria take in water from the soil?
• Do the bacteria release carbon into the ecosystem?

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NGSS.MS-LS2-3

8. Plants and animals get the energy for life-supporting functions from a process called cellular respiration. When combined with photosynthesis, it represents a cycle of matter and flow of energy between animals and plants. Evaluate the model. What parts would you change in the model to make it represent this cycle correctly? Select ALL that apply.

• Part A
• Part B
• Part C
• Part D
• Part E

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NGSS.MS-LS2-3

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9. Sam’s pet lizards reproduced, and 30 baby lizards hatched. There were too many to take care of, so he set the baby lizards free outside his home. The lizards were originally from Africa and are not native to the ecosystem near his home. Therefore, the lizards do not have any natural predators. Worms are the primary food for these lizards. How do you think the introduction of the lizards will affect the populations of bees and birds in the ecosystem? Use the food web from the introduction to help you answer this question. Select the graphs that best represent what will happen.

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NGSS.MS-LS2-1

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10. Tanisha and Sanjay both live near a stream. Sanjay lives near one end of the stream, while Tanisha lives at the other end, which is about 2 miles from Sanjay. They both learned a lot about the stream by doing research on the number and types of organisms that live in these locations. They made a table, shown below, with the results from this research. Choose the argument that best supports the claim regarding the healthiest ecosystem.

• Sanjay’s location is healthier than Tanisha’s because it has a much greater biodiversity, and it has not changed much over time.
• Tanisha’s location is healthier than Sanjay’s because it has a much greater biodiversity, and it has not changed much over time.
• Sanjay’s location is healthier than Tanisha’s because it has a much greater aquatic animal biodiversity, and it has changed more over time.
• Both Tanisha and Sanjay are near locations that could be considered equally healthy due to the biodiversity at each location, and lack of major changes in biodiversity over time.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4