7th Grade Q2 BMA EXAM 2024-2025

The sun’s energy arrives as radiation on Earth.  When Hector was at the beach, he especially enjoyed the warmth of the sun. Which type of radiation from the Sun caused Hector to feel warm?

• visible light

• microwave radiation

• infrared radiation

• ultraviolet radiation

Light travels through different substances at different speeds.  How does the speed of light through water compare to its speed through a plastic milk jug?

• The speed is faster through the plastic milk jug because the molecules are closer together.

• The speed is slower through the plastic milk jug because the molecules are closer together.  

• The speed is slower through the plastic milk jug because the molecules are farther apart.

• The speed is faster through the plastic milk jug because the molecules are farther apart.
  

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NGSS.MS-PS4-2

Sound waves travel at different speeds through different materials. Through which of the following materials will sound waves travel the fastest?

• copper rod

• swimming pool

• air on a cold day

• sauna filled with steam

Tags

NGSS.MS-PS4-2

Sound waves can move at different speeds. What can affect the speed at which sound waves travel?

• the amplitude of sound waves

• the material through which sound waves travel

• the distance over which sound waves travel

• the frequency of sound waves

Tags

NGSS.MS-PS4-2

The image shows light entering water. Which statement explains why light bends when it reaches the surface of the water?

• Light bends because water changes the amount of energy it carries.

• Light bends because water absorbs some of the light that reaches it.

• Light bends because water changes its speed when it moves from air into water.

• Light bends because the water reflects some of the light that reaches it.

A change of state may happen when energy as heat is transferred to or from a substance. Which change of state could occur as energy is added to a substance?

• gas --> solid

• liquid --> solid

• gas --> liquid

• liquid --> gas

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NGSS.MS-PS1-4

Denise measured the temperature of two objects over a period of time. The temperature of Object 1 changed from 22 °C to 28 °C. The temperature of Object 2 changed from 22 °C to 20 °C. Which of the following was Denise able to conclude from her experiment?

• Energy as heat was removed from Object 2.

• Energy as heat was removed from Object 1.

• Energy as heat was transferred to both objects.

• Energy as heat was removed from both objects.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

On a warm sunny afternoon, ocean water splashed onto a rock.  A short time later, the rock was dry.  Which statement best explains what happened to the water on the rock?

• Heat caused the water to become a gas.

• Heat melted the water and it disappeared.

• Salt caused the water to become a gas.

• Salt melted the water and it disappeared.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Energy cannot be created or destroyed. In Kevin’s favorite comic book, the superhero has special powers. In one adventure, the superhero must stop an evil villain who threatens to destroy the city with a powerful energy blast. As he confronts the villain, he makes the following claims:

 

1: “I can create an energy force field to save the city.”

2: “I can destroy the energy before it destroys the city.”

3: “I can convert all the energy before it can do any harm to the city.”

4: “I can remove all the energy and make it go away.”

 

If the superhero must obey the law of conservation of energy, which of the above can he actually do?

• 1

• 2

• 3

• 4

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NGSS.HS-PS3-4

Katrina tried to use her new laptop but discovered that its battery was dead. What happened to the battery?

• All the stored energy had been destroyed.

• Kinetic energy had been changed into potential energy.

• All the energy stored in the battery had been transformed.

• Only chemical energy remained stored in the battery.

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NGSS.MS-PS3-4

NGSS.MS-PS3-5