PMA

People get energy from eating plants such as lettuce and carrots. The plants get their energy from the Sun. What form of energy is stored in plants?

• thermal

• mechanical

• chemical

• light

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The roller coaster cart has the most gravitational potential energy at position

• Z

• Y

• W

• X

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

Which sentence explains why a cold metal spoon placed in a cup of boiling water becomes hot?

• Thermal energy is transferred from the spoon to the water.

• Thermal energy is transferred from the water to the spoon.

• Thermal energy in the water is transformed into kinetic energy in the spoon.

• Thermal energy in the spoon is transformed into potential energy in the water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Dominique decided to bring a picnic to the beach. She put warm bottles of water in an ice-filled cooler. In which direction is the thermal energy flowing in the cooler?

• there is no flow of energy

• from the bottles of water to the ice

• from the ice to the outside air

• from the ice to the bottles of water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

In 1920, the FL Power Corp. built the Jackson Bluff Dam to for a hydroelectric power plant. The photo below shows a hydroelectric power plant changing energy from one form to another. Which statement describes the energy transformation.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Observe the diagram of four beakers with the same amount of water in each. Which of the following statements is correct?

• Particles in Beaker B have more average kinetic energy than those in Beaker D

• Particles in Beaker C are not in motion.

• Beaker B has more particles than Beaker A

• Particles in Beaker B have more average kinetic energy than those in Beaker A

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Damon is a musician playing in a band. At the end of a song, he plucks a single guitar string. The string moves rapidly back and forth as shown in the figure. Which of these statements explains what happens to the kinetic energy of the moving string?

• The kinetic energy is changed into potential energy and stored.

• The kinetic energy is converted to sound energy and thermal energy

• The kinetic energy is destroyed until no energy remains.

• Some of the energy is converted to sound energy, but the rest is destroyed

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS4-1

The drawing on the left represents the way a volcano may have looked millions of years ago. All that remains today is the volcanic neck that is shown on the right.

What process has MOST likely caused the reduction in the size of the volcano?

• weathering

• plate movement

Tags

NGSS.MS-ESS2-2

The graph shows the chemical composition of Earth’s atmosphere.

Which of these gases in Earth’s atmosphere is MOST responsible for the chemical weathering of rock?

• oxygen

• nitrogen

Plants can break large rocks into tiny pieces. How is it possible for plants to be able to mechanically weather rocks by breaking them into smaller pieces?

• The plant wraps itself around the rock and forces it to crumble.

• The roots of the plant grow into the cracks of the rock forcing the rock to break.