PMA 3 Science

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-PS3-4

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-PS3-5

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-PS3-5

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

The diagram shows heat being transferred throughout the atmosphere. Which type of heat transfer is occurring at location B of the diagram?

• convection

• conduction

• radiation

• precipitation

A basic principle for scientific research is that the experiment must be able to be replicated. What happens when an experiment is replicated?

• A scientist publisher accepts the experimental results for printing.

• No one in the scientific community agrees with the methods or results.

• Other scientists perform the same experiment and get comparable results

• The scientific researcher preforms the experiment many times and gets the same results.

Sal is studying the solar system. He makes a physical model using different-sized foam balls to represent the planets. Which best describes why a physical model is a useful tool for studying the solar system?

• Solar system models can be used to study a system that is too big to study directly.

• A model of the solar system eliminates the need for scientists to study the solar system directly.

• A model of the solar system provides an exact replica of the actual solar system, so scientists can experience what each planet is like.

• A model of the solar system can provide more data about the solar system than direct observations.

Tags

NGSS.MS-ESS1-2

What is the net force of an object that is not moving?

• 0 N

• 100 N

• Upward force

• 10 N

Tags

NGSS.3-PS2-1

When will the forces of gravity between two objects be the GREATEST?

• when the masses of both objects are small and the objects are far apart

• when the masses of both objects are large and the objects are close together

• when the masses of both objects are small and the objects are close together

• when the masses of both objects are large and the objects are far apart

Tags

NGSS.MS-PS2-4

Which statement about gravity is true?

• gravity causes objects to pull towards one another

• gravity causes objects to push away from each other

• gravity only takes place between planets

• the moon doesn't have any gravity

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4