Term 2 Week 5

Compressing a spring increases its —

• kinetic energy

• potential energy

• electrical energy

• chemical energy

Which of the following objects has the most potential energy?

• a rolling ball

• a boulder at the edge of a cliff

• a car going through a green light

• a skydiver that is free-falling from an airplane

Which of the following statements about waves are true? Select ALL that apply

• A wave is a disturbance that transfers energy from place to place.

• Waves are generated when a source of energy forces matter to vibrate

• All waves need a medium to travel through.

• Waves can be classified into two main groups: mechanical and electromagnetic.

• Waves can only travel through liquids or gases.

Your teacher displays the following diagram of a wave.

Your classmates were then asked to describe what type of mechanical wave this diagram shows. Two students made these statements:

Ben: That's a longitudinal wave.

Maddie: I think it's a transverse wave! Which student is correct?

• Ben

• Maddie

• both students

• neither student

Your teacher displays the following diagram of a wave.

Your classmates were then asked to describe what type of mechanical wave this diagram shows. Two students made these statements:

Ben: That's a longitudinal wave.

Maddie: I think it’s a transverse wave! What evidence best supports your choice?

• A. Longitudinal and transverse waves are both mechanical waves.

• B. The medium moves perpendicular to the direction the wave is travelling.

• C. The medium moves parallel to the direction the wave is travelling.

• D. Mechanical waves can only travel through a medium.

What are the two main types of mechanical waves?

• A. microwaves and sound waves

• B. radio waves and water waves

• C. transverse waves and longitudinal waves

• D. ultraviolet waves and visible light waves

What does a wave transfer from one place to another?

• matter

• energy

• heat

• water

The diagrams show two waves. Select the two answers that apply to Wave B.

• low energy

• high energy

• low amplitude

• high amplitude

Which area of the flashlight represents electrical energy? Select the correct answer.

• Batteries

• Electric Wire

• Light Bulb

In the diagram above, where is light energy converted to chemical energy?

• Sun

• Grass

• Grasshopper

• Hawk