Science- AJ

The rate of change of velocity of an object with respect to time is called

• mechanical wave

• doppler effect

• acceleration

• amplitude

What is a mechanical wave?

Which law of motion says that you must push or pull objects harder if they have more mass?

• 1st

• 2nd

• 3rd

• 4th

Letting go of a balloon full of air is demonstrating Newton's ______ _______ ________ _________ because the air comes out of the back and the balloon moves forward.

• 1st law of motion

• 2nd law of motion

• 3rd law of motion

• 13th law of motion

What law is best described by inertia?

• 1st

• 2nd

• 3rd

• law of conservation of mass

Newton's third law states that any action will have a(n) _______ and ______ reaction

• Equal and similar

• Equal and opposite

• Equal and different

• Greater and opposite

What is this graph representing?

• Constant Speed

• Acceleration (speeding up)

• Deceleration (slowing down)

• No motion

What is the Doppler effect?

• The observed change in frequency of sound or light because of the relative motion of a wave source and the observer.

• The observed change in amplitude of sound or light because of the relative motion of a wave source and the observer.

• The observed change in wave speed of sound or light because of the relative motion of a wave source and the observer.

• The observed change in equilibrium position of sound or light because of the relative motion of a wave source and the observer.

The maximum distance from the center line to the top of the crest or the bottom of the trough is called the __________ of the wave.

• amplitude of the wave
• wavelength of the wave
• frequency of the wave
• speed of the wave

The molecules in the picture are tightly held together with little movement. They have shape and energy.  Therefore, the picture represents _________.

• solid
• liquid
• gas
• plasma