8th Grade Science Final Review

A _________ does not result in a new substance being formed.

• chemical change

• physical change

• chemical reaction

Tags

NGSS.MS-PS1-4

A _________ occurs when two or more substances join to form new substances with new properties.

• chemical change

• phase change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

True or false?

The speed of light is affected by mediums. As light passes through a new medium, light changes speed causing it to bend.

• true

• false

Tags

NGSS.MS-PS4-2

True or false?

When white light strikes an object, we only see the colors that are absorbed.

• true

• false

Tags

NGSS.MS-PS4-2

The color of objects that we see is the color of the wavelength that is _______ from its surface.

• opaque

• absorbed

• reflected

• shined

Tags

NGSS.MS-PS4-2

A compression of a wave can be described as...

• the part of a sound wave where the particles are close together

• the part of a sound wave where the particles are spread apart

• The resting point of the wave

A rarefaction of a wave can be described as...

• the part of a sound wave where the particles are close together

• the part of a sound wave where the particles are far apart

• the part of a wave where the particles are warm

Which of the following statements about sound waves is true?

• Sound is a transverse wave that can only travel in water.

• Sound waves cannot typically be easily decoded by animals

• A sound wave is a longitudinal wave that needs a medium in order to be transmitted.

Tags

NGSS.MS-PS4-2

In physics, what is a wave?

• A friendly way to say hello to another person

• A process to transfer electrons

• A disturbance that carries energy

Tags

NGSS.MS-PS4-1

How would you describe the particles in a gas?

• Very close together, vibrating in place

• Very far apart and in random motion

• Very far apart and not moving

• Close together and not moving

Tags

NGSS.MS-PS1-4