8th Grade Physical Science Unit 1 Part A Review

Which of the following statements correctly describes the images?

• The particles in model 1 move faster than the particles in model 2.

• The particles in model 3 move fast enough to break away from each other.

• The particles in models 1 and 2 are locked in place.

• The particles in model 2 are affected by electric and magnetic fields.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Carla has found evidence that liquid water becomes ice at its freezing point. Which of the following claims is best supported by her find?

• Energy is removed from the water, so its particles lock into place.

• Energy is added to the water, so its particles move slower.

• Energy is removed from the water, so its particles move apart.

• Energy is added to the water, so its particles move faster.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which piece(s) of evidence best support that boiling water is a physical change?

• This change can be reversed through condensation.

• The speed of the particles increases.

• The composition of water remains the same.

• All of the above

Tags

NGSS.MS-PS1-4

Which of the changes of state happen when increasing temperature?

• condensation and melting

• freezing and boiling

• boiling and melting

• freezing and condensation

Tags

NGSS.MS-PS1-4

Which of the following occurs when heating a liquid?

• The particles break away from one another.

• The particles move closer together.

• The particles give off energy (the temperature goes down).

• The particles slow down.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In which example does ONLY a physical change take place?

• An old car rusting

• Crushing a piece of aluminum foil

• Cooking scrambled eggs

• Baking a cake

Which piece of evidence BEST supports the claim: Lighting a match is a chemical change?

• The temperature rises.

• The color of the match changes.

• After burning, the shape of the match is different.

• When the match burns it produces light, heat, and carbon dioxide.

Tags

NGSS.MS-PS1-2

_______ do not change shape in different containers.

• Plasma

• Gases

• Solids

• Liquids

Which of the following statements about chemical properties is true?

• They can always be observed without changing the identity of a substance.

• They are easier to observe than physical properties.

• They vary based on sample size.

• They can be observed when the identity of a substance changes.

Tags

NGSS.MS-PS1-2

The particles of water that evaporate from an open container have _______ than the particles that remain.

• greater order

• higher energy

• more speed

• more speed and higher energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5