Which statement best describes the fact that gases can be compressed?

• The particles in a gas do not have a fixed volume.

• The particles in a gas are very far apart.

• The particles in a gas have no force of attraction (bonds) between them.

• The particles in a gas are constantly moving very rapidly.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which statement best describes the fact that a liquid cannot be compressed?

• The particles in a liquid are all close and touching.

• The particles in a liquid are constantly moving.

• The particles in a liquid have weak attractive forces between them.

• The particles in a liquid can change position.

Tags

NGSS.MS-PS3-4

Which of the following substances did Robert Brown observe thus forming the concept of Brownian motion?

• Talc powder suspended in water

• Pollen grains suspended in water

• Talc powder suspended in air

• Pollen grains suspended in air

These particles are held together be very strong forces of attraction

• Solid
• Liquid
• Gas
• Plasma

Tags

NGSS.MS-PS3-4

Which statement best describes the fact that gases can be compressed?

• The particles in a gas do not have a fixed volume.

• The particles in a gas are very far apart.

• The particles in a gas have no force of attraction (bonds) between them.

• The particles in a gas are constantly moving very rapidly.

A substance has a boiling point of 90°C. What changes occur when it is heated from 50°C to 120°C?

• energy of particles increase; attractive forces decrease

• energy of particles decrease; attractive forces increase

• energy of particles increase; attractive forces increase

• energy of particles decrease; attractive forces decrease

Tags

NGSS.MS-PS1-4

The three states of matter are represented by diagrams X, Y and Z. Which change occurs during condensation?

• X to Y

• X to Z

• Y to X

• Z to X

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The boiling points of four different liquids are given below. The particles in the liquids have approximately the same mass. Which liquid has the weakest bonds between its particles?

• Liquid A boils at 20°C

• Liquid B boils at 30°C

• Liquid C boils at 40°C

• Liquid D boils at 50°C

Tags

NGSS.HS-PS1-3

Which statement about liquids is correct?

• They have a fixed shape and a fixed volume.

• They have a fixed shape but not a fixed volume.

• They have no fixed shape but they do have a fixed volume.

• They have no fixed shape and no fixed volume.

An ice cube is gently warmed as shown. Which process is taking place?

• Decomposition

• Dissolving

• Boiling

• Melting