Grade 5 U2 Exploring Water and Its Properties

What is the main characteristic(特征) of particles in a solid?

• They move freely and quickly.

• They are tightly packed and vibrate（震动） in place.

• They are far apart and move randomly（随机）.

What happens to water particles during evaporation?

• They slow down and form a solid.

• They gain energy and spread apart.

• They lose energy and form a liquid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which process in the water cycle involves water vapor cooling and changing into liquid water?

• Evaporation

• Condensation

• Precipitation

Tags

NGSS.MS-ESS2-4

What is the boiling point of water at sea level?

What is the melting point of water at sea level?

What is the freezing point of water at sea level?

Which of the following best describes a gas?

• Particles are tightly packed and vibrate in place.

• Particles are far apart and move freely.

• Particles are fixed in a rigid structure.

Tags

NGSS.MS-PS1-4

How does the boiling point of water change as sea level rises（升高）?

• It increases.

• It decreases.

• It stays the same.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is an example of pollution?

• Planting trees

• Recycling paper

• Dumping chemicals into a river

• 

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

What is the main characteristic of particles in a liquid?

• They are tightly packed and vibrate in place.

• They are far apart and move freely.

• They are close together but can move past each other.

Tags

NGSS.MS-PS1-4