The video tutorial explains how lakes can be walked on when frozen, describes ice as the solid form of water, and discusses the transformation of water between solid, liquid, and gas forms, including water vapor.

What condition allows people to walk or skate on a lake?

• When the lake is warm

• When the lake is frozen

• When the lake is shallow

• When the lake is deep

What is the solid form of water called?

• Vapor

• Ice

• Liquid

• Steam

What happens to ice when the temperature goes above freezing?

• It solidifies

• It evaporates

• It freezes

• It melts

What is the gaseous form of water known as?

• Steam

• Liquid

• Ice

• Water vapor

Which of the following is true about water?

• It only exists as a liquid

• It cannot change forms

• It exists in multiple forms

• It only exists as a gas