LESSON
States of Water
19 minutes ago by
16 slides

States of Water

Water is one of the few things that is found in nature as a solid, liquid and a gas


There are three states of matter

Solid, liquid, gas

Solid Water - Ice

  • When water freezes, it expands or gets bigger.

  • Molecules vibrate back and forth but do not move to different positions.

  • Ice floats in water because 

         it is less dense.

Liquid - Water

  • molecules move freely so sometimes they

    bump into each other.

  • most things dissolve in water which makes water the universal solvent.

  • greatest range of temperatures

    very cold water to very hot water.

Gas - Water Vapor

  • molecules move quickly and far apart.

  • water in a gas state is called water vapor.

Q.

When water freezes, does it expands (gets bigger) or contract (get smaller)?

answer choices

expands

contracts

Q.

Ice is ____ than liquid water.

answer choices

more dense

less dense

Q.

This state has the greatest range in temperatures.

answer choices

solid

liquid

gas

Q.

True or False: molecules in the liquid state vibrate back and forth but don't move positions.

answer choices

True

False

Q.

Water vapor (gas) - molecules move quickly and are far apart.

answer choices

True

False

The Water Cycle

The Sun provides the heat which can make water change from one state to another.

Evaporation

  • Evaporation - heat from the Sun makes the liquid water molecules move faster and evaporate or change into a gas.

  • Liquid to a gas.

  • Temperature increases.

Condensation

  • Condensation - water vapor molecules floating in the air cool down and change back into a liquid (clouds).

  • Gas to a liquid.

  • Temperature decreases.

Precipitation

  • Precipitation - the water drops in the cloud get bigger and bigger (cohesion) until eventually they fall as rain or snow.

Q.

Condensation is ____

answer choices

gas to a liquid

liquid to a gas

gas to a solid

Q.

Evaporation is

answer choices

gas to a liquid

liquid to a gas

solid to a gas

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