Water cycle

The

Water Cycle

Lesson objective:

•What is the water cycle?

•The process of the water cycle

Why is there always rain?

Where did rain comes from?

What

happens to
the puddle of

water on a
hot day?

Water bodies

Rivers

Ocean

Ponds

How is cloud

formed?

EVAPORATION

water

water vapour

CONDENSATION

Fall as

precipitation

cloud

More clouds

Larger clouds

PRECIPITATION: Water returns
to Earth in the form of rain,
snow, hail etc.

Water vapour evaporates to
form water vapour

Water vapour cools and
condenses to form clouds

Water on Earth

Clouds

PRECIPITATION

Water Vapour

evaporation

condensation

Droplets
become

big and
heavy

and fall

Made up of water
droplets (liquid)

Eg: rain, snow,

hail

Describe the water cycle.

• Water on Earth gains heat from the Sun and evaporates

into water vapour.

• As the water vapour rises into the sky, it loses heat and

condenses back into water droplets to form clouds.

• When the water droplets in the clouds get heavier, they

eventually fall back onto Earth as precipitation as rain.

• The rain will then collect into water bodies such as the

seas, rivers and lakes.

• The cycle repeats again when the water evaporates.

Water Cycle
Find It! Quiz

Hints

Answer

A substance that is very
important to us. We need it
to live, and it covers over
two thirds of the surface of
the Earth.

Water

A process in which liquid
water turns into water
vapour.
Evaporation

A fluffy-looking object in the
sky that contains tiny water
droplets or ice particles. It is
formed when water vapour
condenses.

Clouds

Match

Match the following

• This type of precipitation is water that falls from clouds in a liquid state.

• This type of precipitation is water that falls from clouds in a fluffy, frozen state.

• The process in which water circulates from the oceans to the clouds to the land to the rivers, and then accumulates back into the oceans.

• A fluffy-looking object in the sky that contains tiny water droplets or ice particles. It is formed when water vapour condenses.

Water Cycle

Rain

Cloud

Snow

• Water Cycle

• Rain

• Cloud

• Snow

Multiple Choice

When water vapor is cooled and forms droplets of liquid water

• Condensation

• Evaporation

• Transpiration

• Runoff

Multiple Choice

Precipitation occurs because 

• the droplets evaporate in the air
• the droplets are too light for the air to hold
• the droplets are too heavy for the air to hold

Multiple Choice

When water turns into a gas

• condensation 
• evaporation
• precipitation

Multiple Choice

What is condensation?

• The part of the water cycle when the sun heats up water, turning it from a liquid into water vapor or steam. It rises from the ground into the air.
• The part of the water cycle when the water vapor in the air gets cold. The water turns back into a liquid and forms clouds.
• The part of the water cycle when clouds get heavy and can no longer hold the liquid water. This causes the water to fall from the sky to the earth as rain, snow, sleet, or hail.

Multiple Choice

What is evaporation?

• The part of the water cycle when the sun heats up water, turning it from a liquid into water vapor or steam. It rises from the ground into the air.
• The part of the water cycle when the water vapor in the air gets cold. The water turns back into a liquid and forms clouds.
• The part of the water cycle when clouds get heavy and can no longer hold the liquid water. This causes the water to fall from the sky to the earth as rain, snow, sleet, or hail.

Multiple Choice

What is water that flows in rivers and streams into the oceans and lakes?

• evaporating
• condensing
• precipitating
• runoff

Multiple Choice

On which kind of day would you expect the most evaporation from the surface of a pond?

• cold, rainy
• cold, sunny
• warm, rainy
• warm, sunny

Multiple Choice

________________ is movement of water past the soil going deep into the groundwater.

• Evaporation

• Transpiration

• Percolation

• Sublimation

Multiple Choice

____________________ is the process by which water on the ground surface enters the soil.

• Infiltration

• Percolation

• Deposition

• Condensation

Multiple Choice

__________________ is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. It is essentially evaporation of water from plant leaves.

• Transpiration

• Percolation

• Infiltration

• Plant Uptake

Multiple Choice

Water that flows across the land and enters rivers and streams. It eventually flows into lakes and the ocean.

• Transpiration

• Surface Runoff

• Deposition

• Precipitation

Multiple Choice

What happens to particles when they are heated?

• They speed up and spread out
• They slow down and compress
• They stop moving
• They move closer together and speed up

Multiple Choice

What is it called when water sticks to water?

• Cohesion

• Adhesion

• Capillary Action

• Xylem

Multiple Choice

What allows water to stick to particles of dust in the air, thereby condensing to form clouds?

• Cohesion

• Adhesion

• Dipole moment

• Phloem

Multiple Choice

How does water enter a plant?

• through the stomata

• through the roots

• by active transport in root hair cells

• by osmosis in root hair cells

Multiple Choice

This vascular tissue (tubes) is responsible for the transportation of water and minerals up from the roots to the stem then leaves

• Stomata

• Shoot

• Phloem

• Xylem

Multiple Choice

Water exits the leaf through the __.

• Stomata
• Flower
• Roots
• Phloem

Multiple Select

What ions cause hardness in water?

(all two)

• Calcium

• Sodium

• Magnesium

• Hydrogen

Multiple Choice

Select one way to reduce water use.

• wash dishes under a running tap

• install a rain barrel to downspouts

• take baths instead of showers

Multiple Choice

Wastewater from people’s homes that can be recycled and put to good use. Treated groundwater can be used to irrigate both food and non-food producing plants.

• Blackwater

• Sewage

• Greywater

• Rainwater