Water- grade 4

Question 1

What is energy?

Answer 1

The power that makes things work

Question 2

How does people use water to get food?

Answer 2

We need water to help plants, fruit and vegetables to grow. The animals also need water to drink, and for the plants that they eat to grow.

Question 3

How do mines and factories use water?

Answer 3

Mines use the water to make energy such as electricity. Factories use water for cleaning and cooling down their machines. Water is also part of many factories processes.

Question 4

Fresh water

Answer 4

Water that people an animals can drink.

Question 5

Salt water

Answer 5

Water that contains salts which are not good for most plants and animals.

Question 6

Evaporation

Answer 6

When heating changes a gas into liquid called vapor

Question 7

Resources

Answer 7

Useful things that people use and need in their lives.

Question 8

What type of water is mostly in this world?

Answer 8

Salt water from the oceans.

Question 9

What process occurs to get fresh water?

Answer 9

The process of evaporation changes salt water into fresh water.

Question 10

Where do we find fresh water naturally?

Answer 10

In lakes, rivers,wetlands,streams and also underground.

Question 11

Explain what evaporation is.

Answer 11

The sun heats the sea water and turns it into a gas called vapor. Water vapor rises, the salt stays behind.when the air cools, water vapor turns to water again and fall to the ground as rain.

Question 12

A stream.

Answer 12

A stream is rain water that collects in small channels to make streams.streams join together to make rivers.

Question 13

A lake.

Answer 13

A lake is a large area of fresh water.

Question 14

A wetland .

Answer 14

Places next to rivers and lakes that is always wet.

Question 15

Explain the different stages of the water cycle.

Answer 15

1. Evaporation
2. Presipatation
3. Condensation
4. Streams flow into rivers
5. Rivers flow downhill into sea or forms a lake.
6. Rivers return water from the land back into the sea.

Question 16

Why do people store water?

Answer 16

So they can use it later.

Question 17

How do farmers store water?

Answer 17

Farmers store their water in dams to make sure there is always water for their animals and crops.

Question 18

Name different ways people can store water.

Answer 18

Geasers
Jojo tanks
Buckets
Drums
Wells
Dams
Tanks

Question 19

How will your life change if you did not have a geezer?

Answer 19

We will not have water instantly. We would have to go fetch water, than boil it to make it hot.

Question 20

Give 4 ways people get their water.

Answer 20

Taps
Rivers
Boreholes
Water trucks

Question 21

What is the way most people get their water nowadays?

Answer 21

Through taps in their, house, yard or public taps.

Question 22

Borehole

Answer 22

A type of well, people drill boreholes in the ground to find water.

Question 23

Dam

Answer 23

An area of fresh water usually made when people build a wall across a river

Question 24

Water treatment center

Answer 24

A place where water is cleaned and made safe to drink.

Question 25

Reservoir

Answer 25

A place where clean water is stored

Question 26

Pumping station

Answer 26

Building that contains pumps that push water through water pipes

Question 27

How does water get into wells and boreholes?

Answer 27

Water soaks into the ground. The water is stored in gaps between rocks under the ground. People dig or drill holes to reach the underground water

Question 28

What is used to pump water from underground onto farms?

Answer 28

Windmill

Question 29

Write a list of ways you use water.

Answer 29

Bathing
Brushing your teeth
Washing dishes and clothes
Cooking
Cleaning the house, cars

Question 30

Difference between a wells and boreholes?

Answer 30

Wa well is hole people lower buckets into to collect water. A borehole is much deeper, people have to drill for it and use pumps to get water out of borehole.

Question 31

Why do people get water from a water truck?

Answer 31

Some areas have no rivers, boreholes or taps. Peoples get water from the truck every few days and store it.

Question 32

Put these words in the correct order.

Rain, taps, pumping station, water treatment, dams,rivers,reservoirs

Answer 32

Rain
Rivers
Dams
Water treatment
Pumping station
Reservoir
Taps

Question 33

Chemicals

Answer 33

Natural and human made substance that we use in homes, factories and farms. Some are poisonous.

Question 34

Give examples of how water is polluted.

Answer 34

1.Cleaning products from houses and villages go into rivers
They contain chemicals that make it unsafe to drink
2. People burn fuels that give off chemicals and dirt into the air. The rain washes this into the soil, rivers and dams.
3. Toilets leak into rivers. The toilet waste contains harmful bacteria.

Question 35

Give examples of how water is polluted by farms and factories.

Answer 35

Waste water from farm and factories contain harmful chemicals like the farms fertilizer or spray to kill insects. This water flows from drains or sewage into rivers and dams.

Question 36

Sewage treatment work

Answer 36

Place where polluted water is cleaned

Question 37

Filters

Answer 37

Layers of sand that trap tiny pieces of solid material

Question 38

Sewage

Answer 38

Waste that comes from toilets and drains

Question 39

Why do we need to treat sewage?

Answer 39

Sewage contains very harmful bacteria that can make us very sick.

Question 40

What do we call the process of cleaning and reusing the water?

Answer 40

Recycling water

Question 41

What is the most important reason we clean water.

Answer 41

Dirty water contains germs that cause disease.

Question 42

Where is water cleaned?

Answer 42

At a water treatment center

Question 43

Pumping stations pump water to home through what?

Answer 43

Pipes