Water and air
on Earth
PLANTS

ANIMALS

ALL
LIVING
THINGS
NEED
WATER

PEOPLE
NO
COLOUR

NO SMELL

WHAT’S
WATER
LIKE?

NO TASTE
All living things need water and air to
live.
•

It is found in three STATES

SOLID

LIQUID

GAS

Water changes state when...
The three forms of water
•

You can find water in 3 different forms:
–
–
–

Liquid
Solid
Gas

Water is a liquid.

Ice is a...
DOES WATER CHANGE?
•

•

•

Water turns to GAS when it is HOT.

Water turns to SOLID when it is VERY
COLD.

Water turns to...
DOES WATER CHANGE?
It melts

It freezes

It evaporates

It condenses
Water
•
•
•
•
•
•

We need water for drinking.
We need water for swimming.
We need water for cooking.
We need water for cl...
CLEANING
WASHING

SWIMMING

USES OF
WATER
DRINKING

COOKING

WATERING
THE
PLANTS
USES OF
WATER
WATER AND LAND
•
•
•

The Earth is covered with WATER and LAND.
There is more water than land on the Earth!
We can find wa...
We can find water in

•

A lake.
– A river.
– In a waterfall.
– The clouds.
– The seas.
– Groundwater.
– Reservoirs.
– The...
Where we
find waterter
water
We find water in a
lake.

We find water in a river.

We find water in a
waterfall.

We find water in the clouds

.
We find water in the sea.
We find water in the icecaps.

We find water in reservoirs.
We find groundwater.
FRESHWATER
•

Most of the water on Earth is
– Saltwater.

•

Only a little is
– Freshwater.
FRESHWATER

SALTWATER
Oceans and seas are saltwater.

Rivers, lakes, icecaps, groundwater and reservoirs are freshwater.
WATER
HERE IS
LIQUID.

WATER
HERE IS
GAS.

WATER
HERE IS
SOLID.
ALL ABOUT AIR
•

Air is a mixture of gases.

•

We cannot see air but it is all around us.

•

•

People and animals breat...
•

•

Plants can’t grow without air.

People and animals can’t breathe without
air.
AIR IS FOUND IN THE ATMOSPHERE.

Atmosphere is the layer of gases that sorround the
Earth
Characteristics of air
•

•

Air is a mixture of gases, but it consists
mainly of OXYGEN and NITROGEN.
As water it has NO ...
WIND
•
•
•
•

•
•

Wind is moving air.
Hot air goes up
Cold air goes down.
The difference in temperature causes
wind.
Wind...
Types of wind
•
•
•
•

No wind
Little wind
Strong wind
Very strong wind

•
•
•
•

Calm
Breeze
Gale
Hurricane
An anemometer measures how fast the
wind is moving.

A weather vane tells us wind direction
Weather
•

Weather is the state of the atmosphere at
a certain time in certain places.
The weather can be windy.

The weather can be sunny.

The weather can be cloudy.
The weather can be rainy.
The weather can be stormy.

The weather can be snowy.

The weather can be foggy.
What’s the weather like today in
Spain?
Temperatures and Precipitation
•

•

When the weather is HOT, the
temperature is HIGH.

When the weather is COLD, the
temp...
PRECIPITATION
•

•
•
•
•

Precipitation is water falling from the
atmosphere to the ground.
It can be:
LIQUID ---------RAI...
Measuring weather
•

ANEMOMETER: WIND SPEED

•

RAIN GAUGE: RAIN FALL

•

TEMPERATURE: THERMOMETER.
FRESHWATER
•

•

We can only drink CLEAN freshwater. We
call this DRINKING WATER.

Water from rivers and lakes is NONDRINK...
DON’T WASTE WATER
•
•

We must save water.
Only the 3% of all the water on Earth is
freshwater.
The drought
•

•

When it doesn´t rain for a long time it’s
difficult for the plants and fish to survive.
They usually hap...
WATER CYCLE
What is the water cycle?
•

The water cycle is a continuous process of
EVAPORATION, CONDENSATION,
PRECIPITATION and COLLEC...
The water cycle
•
•

•
•

When it is hot Water from the sea evaporates.
The water vapour condenses into tiny drops and
for...
Evaporation
When the water turns into a gas
Condensation
Precipitation
COLLECTION
Water on Earth is always changing
state and place. The water cycle.
EVAPORATION
•

When the Sun heats water, water vapour
rises.
CONDENSATION
•

When the water vapor cools, it turns into
water drops and form clouds.
PRECIPITATION
•

The wind moves the clouds. When the
clouds cool, water from the clouds falls as
rain. If it is very cold,...
COLLECTION
•

The water that falls to the ground eventually
goes into rivers. It can travel to the rivers across
the surfa...
•

Now the cycle
begins again.
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Unit 7 water and air

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Unit 7 water and air

  1. 1. Water and air on Earth
  2. 2. PLANTS ANIMALS ALL LIVING THINGS NEED WATER PEOPLE
  3. 3. NO COLOUR NO SMELL WHAT’S WATER LIKE? NO TASTE
  4. 4. All living things need water and air to live. • It is found in three STATES SOLID LIQUID GAS Water changes state when you heat it or cool it.
  5. 5. The three forms of water • You can find water in 3 different forms: – – – Liquid Solid Gas Water is a liquid. Ice is a solid at 0 degrees. Water vapour is a gas at a hundred degrees
  6. 6. DOES WATER CHANGE? • • • Water turns to GAS when it is HOT. Water turns to SOLID when it is VERY COLD. Water turns to liquid at ROOM TEMPERATURE.
  7. 7. DOES WATER CHANGE? It melts It freezes It evaporates It condenses
  8. 8. Water • • • • • • We need water for drinking. We need water for swimming. We need water for cooking. We need water for cleaning. We need water for washing. We need water for watering the plants.
  9. 9. CLEANING WASHING SWIMMING USES OF WATER DRINKING COOKING WATERING THE PLANTS
  10. 10. USES OF WATER
  11. 11. WATER AND LAND • • • The Earth is covered with WATER and LAND. There is more water than land on the Earth! We can find water is many different places. Most of the water is salty.
  12. 12. We can find water in • A lake. – A river. – In a waterfall. – The clouds. – The seas. – Groundwater. – Reservoirs. – The icecaps. –
  13. 13. Where we find waterter water
  14. 14. We find water in a lake. We find water in a river. We find water in a waterfall. We find water in the clouds .
  15. 15. We find water in the sea. We find water in the icecaps. We find water in reservoirs. We find groundwater.
  16. 16. FRESHWATER • Most of the water on Earth is – Saltwater. • Only a little is – Freshwater.
  17. 17. FRESHWATER SALTWATER
  18. 18. Oceans and seas are saltwater. Rivers, lakes, icecaps, groundwater and reservoirs are freshwater.
  19. 19. WATER HERE IS LIQUID. WATER HERE IS GAS. WATER HERE IS SOLID.
  20. 20. ALL ABOUT AIR • Air is a mixture of gases. • We cannot see air but it is all around us. • • People and animals breathe oxygen from the air. All living things need air to live.
  21. 21. • • Plants can’t grow without air. People and animals can’t breathe without air.
  22. 22. AIR IS FOUND IN THE ATMOSPHERE. Atmosphere is the layer of gases that sorround the Earth
  23. 23. Characteristics of air • • Air is a mixture of gases, but it consists mainly of OXYGEN and NITROGEN. As water it has NO SMELL, NO TASTE, AND NO COLOUR NITROGEN OXYGEN
  24. 24. WIND • • • • • • Wind is moving air. Hot air goes up Cold air goes down. The difference in temperature causes wind. Wind moves air from one place to another. This is why clouds move.
  25. 25. Types of wind • • • • No wind Little wind Strong wind Very strong wind • • • • Calm Breeze Gale Hurricane
  26. 26. An anemometer measures how fast the wind is moving. A weather vane tells us wind direction
  27. 27. Weather • Weather is the state of the atmosphere at a certain time in certain places.
  28. 28. The weather can be windy. The weather can be sunny. The weather can be cloudy. The weather can be rainy.
  29. 29. The weather can be stormy. The weather can be snowy. The weather can be foggy.
  30. 30. What’s the weather like today in Spain?
  31. 31. Temperatures and Precipitation • • When the weather is HOT, the temperature is HIGH. When the weather is COLD, the temperature is LOW.
  32. 32. PRECIPITATION • • • • • Precipitation is water falling from the atmosphere to the ground. It can be: LIQUID ---------RAIN DROPS SOLID -------------- SNOW FLAKES BALLS OF ICE --------- HAIL STONES
  33. 33. Measuring weather • ANEMOMETER: WIND SPEED • RAIN GAUGE: RAIN FALL • TEMPERATURE: THERMOMETER.
  34. 34. FRESHWATER • • We can only drink CLEAN freshwater. We call this DRINKING WATER. Water from rivers and lakes is NONDRINKING WATER.
  35. 35. DON’T WASTE WATER • • We must save water. Only the 3% of all the water on Earth is freshwater.
  36. 36. The drought • • When it doesn´t rain for a long time it’s difficult for the plants and fish to survive. They usually happen in summer.
  37. 37. WATER CYCLE
  38. 38. What is the water cycle? • The water cycle is a continuous process of EVAPORATION, CONDENSATION, PRECIPITATION and COLLECTION
  39. 39. The water cycle • • • • When it is hot Water from the sea evaporates. The water vapour condenses into tiny drops and form clouds. When the clouds are cold, it rains or snow. The rain or snow falls into the sea.
  40. 40. Evaporation When the water turns into a gas
  41. 41. Condensation
  42. 42. Precipitation
  43. 43. COLLECTION
  44. 44. Water on Earth is always changing state and place. The water cycle.
  45. 45. EVAPORATION • When the Sun heats water, water vapour rises.
  46. 46. CONDENSATION • When the water vapor cools, it turns into water drops and form clouds.
  47. 47. PRECIPITATION • The wind moves the clouds. When the clouds cool, water from the clouds falls as rain. If it is very cold, the water freezes and falls as snow. Rain and snow are both types of precipitation.
  48. 48. COLLECTION • The water that falls to the ground eventually goes into rivers. It can travel to the rivers across the surface of the Earth or underground. Rivers take the water back to the ocean and seas.
  49. 49. • Now the cycle begins again.

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