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. 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 Water vapour
0 degrees. is a gas at
a hundred degrees
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.
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. CLEANING
SWIMMING WASHING
USES OF
WATER
DRINKING COOKING
WATERING
THE PLANTS
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. Where we find water
• We can find water in
– A lake.
– A river.
– In a waterfall.
– The clouds.
– The seas.
– Groundwater.
– Reservoirs.
– The icecaps.
18. Oceans and seas are saltwater.
Rivers, lakes, icecaps, groundwater and reservoirs are freshwater.
19. WATER HERE
IS SOLID.
WATER HERE
IS LIQUID.
WATER HERE
IS GAS.
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. • Plants can’t grow without air.
• People and animals can’t breathe without air.
22. AIR IS FOUND IN THE ATMOSPHERE.
Atmosphere is the layer of gases that sorround the Earth
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. 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. Tipes of wind
• No wind • Calm
• Little wind • Breeze
• Strong wind • Gale
• Very strong wind • Hurricane
26. An anemometer measures how fast the wind is
moving.
A weather vane tells us wind direction
27. Weather
• Weather is the state of the atmosphere at a
certain time in certain places.
28. The weather can be windy.
The weather can be sunny.
The weather can be cloudy.
The weather can be rainy.
29. The weather can be stormy. The weather can be snowy.
The weather can be foggy.
31. Temperatures and Precipitation
• When the weather is HOT, the temperature is
HIGH.
• When the weather is COLD, the temperature
is LOW.
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
34. FRESHWATER
• We can only drink CLEAN freshwater. We call
this DRINKING WATER.
• Water from rivers and lakes is NON-DRINKING
WATER.
35. DON’T WASTE WATER
• We must save water.
• Only the 3% of all the water on Earth is
freshwater.
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.
38. What is the water cycle?
• The water cycle is a continuous process of
EVAPORATION, CONDENSATION,
PRECIPITATION and COLLECTION
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.
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. 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.
