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Essential Natural Science 1 Unit 9 CONTENTS RESOURCES LINKS HOMERESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS ACTIVITY.

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Presentation on theme: "Essential Natural Science 1 Unit 9 CONTENTS RESOURCES LINKS HOMERESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS ACTIVITY."— Presentation transcript:

1 Essential Natural Science 1 Unit 9 CONTENTS RESOURCES LINKS HOMERESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS ACTIVITY

2 Essential Natural Science 1 Unit 9 Contents The Hydrosphere Water on Earth Distribution Origin Properties Natural disasters Sea water Properties Movements Fresh water Distribution Uses of water Uses and saving water Drinking water Water pollution The water cycle Processes HOME RESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS

3 Essential Natural Science 1 Unit 9 HOME Resources Distribution of water on Earth Origin of the hydrosphere What are some properties of water? What is sea water like? Natural disasters produced by water Movements produced in the oceans Where is fresh water found? What is the water cycle? What is water used for? Drinking water What causes water pollution? HOMERESOURCESCONTENTS CLOSEBACK Links ACTIVITYLINKS Activity: water cycle Water cycle activity

4 Essential Natural Science 1 Unit 9 Distribution of water on Earth HOME CLOSEBACK Total water on Earth sea water 97 % fresh water 3 % Total fresh water ice 68.7% surface water (liquid) 0.3% other 0.9% groundwater 30.1% lakes 87 % swamps 11% Total surface fresh water (liquid) rivers 2% ACTIVITYLINKSRESOURCESCONTENTS

5 Essential Natural Science 1 Unit 9 Primitive atmosphere: carbon dioxide water vapour Origin of the hydrosphere IS THERE WATER ON OTHER PLANETS? 4,500 million years ago Present condensation gaseous water liquid water solid water HOMERESOURCESCONTENTS CLOSEBACK Temperature 15 ºC ACTIVITYLINKS

6 Essential Natural Science 1 Unit 9 Water on other rocky planets HOMERESOURCESCONTENTS CLOSEBACK MercuryVenusMars GO BACK ACTIVITYLINKS

7 Essential Natural Science 1 Unit 9 Water on other rocky planets HOMERESOURCESCONTENTS CLOSEBACK Ice may exist in craters at the poles according to radar. MercuryVenusMars GO BACK ACTIVITYLINKS

8 Essential Natural Science 1 Unit 9 Water on other rocky planets HOMERESOURCESCONTENTS CLOSEBACK Frozen water under the polar caps Liquid water in the past MercuryVenusMars GO BACK ACTIVITYLINKS

9 Essential Natural Science 1 Unit 9 Water on other rocky planets HOMERESOURCESCONTENTS CLOSEBACK No surface water Traces of water vapour in the atmosphere MercuryVenusMars GO BACK ACTIVITYLINKS

10 Essential Natural Science 1 Unit 9 What are some properties of water? It absorbs a lot of heat.It is highly cohesive and adhesive. It expands on freezing.It is an excellent solvent. HOMERESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS

11 Essential Natural Science 1 Unit 9 Natural disasters produced by water Flash flooding Torrential rain River flooding Tsunamis HOMERESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS

12 Essential Natural Science 1 Unit 9 87 % It is salty. It contains dissolved gases from: - wave action - the activity of aquatic plants and animals Temperature varies with depth. What is sea water like? Proportions of dissolved salts chlorides HOMERESOURCESCONTENTS CLOSEBACK 2 % others 11 % sulphates ACTIVITYLINKS

13 Essential Natural Science 1 Unit 9 Movements produced in the oceans Ocean currents HOMERESOURCESCONTENTS CLOSEBACK Waves Cause Tides Cause ACTIVITYLINKS

14 Essential Natural Science 1 Unit 9 Movements produced in the oceans HOMERESOURCESCONTENTS CLOSEBACK The wind Waves Cause Tides Cause Ocean currents Cause ACTIVITYLINKS

15 Essential Natural Science 1 Unit 9 Movements produced in the oceans HOMERESOURCESCONTENTS CLOSEBACK Gravitational attraction of the Moon and Sun on the water Waves Cause Tides Cause Ocean currents Cause ACTIVITYLINKS

16 Essential Natural Science 1 Unit 9 Movements produced in the oceans Winds Differences in temperature Differences in salinity HOMERESOURCESCONTENTS CLOSEBACK Waves Cause Tides Cause Ocean currents Cause ACTIVITYLINKS

17 Essential Natural Science 1 Unit 9 Where is fresh water found? Lakes Groundwater RiversStreams or torrents WetlandsGlaciers HOMERESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS

18 Essential Natural Science 1 Unit 9 What is the water cycle? water storage in ice and snow ENLARGE IMAGE precipitation evaporation condensation in the form of clouds surface runoff evapotranspiration infiltration HOMERESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS

19 Essential Natural Science 1 Unit 9 What is the water cycle? permeable rock groundwater HOMERESOURCESCONTENTS CLOSEBACK water storage in ice and snow precipitation evaporation condensation in the form of clouds surface runoff evapotranspiration infiltration ACTIVITYLINKS

20 Essential Natural Science 1 Unit 9 What is the water cycle? HOMERESOURCESCONTENTS CLOSEBACK water storage in ice and snow precipitation evaporation condensation in the form of clouds surface runoff evapotranspiration infiltration ACTIVITYLINKS

21 Essential Natural Science 1 Unit 9 What is the water cycle? HOMERESOURCESCONTENTS CLOSEBACK water storage in ice and snow precipitation evaporation condensation in the form of clouds surface runoff evapotranspiration infiltration Hailstone formation ACTIVITYLINKS

22 Essential Natural Science 1 Unit 9 What is water used for? Agriculture Furrow irrigation Sprinkler irrigation Drip irrigation HOMERESOURCESCONTENTS CLOSEBACK Industry Domestic use What can I do to save water? ACTIVITYLINKS

23 Essential Natural Science 1 Unit 9 What is water used for? HOMERESOURCESCONTENTS CLOSEBACK Fix leaks and use water saving devices. Wash full loads of clothes and dishes. Take showers. Turn off taps. What can I do to save water? GO BACK ACTIVITYLINKS

24 Essential Natural Science 1 Unit 9 Drinking water 1. Water supply 2. Prefiltration 3. Decantation and filtration 4. Chlorination and dechlorination 5. Pumping and distribution HOMERESOURCESCONTENTS CLOSEBACK WHO guidelines for water quality ACTIVITYLINKS

25 Essential Natural Science 1 Unit 9 3. Decantation and filtration Drinking water 1. Water supply 2. Prefiltration 4. Chlorination and dechlorination HOMERESOURCESCONTENTS CLOSEBACK no toxic substances specific proportions of gases and salts clear, odourless, tasteless GO BACK WHO Guidelines WHO guidelines for water quality 5. Pumping and distribution ACTIVITYLINKS

26 Essential Natural Science 1 Unit 9 What causes water pollution? What can you do? HOMERESOURCESCONTENTS CLOSEBACK Waste water from industry, agriculture and domestic use Water pollution Fertilizers and pesticides Oil spills Deposit rubbish in bins Recycle batteries Do not throw paint, oil or solvents down the drain or toilet ACTIVITYLINKS

27 Essential Natural Science 1 Unit 9 What causes water pollution? Water pollution Waste water from industry, agriculture and domestic use Fertilizers and pesticides Oil spills What can you do? Deposit rubbish in bins. Do not throw paint, oil or solvents down the drain or toilet. Recycle batteries. HOMERESOURCESCONTENTS CLOSEBACK ACTIVITYLINKS

28 Essential Natural Science 1 Unit 9 Activity: Water cycle HOME RESOURCESCONTENTS CLOSEBACK GO TO WEBSITE Water cycle activity ACTIVITYLINKS

29 Essential Natural Science 1 Unit 9 Links HOME RESOURCESCONTENTS CLOSEBACK GO TO WEBSITE Investigating groundwater GO TO WEBSITE Hydrosphere basics ACTIVITYLINKS


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