1. Water on Earth The “Blue Planet”

2. Key Concepts: 1.How do people and other living things use water? 2.How is Earth’s water distributed? 3.How does Earth’s water move through the water cycle?

3. Key Terms: Photosynthesis – is the process by which plants use water, along with carbon dioxide and energy from the sun, to make their own food. Habitat – the place where it lives and obtains all the things it needs to survive. Groundwater – water that fills the cracks and spaces in underground soil and rock layers

4. Water cycle – water moving from bodies of water, land, and living things on Earth’s surface to the atmosphere and back to the Earth’s surface. Transpiration – water given off through the leaves as water vapor Precipitation – Water that falls to the Earth as rain, snow, or sleet.

5. All living things need water.

6. All Living Things Need Water What do these things have in common? They are all made mostly of WATER Water makes up nearly two thirds of your body’s mass.

7. As part of their daily routine, these women in Pakistan must walk to a well to get their water. What can you infer about the availability of fresh water in the region where they live.

8. Body Processes All living things need water in order to carry out their body processes. In addition, many living things use water for shelter. They find water to survive where it lives, their “habitat”, the place that provides all the things it needs to survive. How do organisms use water? Obtain chemicals from their surroundings Break down food Grow Reproduce Move food through their body

9. How do humans and other animals get their water? Drink it Eat other foods Eat other animals Animals can live weeks without food, but only a few days without water.

10. Plants and other organisms that make their own food also need water. This process is called “photosynthesis” 6H 2 O + 6CO 2 yields C 6 H 12 O 6 (sugar) + 6O 2 +energy Photosynthesis is the process by which plants use water, along with carbon dioxide and energy from the sun, to make their own food.

11. Animals and other organisms depend on the food made by plants during photosynthesis. Animals either eat the plants, or eat the animals that eat the plants. This occurs in both saltwater and freshwater.

12. Water also provides some animals a place to live……….it’s “habitat”.

13. What is a habitat? A. a well that contains water B. the process by which plants make their own food C. a body process that requires water D. the place where an organism lives

14. Distribution of Earth’s Water 97% of Earth’s water----is salt water found in the oceans Only 3% is fresh water Of the 3%....75% is frozen and unusable 24.9% is underground a tiny fraction is in rivers and lakes an even smaller fraction is water vapor

15. Oceans The ocean is really one BIG ocean….all of the oceans are connected!

16. The 3% left is located mostly at the North and South Poles. Unusable

17. True or False: Icebergs are formed from frozen salt water. False. Ice made from saltwater is actually a form of “desalination.” This is the separation of salt from water. Where else is desalination used?

19. Groundwater – spread out and hard to get to. Groundwater is water that fills the cracks and spaces in underground soil and rock layers.

20. Rivers and Lakes – 20% of all the freshwater in lakes are located in the Great Lakes

21. Parts of the Water Cycle

22. The water cycle naturally recycles water. It is powered by the energy from the sun and is an ongoing process. The water cycle involves all living things, as living things breath out water, and humans use water in all parts of their life. Remember from Section 1 that water evaporates from the surface of the water.

23. For millions of years, the total amount of water on Earth has remained fairly constant----rates of evaporation and precipitation are balanced.

24. Active Art self quiz phschool.com Cfp-4024

25. Transpiration – water loses water through the leaves as water vapor…..yes, you could do this.

26. Review How do people and other living things use water? Body processes Shelter Break down food Grow Reproduce Move substances within their body

27. How is Earth’s water distributed? Oceans Lakes and Rivers Ice Groundwater

28. How does water move through the water cycle? Evaporation from oceans, lakes, plants Condensation Precipitation Surface runoff from groundwater/rivers