1. Lakes & Ponds Mrs. Wisher write everything in yellow

2. Lakes & Ponds What’s the difference? Lakes are large bodies of water that are within a land mass Ponds are within land but smaller than lakes

3. What Classifies Ponds? Ponds are more shallow Sunlight reaches the bottom of ponds Ponds have muddy bottoms that support plant growth Some ponds are seasonal

4. Pond Life Algae live in ponds which produce food for other animals Frogs, small fish, snails and crayfish all live within a pond Blue-green algae

5. Ponds In many northern states, ponds will freeze during winter Fish and plant life can live under frozen water due to the warmer temperatures Why does only the surface of the pond freeze?

6. What Classifies Lakes? Lakes are deeper and larger than ponds Sunlight does not reach the bottom of lakes The bottom of lakes are either sand or rocks

7. Lake Formation Lakes can be formed from: glaciersoxbowvolcanoes reservoirs – for human use

8. Lake Habitats Close to shore, lake habitats are like ponds Few organisms live at the bottom of lakes mostly worms & mollusks Large bony fish live in the deep waters of a lake eat what floats to the bottom

9. Lake Turnover Most lakes change with the seasons Lake turnover happens in the winter when the warmer water cools and sinks to the bottom causing the water & nutrients to mix

10. Eutrophication Algae feed on waste products from other animals Over time more algae grows and covers a lake in a thick green scum which blocks out sunlight Plants die and the lake is starved of oxygen The lake becomes shallower and will eventually disappear

11. Wetland A wetland is a shallow swampy area that can sometimes evaporate during warmer weather

12. POP QUIZ!!!

13. 1. How was this lake formed?

14. 2. How was this lake formed?

15. What type of lake is this? 3. What type of lake is this?

16. 4. Name 2 features of a pond.

17. 5. In the winter, is water warmer or cooler at the bottom of a lake?

18. 1. How was this lake formed? GLACIERS!

19. 2. How was this lake formed? Volcano!

20. What type of lake is this? Reservoir! 3. What type of lake is this? Reservoir!

21. 4. Name 2 features of a pond. Shallow muddy bottoms sunlight reaches the bottom seasonal plant growth on bottom

22. 5.In the winter, is water warmer or cooler at the bottom of a lake? WARMER! WARMER!