1. Review Power Point Unit 4 Test

2. Question 1 Name 2 different ways that a volcano can impact an island ecosystem. Please remember to make these impacts about animals and their habitats, not humans and our houses. Lava can burn down trees and habitats Dust from the volcano can create a dark cloud that can last for days.

3. Question 2 Explain in complete sentences what happens when you put a bottle of water into the freezer for a few days. What happens to the water bottle? What happens to the water? The liquid water will turn solid when it freezes. The solid ice will expand and break the water bottle.

4. Question 3 If water got into the cracks of a sidewalk and then froze, what would happen to the concrete and why? Please use complete sentences. The cracks in the concrete will get bigger when the water freezes and expands.

5. Question 4 Which of the following ecoregions of Texas would be most affected by wind erosion? – Piney Woods – South Texas Brush Country – Trans Pecos – High Plains High Plains

6. Question 5 In a complete sentence please explain why you chose your answer for number 4. The high plains are flat and don’t have a lot of trees so wind can blow the dirt very easily.

7. Question 6 What type of factor could possibly cause a canyon to have steep walls and deep caves? A river has fast flowing water that can carve steep walls and deep caves in a canyon (erosion).

8. Question 7 Define the following terms in your own words: Weathering: Rocks break apart Erosion: Rocks move to a new spot Deposition: Where rocks lay down in a pile Ecoregion: The plants, animals, and land in a specific area that have similar features.

9. Question 8 For the following catastrophes explain one impact they can have on animals and their ecosystems. Please use complete sentences. Earthquake: Causes floods from tsunamis and causes faults in Earth’s crust. Drought: Water Shortage Hurricane: The high winds can pull up trees and floods can drown plants and animals.

10. Question 8 Cont… For the following catastrophes explain one impact they can have on animals and their ecosystems. Please use complete sentences. Wildfire: Wildfires burn down trees and plants and the smoke can kill animals. Flood: Floods wash out soil and drown plants and animals. Tornado: A tornado has high winds that can blow down trees.

11. Question 9 James collected 3 different types of rocks. He placed the rocks at the top of a tilted tray and pumped water on them for 3 days. What information do you think James is trying to get from this experiment? Which rocks will be weathered(broken down) by water.

12. Question 9 cont.. – Who would find the results of this experiment useful? A sculptor deciding what kind of rock to use for a sculpture. A farmer worried about the erosion of his field. The grounds keeper of a golf course deciding on the type of grass to plant Why did you choose that person? A sculptor will want to use a rock that doesn’t easily weather from rain water.

13. Question 9 cont… What is the best way for James to get the mass of each rock? Use a triple beam balance

14. Question 9 cont… What is the best way for James to set up a data table for this experiment? Rock Sample Mass 0 hours24 hours48 hours72 hours Granite Sandstone Marble

15. Question 10 Antelope are deer-like animals with long straight horns. They migrate in herds across Africa in search of the grasses they feed on. Antelope are prey for cheetah. How would a drought impact an antelope population in Africa? The antelope population will decrease because there will not be much grass or water. The antelope will have to migrate to find food and water. The cheetah population will also decrease because they will have less antelope to eat.