TH Science Study Guide TEST ON WEDNESDAY, NOVEMBER 12

Name: ______

Please sign and return on Wednesday ______(Parent Signature)

1. A lake is a body of water that has land all around it.

2. An ocean is a body of salt water that covers ¾ of the earth’s surface.

3. A landform that has a peak at the top and is taller than the surrounding area is a mountain.

4. A plain is a large area of flat land.

5. A low area between two mountains or two tall hills is a valley.

6. A glacier is a large mass of ice that moves very slowly.

7. Landforms are natural features of earth’s surface. TRUE or FALSE

8. A river is made up of salt water. TRUE or FALSE

9. A volcano is an opening in the earth’s crust that allows hot lava to escape from underground. TRUE or FALSE 10. Why would you need a boat or a bridge to get to an island?

You need a boat or a bridge to get to an island because an island is surrounded by water.

Know these important facts

 The Earth is always changing.

 Erosion happens when rocks or soil are moved by water or wind. (**Take it away**)

 Weathering happens when rocks change or break apart. (**Break it on down**)

 Plants and trees keep the soil from eroding.

 The roots of plants help hold soil in place.

 Another word for soil is dirt.

 Water and changes in temperature can cause sharp rocks to become smooth.

 What can be planted so soil will not erode? Plants

 What can happen when it rains a lot? Weathering

 What causes rocks to be smooth? Water and changes in temperature

***Reading Concepts to Study***  The main idea is what the story is all about.  Supporting details PROVE the main idea.

 Authors write stories for three reasons or purposes: . to Persuade . to Inform . to Entertain

 The author’s purpose is as easy as PIE!!!!