Earth, Rocks and Soil

All rocks are made up of what?

• crystals 
• one or more minerals
• at least 5 kinds of minerals

what is not a trace fossil

• skull

• nest

• footprint

• shell

How could a scientist identify a rock?

• weight of rock
• temperature where it was found
• the minerals in the rock

Which rock is formed by heat and pressure?

• igneous
• sedimentary
• metamorphic

The Grand Canyon is an example of what type of rock?

• sedimentary
• igneous
• metamorphic 

Weathering is 

• the movement of rocks from one place to another
• the breakdown of rocks 
• the movement of dirt

How can chemical weathering wear away rocks 

• acid rain falling 
• wind blowing against the rock
• water flowing over the rock

How does deposition change the earth's surface? 

• causes earthquakes 
• building up areas of the surface
• destroying parts of the surface

Why do people use sandbags?

• to stop an earthquake
• to stop erosion 
• to stop deposition

What does the decomposition return to the soil?

• nutrients and minerals
• chemicals
• sunshine 
• photosynthesis