Earth Science

What four elements primarily make up the earth?

• iron, oxygen, silicone, and magnesium

• silicone, hydrogen, sodium, chlorine

• potassium, hydrogen, oxygen, iron

• magnesium, gold, silver, oxygen

Topography is

• The study of the environment

• The innermost layer of the earth

• A mapping of land features like mountains and rivers

• The crust under the sea

What is moving when tectonic plates shift?

• the earth's crust

• the lithosphere

• the earth's core

• the asthenosphere

What causes earthquakes and volcanic activity?

• trees falling

• convergent plate boundaries

• fires

• divergent plate boundaries

What causes mountains to form?

• constructive plate tectonics

• storms

• floods

• wind

The cause of a rock breaking due to frozen water is an example of...

• soil formation.

• erosion.

• weathering.

Physical weathering...

• is when only the size of the rock changes.

• is when nothing changes.

• is when rock is broken into smaller pieces, and the material that makes up the rock or soil also changes.

Chemical weathering...

• is when rock is broken into smaller pieces, and the material that makes up the rock or soil also changes.

• is when only the size of the rocks is changed.

• is when nothing changes.

Weathering and erosion are processes that constantly change Earth’s surface. How do weathering   and erosion differ?

• Weathering acts quickly. Erosion acts slowly
• Weathering acts underground. Erosion acts above ground.
• Weathering breaks down materials. Erosion moves materials.
• Weathering is caused by wind. Erosion is caused by water.

The Appalachian Mountains are believed to have been as high as the Himalayas at one time. Which two processes are responsible for the fact that they are now much smaller? 

• deposition and tectonics
• erosion and tectonics 
• weathering and deposition
• weathering and erosion