3rd CBA Review and Practice #1

A student made a mixture of sand, tiny rocks, small twigs, and some leaves. This student has modeled...

• how rocks change over time

• the formation of soil

• the life cycle of plants

• how landforms are created

The weathering of rocks into small pieces forms what natural resources?

• Minerals

• Water

• Coal

• Soil

A student exploring the formation of soil put rocks in a plastic jar of water and shook it. Afterwards, there were small pieces of broken rock in the water. What process in the formation of soil does this model?

• Weathering of earth materials

• Decay of plant matter

• Formation of various minerals

• Mixing of water and air

How do plants contribute to the formation of soil? Plants...

• cover the soil and shade it from sunlight.

• die, decompose and become part of the soil.

• use soil to grow and develop over time.

• support the animal life in the soil.

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand
• silt
• clay
• humus

How are erupting volcanoes helpful?

• They can help clear land to build on.
• Volcanoes can shootout lava that will eventually cool down on the surface of the Earth and form new land.  
• They can keep cold areas warmer. 
• They are not helpful at all. 

What occurs when two plates move, bump or slide past each other?

• An Earthquake
• Nothing
• Movement

________ or quick changes can occur to our Earth within minutes or even seconds.

• rapid

• large

• small

• slow

When rocks and debris fall down a slope or mountain, this is called a _________.

• Landslide

• flood

• Volcano

When lots of rain falls in a day, people living in that area should watch out for -

• hurricanes
• earthquakes
• volcanoes
• landslides