Formation of Soils

Soil is composed of all of these natural materials EXCEPT

• weathered rock
• plant matter
• plastic substances
• animal remains

The organic matter in soil comes mostly from plants. Which of the following locations would most likely produce soil with the greatest amount of organic matter?

• A desert with very high temperatures
• A prairie with lots of grasses and flowers
• A mountain with extremely cold winds
• A river with quickly moving water

Which of the following processes will most likely contribute to the development of soil?

• Volcanic eruptions that make new land
• Building up of snow in very cold areas
• Migration of animals to warmer climates
• Breaking down of rock by wind, water, and ice

Plants and animals become part of soil when they -- 

• Die and Decay
• Produce offspring
• Grow and Develop
• Take in nutrients

All of the following are plant remains EXCEPT - 

• Dead leaves
• Dried twigs
• Sand Particles
• Seed covers

One component of soil is decayed plant and animal remains, but the major component of soil is - 

• Fossil Fuels
• Weathered rocks
• Iron ore
• Salt water

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

• Minerals
• Water
• Coal
• Soil

Rocks near the ocean get broken into smaller pieces. What causes this change to these rocks?

• Leaves falling from trees
• Clouds forming in the sky
• Water crashing against the rocks
• Salt dissolving in the water

Rock is broken into smaller and smaller pieces over time by all of the following EXCEPT - 

• Flowing water
• Blowing wind
• Cooling sand
• Moving Ice

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

• how rocks change over time
• the life cycles of plants
• the formation of soil
• how landforms are created