Earth Science
作者:Marissa Miller
1. Natural Resources
1.1. Natural Resources
1.2. RenewableResources
1.3. Nonrenewable Resources
2. People & Resources
2.1. Conservation
2.1.1. Recycling
3. Renewable Resources
3.1. Living Things
3.1.1. Plants
3.2. Sunlight & Air
3.3. Water
3.3.1. The Water Cycle
3.3.1.1. Condensation
3.3.1.2. Precipitation
3.3.1.3. Evaporation
4. Nonrenewable Resources
4.1. Rocks
4.2. Metals
4.2.1. Copper
4.2.2. Aluminum
4.2.3. Iron
4.3. Fossil Fuels
4.3.1. Coal
4.3.2. Natural Gas
4.3.3. Oil
4.4. Soil
4.4.1. Sandy
4.4.2. Clay
4.4.3. Loam