Conserving Land and Soil

How do people use land?

• Agriculture, mining, and development

• To live on

• They build malls, shopping centers, and hospitals only.

• People don't use the land

What is not a layer of soil?

• Lava

• Litter

• Topsoil

• Subsoil

What is the structure of fertile soil?

• Litter, topsoil, subsoil, bedrock

• Stratosphere, ionosphere, atmosphere

• Roots, stem, leaf, flower

• Metamorphic, igneous, sedimentary rock.

How is new farmland created?

• Clearing forests, draining wetlands, and irrigating deserts

• it is exposed and can be blown or washed away more easily

• The habitats of wildlife are destroyed

• An area of trees or a forest was cut down to make space for building

What happens to the soil when it is strip mined?

• Soil is exposed and can be blown or washed away

• Habitats of wildlife are destroyed

• Clearing forests, draining wetlands and irrigating deserts

• They make space for a building

What happens to wildlife when land is developed for settlements or farmland?

• The habitats of wildlife are destroyed

• Clearing forests draining wetlands and irrigating deserts

• People make space for a building

• Land is exposed and can be blown or washed away

What is not a use for land?

• Agriculture

• Mining

• Development

• Forest fires

What does soil contain that plants need to grow?

• Minerals and nutrients

• Dirt

• Litter

• Earthworms and moles

How does soil help breakdown waste?

• Minerals and nutrients

• The very top layer of dead leaves and grass

• It contains bacteria, fungi, and other organisms that help break down waste

• Freezing thawing, acids in rainwater and chemicals released by lichens, and plant roots that wedge between rocks.

What natural processes break up bedrock?

• Freezing, thawing, acids in rainwater and chemicals released by lichens, and plant roots that wedge between rocks

• Minerals and Nutrients

• Machines and other man made tools