1) Which layer of soil is best for growing plants? a) topsoil b) subsoil c) bedrock 2) Roots are able to grow in the bedrock layer of soil. a) True b) False 3) Which layer of soil is the deepest (furthest away from the surface)? a) topsoil b) subsoil c) bedrock 4) Which layer of soil contains the most humus? a) topsoil b) subsoil c) bedrock 5) Which layer of soil provides support for shrubs and trees with strong roots? a) topsoil b) subsoil c) bedrock 6) Soil is important because many plants grow in soil, and it provides support and nutrients for the plants. a) True b) False 7) Which layer of soil is the darkest in color? This is the layer where most plants grow. a) topsoil b) subsoil c) bedrock 8) Dark soil often contains a lot of _____, which keeps the soil healthy for plants. a) air b) water c) humus d) rock 9) Soil starts to form from ___ that have been broken down. a) air b) light c) water d) wood e) rocks f) humus 10) Soil contains many living things. a) True b) False

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