1. SCIENCE GRADE FOUR – SOILS
Location
Erosion
Vocabulary:
All K-3 process vocabulary plus:
Controlled experiment
Bedrock
Clay
Erosion
Humus
Loam
Organic matter
Weathering
Soil types
Soils support growth
Soils
Essential Understandings:
Soil is the solid material on the Earth’s surface that results from the interaction of weather and biological activities with the underlying geologic formation
All soil types are made of varying amounts of sand, silt, clay and organic matter
Soils support the growth of many kinds of plants, including those in our food supply
The erosion of soil can affect the Earth’s surface