3rd Grade Weathering, Erosion, and Soils Study Guide
Mrs. Cox CLASS Program
Terms in this set (34)
a large mass of deposited sediment at the mouth of a river
the dropping of sediment by wind, water, ice, or gravity
the movement of weathered rock material from one place to another
a large mass of slow-moving ice that flows down a slope
the slow breaking apart of wearing away of rock into smaller pieces
description of weathering
description of erosion
description of deposition
four causes of weathering
moving water, wind, ice, and growing plant roots
examples of erosion
wind moving sand from a dune, a river getting wider as the water washes dirt off the sides, and rocks falling down the waterfall as the water carries them
examples of weathering
rocks breaking apart as the waves crash into them, rocks breaking when plant roots push through them, water filling the cracks in rocks then freezing and pushing the cracks wider until the rocks break
this causes a deposition to be created at the mouth of a river
What is deposition?
effect: form deep canyons
cause: moving river water
effect: pulls soils and rocks downhill
effect: causes caves
cause: acid rain
effect: carve out mountain sides
effect: change shorelines
cause: ocean waves
How are weathering, erosion, and deposition related?
Weathering is the breaking down of rocks into smaller pieces. Erosion is what causes the smaller pieces to be moved. Finally, deposition drops or deposits these pieces into a new place.
mode up of bits of rock, minerals, and material that was part of once-living things; loose material that covers much of the Earth's surface
the decayed remains of plants and animals
the uppermost layer of soil; contains little amounts of humus
unweathered rock that lies below the subsoil
type of soil found at the beach; large particles; does not hold water wall
type of soil found in small particles, holds water well
type of soil with the smallest particles; water often puddles
type of soil that's a mixture of sand, silt, clay, and humus; many plants grow well in this type of soil
four ingredients of soil
humus, pieces of rocks and minerals, air, and water
Where would you find large amounts of humus?
in the forest
What is humus full of?
rich nutrients that help plants grow
Why is clay used to make pots?
because the water makes it sticky
What's the best type of soil for growing plants and why?
Loam, because it has good water capacity and lots of humus
the layer of soil right below the grass; this layer has the most humus
the layer of soil that contains little humus; middle layer
the layer of solid rock that lays below the subsoil