33rdrd Grade Rocks & Minerals Grade Rocks & Minerals

Mrs. Thornburg’s Vocabulary Pictures

Vocabulary Words in this UnitVocabulary Words in this Unit

Mineral Weathering

Rock Igneous Rock

Erosion Sedimentary Rock

Silt Metamorphic Rock

Sand Humus

Clay Loam

What do we call the part of the soil made up of broken-down pieces of dead plants and animals?

Humus

What do we call soil that is a mixture of humus, sand, silt, and clay?

Loam

What do we call a type of soil with very, very tiny grains of rock?

Clay

What do we call rock that was once melted and then cooled and hardened?

Igneous Rock

What do we call a rock made when materials settle into layers and get squeezed until they harden into

rock?

Sedimentary Rock

What do we call a rock that has been changed by heat or pressure?

Metamorphic Rock

What do we call the breaking down of rock into smaller pieces?

Weathering

What is a solid object found in nature that has never been alive?

Mineral

What is a naturally formed solid made of grains of one or more minerals?

Rock

What do we call the movement of weathered rock and soil?

Erosion

What do we call soil with grains of rock that you can see with your eyes only?

Sand

What do we call soil with grains of rock that are too small to see with your eyes alone?

Silt