Soils, Rock, and Landforms Investigation 1

A solid earth material made of two or more minerals.

• gem

• humus

• mineral

• rock

Any natural resource that makes up Earth, including soil and water.

• earth materials

• conglomerate

• physical weathering

• chemical reaction

Bits of dead plant and animal parts in the soil.

• humus

• pebbles

• rocks

• gravel

The rubbing, grinding, and bumping of rocks that cause physical weathering is?

• basalt

• acid rain

• abrasion

• chemical weathering

A form of precipitation containing acid, which forms when carbon dioxide gas in the air dissolves in water droplets is?

• calcite

• chemical weathering

• physical weathering

• acid rain

When plants and animals die, their remains are called _______

• humus
• landform
• soil
• rock

_____________ makes rocks smaller but does not change the rock's minerals within it.

• humus
• soil
• physical weathering
• chemical weathering

_________________ makes rocks smaller and changes one or more of the minerals inside of the rock.

• physical weathering
• chemical weathering
• mineral
• igneous rock

Which of the following items are considered ingredients of soil?

• water

• worms

• air

• sand

• humus

Which type of weathering most likely caused the rock shapes?

• Tree roots

• Acid rain

• Freezing and thawing

• Sand blown by wind