4th Quarter Mastery Test in Science 5

A solid, non-living, and naturally occurring substance on Earth.

• mineral

• rock

• soil

• humus

1. Soil ____________________ is composed of the different horizons, namely the

   topsoil, subsoil and bedrock.

• profile

• air

• water

• oxygen

1. Wind can act as a/an ____________________ that scrapes off the rock surface

   through time.

• mechanical agent

• chemical agent

• profile

• temperature

1. Water, acids, and ____________________ can chemically change minerals in rocks.

• oxygen

• chemical

• mechanical

• wind

1. Changes in ____________________ can cause repeated expansion and contraction of

   rocks.

• air

• water

• humidity

• temperature

• The process wherein rocks are broken down due to

  chemical changes involving water, acids, and gases like oxygen. It changes the

  minerals in rocks and causes new substances to form.

• Rock

• mineral

• chemical weathering

• mechanical weathering

• The process of wearing away or breaking down of rocks into smaller

  pieces or fragments.

• weathering

• mechanical weathering

• chemical weathering

• soil formation

The lowest horizon.

• bedrock

• parent rock

• topsoil

• subsoil

It is the horizon where plants can get most of the available nutrients from minerals and organic matter.

• topsoil

• horizon

• bedrock

• parent rock

Made of loose, slightly weathered rocks, and exposed minerals with very little organic matter.

• subsoil

• topsoil

• parent rock

• bed rock