Geology

What is soil made of?

• Water, air, organic vegetables

• Water, air, organic matter and minerals from rocks.

• Water, minerals from rocks

• Dirt, organic matter and water

Soil can be...

• Salty, silty or clay-based

• Salty, vinegary or clay-based

• Clay-based or silty

• very dirty

The main layers of soil are:

• Humus, topsoil, parent material, bedrock

• Humus, topsoil, subsoil, child material, bedrock

• Humus, topsoil, subsoil, parent material, bedrock

• Organic matter, dirt, rock

Sedimentary rock is formed...

• when magma cools and solidifies.

• by pressure deep under the Earth's surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

• when sediment is compressed over a long period of time before consolidating into solid layers of rock.

Igneous rock is formed...

• when magma cools and solidifies.

• by pressure deep under the Earth's surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

• when sediment is compressed over a long period of time before consolidating into solid layers of rock.

Metamorphic rock is formed...

• when magma cools and solidifies.

• by pressure deep under the Earth's surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

• when sediment is compressed over a long period of time before consolidating into solid layers of rock.

Igneous rocks can be identified by...

• visible rocks, sand and pebbles.

• crystals or ribbon-like layers.

• gas bubbles or glassy appearance.

Metamorphic rocks can be identified by...

• visible rocks, sand and pebbles.

• crystals or ribbon-like layers.

• gas bubbles or glassy appearance.

Sedimentary rocks can be identified by...

• visible rocks, sand and pebbles.

• crystals or ribbon-like layers.

• gas bubbles or glassy appearance.