Science test

dirt is a mixture of many different things

• true

• false

dirt and soil are the same thing

• true

• false

what happens to leaves when they drop on the ground?

• they burn

• they float away into space

• they decompose and become part of the soil

• leaves never drop onto the ground

humus is bad for the soil

• true

• false

explain how are rocks are broken down by absorbing water

how does running water help break down rock?

• the flowing water eventually breaks down the rough parts of the rock. these bits float down the stream and join other soil.

• it doesn't

• the running water destroys the pieces of rock. it does not flow downstream.

• rocks are only broken down by absorbing water.

show below what pores look like in a rock formation...

what do pores do?

• catch rainwater and turn it into carbon dioxide

• hold water and control the amount of water that flows in and out of the soil

• eat any toxic bugs found in the soil

• catch sunshine to keep the plant warm in the winter

what type of rock is this?

• metamorphic

• igenous

• sedimentary

• lava

what type of rock is this?

• igneous rock

• sedimentary rock

• metamorphic rock

• lava