Unit Test — Unit test Answers

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Which rock is an example of a chemical sedimentary rock?

coal

iron ore

shale

sandstone

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These minerals were formed through crystallization of molten materials.

The mineral on the left formed from lava.

The mineral on the right formed from magma.

The mineral on the left has smaller crystals than the mineral on the right.

The mineral on the left cooled more slowly than the mineral on the right.

Which describes gneiss?

igneous

formed from shells

tends to split along bands

grains randomly arranged

How is a mineral of volcanic origin with large crystals most likely formed?

crystallization through evaporation of water

crystallization of molten material inside Earth

crystallization of molten material at Earth’s surface

crystallization through cooling of a hot water solution

Study the image.

The rock has fine grains.

The grains of the rock are sharp or jagged.

The rock is banded.

The bands of the rock run from the top to the bottom.

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