Classifying Rocks Assessment

What are rocks made of?

• Only a single mineral

• Mixtures of minerals and other materials

• Only organic materials

• Only water and minerals

Tags

NGSS.MS-ESS2-1

How do geologists classify rocks?

• By their weight and size

• By their mineral composition and texture

• By their age and location

• By their temperature and density

What does the texture of a rock refer to?

• The color of the rock

• The size, shape, and pattern of the rock’s grains

• The age of the rock

• The temperature of the rock

What is a characteristic of coarse-grained rocks?

• Grains are large and easy to see

• Grains are very small and require a microscope

• Grains are invisible

• Grains are made of glass

Why might some rocks have no visible grain?

• They are made of large particles

• They cooled very slowly

• They cooled very fast

• They are made of organic material

What three characteristics do geologists use to identify a rock sample?

• Color, weight, and size

• Texture, hardness, and luster

• Shape, size, and mineral composition

• Density, color, and temperature

What are the three groups into which geologists classify rocks?

• Igneous, sedimentary, and metamorphic

• Volcanic, sedimentary, and crystalline

• Igneous, volcanic, and sedimentary

• Metamorphic, crystalline, and igneous

What is a rock’s texture?

• The color of the rock

• The feel of the rock's surface

• The size and shape of the crystals in the rock

• The weight of the rock

What methods do geologists use to determine the mineral composition of a rock?

• Weighing and measuring the rock

• Using a microscope and performing tests like acid and magnetism tests

• Observing the color and texture

• Heating and cooling the rock

What is the rock cycle?

• A way to organize fossil history

• A process that preserves rocks forever

• A series of processes that change one rock type into another

• A method for dating sedimentary layers

Tags

NGSS.MS-ESS2-1