ROCKS & EARTH HISTORY REVIEW

Which statement best describes relative dating of rock layers?

• It measures how rough a rock feels

• It gives the exact age in years

• It tells which layers are older or younger

• It tests only volcanic rocks

Tags

NGSS.MS-ESS1-4

A cliff shows three rock layers. Layer A is at the bottom, B is in the middle, and C is on top. Which layer is the youngest?

• All layers are the same age

• Layer C on the top

• Layer B in the middle

• Layer A at the bottom

Tags

NGSS.MS-ESS1-4

Scientists use special tests on volcanic rocks to find the exact age of a fossil. What is this method called?

• Relative dating

• Absolute dating

• Index fossil dating

• Texture testing

Which fossil would be most helpful as an index fossil for dating rocks?

• A fossil found only in one cave

• A rare fossil that lived very long

• A common fossil that lived briefly

• A fossil with no rock layer

Tags

NGSS.MS-ESS1-4

A student feels two rocks. Rock X is smooth, and Rock Y is rough. What can the student infer about their grains?

• Smooth rock has small grains

• Rough rock has small grains

• Smooth rock has large grains

• Both rocks have the same grains

What do igneous rocks form from?

• Melted rock called magma

• Layers of sand and mud

• Pieces of other rocks

• Shells and plant remains

Which statement best describes intrusive igneous rocks?

• They cool quickly above ground

• They have tiny or no crystals

• They form from wind and water

• They cool slowly underground

Which rock type is most likely to have large crystals?

• Intrusive igneous rocks

• Extrusive igneous rocks

• Sedimentary rocks

• Metamorphic rocks

A black rock formed from lava cooled quickly at Earth’s surface. What crystal size would you expect?

• Very large crystals

• Medium-sized crystals

• Crystals of many colors

• Small or no crystals

Granite forms deep underground and cools slowly. Which classification fits best?

• Fossil-rich rock

• Sedimentary rock

• Extrusive igneous rock

• Intrusive igneous rock