Chapter 9 Minerals, Rocks and Soil

Which property describes minerals that break along smooth surfaces?

•  hardness

• color

•  fracture

• cleavage

The mineral’s powder is called its _________.

• color

•  streak

• dimensions

• crystals

From which material does an extrusive rock form?

• magma

• lava

• mineral

• sediment

A conglomerate is an example of which type of rock?

• intrusive igneous

• extrusive igneous

• sedimentary

• metamorphic

Which is the C horizon of soil made of?

• clay

• humus

• bedrock

• large rocks

Which is strip farming?

• adding fertilizer to soil

• cutting shelves in hills

• planting grasses between crop rows

• planting trees around crops

Which mineral property describes how easily a mineral can be scratched?

• streak

• hardness

•  cleavage

• reaction to acid

All are changes that happen in the rock cycle except ___________.

• magma to sedimentary rock

• igneous rock to sediments

• metamorphic rock to magma

• sediments tosedimentary rock

A student tested the hardness of four mineral samples by using each sample to scratch the others. Mineral 1 scratched Mineral 2 but would not scratched Mineral 3. Mineral 2 would not scratch any of the others. Mineral 4 scratched Mineral 3. Which list shows the mineral samples in order from softest to hardest?

• 1, 2, 3, 4

• 2, 3, 4, 3

• 2, 1, 3, 4

• 2, 4, 1, 3

Which properties are most helpful in identifying minerals?

• weight and shape

• size and ability to float

• luster and streak

• shape and color