Earth Science: ES 4&5

A geologist studying volcanic activity is collecting rocks that formed from hot, molten magma. What type of rock is the geologist collecting?

• Clastic Sedimentary

• Metamorphic

• Chemical Sedimentary

• Igneous

Which is a characteristic of all nonfoliated metamorphic rocks?

• Presence of fossils
• Cleavage planes
• Lack of banding
• Metallic luster

The cleavage properties of mica result from the —

• alternating layers of silica and aluminum
• weak bonds between flat layers
• strong covalent bonds within dense carbon clusters
• metallic bonds between all elements present

Which mineral is most likely an ingredient used in baby powder?

• Graphite
• Pyrite
• Corundum
• Talc

Students on a geology field trip will identify minerals by their streak. Which of these should the students bring on the field trip?

• A long, pointed iron rod
• A rough, white ceramic tile
• A disposable sample of talc
• A low-powered telescope

When a river flows into a lake, the velocity of the water decreases. Which sediments will most likely be in the numbered locations (1 to 3)?

• Sand grains, clay sized particles, large gravel
• Clay sized particles, large gravel, sand grains
• Clay sized particles, sand grains, large gravel
• large gravel, sand grains, clay sized particles

In the gold rush of 1849, prospectors found a yellow mineral that appeared to be gold, but was harder and more brittle than gold. What is this mineral that came to be called “fool’s gold”?

• Calcite
• Copper
• Sulfur
• Pyrite

Metamorphic rocks with a layered or banded look are called —

• foliated
• unfoliated
• striated
• evaporated

Obsidian, pumice, and scoria lack crystals because —

• not enough minerals were present where they formed
• they cooled too quickly
• they cooled deep inside Earth
• they cooled too slowly

The rock shown is composed primarily of large crystals that were formed by —

• cooling magma
• compacting shells
• weathering
• faulting