ESS Ch. 4-5

Igneous rocks that cool quickly on Earth's surface are ________.

• always magnetic
• metamorphic
• intrusive
• extrusive

Which of these steps would be the first step in a scientific method?

• Test the hypothesis by doing an experiment.
• Analyze the data and draw a conclusion.
• Make a hypothesis.
• Identify the problem and determine what you want to know.

96% of the minerals present in Earth's crust are in which mineral group?

• oxides
• silicates
• sulfates
• carbonates

Extrusive rocks, which cool more rapidly than intrusive rocks, are generally more

• magnetic.
• finely grained.
• radioactive.
• coarsely grained.

Which of the following is NOT a test used to identify minerals?

• streak
• crystal size
• luster
• cleavage

Valuable ore deposits and gem crystals are often associated with ______________.

• oceans
• oil deposits
• thin crustal areas
• igneous intrusions

Igneous rocks that cool slowly beneath Earth's crust are

• extrusive
• intrusive
• always magnetic
• sedimentary

Ore deposits such as gold sometimes are found as a(n)

• obsidian deposit
• molten rock
• vein
• extrusion

Minerals always exist in a(n) _______ form.

• gaseous
• liquid
• organic
• solid

Minerals break along planes where atomic bonds are

• magnetic
• strong
• weak
• dense