EARTH SCI - SA2 Reviewer 1 (Identifying rocks and minerals)

Which among the following statements are TRUE about MINERALS?

All minerals have high luster

Minerals have 5 distinct criteria that must be followed

A mineral is a rock

A rock is a mineral

All minerals have similar color

A mineral has 5 properties

Is a rock a mineral, or vice versa?

A rock is a mineral

A mineral is a rock

None of the above

Select the 5 criteria of a mineral.

Naturally occurring

Inorganic

Homogenous Solid

Definite Chemical Composition

Crystalline Structure

Organic

Manmade

Solid or Liquid

Unbalanced Chemical Equation

A rock sample has visible fossils on its surface, therefore it is a mineral.

True

False

Ice is considered as a mineral.

True

False

What is a mineraloid?

A mineral that only passes most of the criteria, except for a definite chemical composition and a crystalline structure.

A rock that passes none of the criteria, and is man-made.

Select the 5 mineral properties.

Color

Taste

Cleavage

Smell

Luster

Streak

Hardness

Texture

A sheet of glass (5.5 DPH) is used to determine the _______ of a rock sample. What property is shown here?

Color

Streak

Luster

Hardness

Cleavage/Fracture

A student analyzes a sample of hematite. He notices that it has a rough, irregular shape. What property is shown here?

Color

Streak

Luster

Hardness

Cleavage/Fracture

When obsidian is placed under a light and moved around, it reflects the light and shines. What property is shown here?

Color

Streak

Luster

Hardness

Cleavage/Fracture

A sample of sulfur is scraped on two ceramic plates of different colors (black and white). The scraped line it left is more visible on the black plate. What property is shown here?

Color

Streak

Luster

Hardness

Cleavage/Fracture

This property is not the most reliable when identifying rock samples.

Color

Streak

Luster

Hardness

Cleavage/Fracture

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