6th Science Chap 3

The rarest, most durable and beautiful gems are called this . . .

The hardest material that composes the earths crust is called this . . .

This is the scientist that studies the structures of the earth

This metal is a good conductor of electricity.

T/F A volcano allows molten rock and hot gases to escape from within the earth.

The process by which new soil is formed as rocks crumble and break apart

T/ F Chemical weathering occurs when natural acids slowly eat into a rock.

A Volcano characterized by hot clouds of gas and dust that it expels.

Small deposits of igneous and metamorphic crystals

A break that appears at the boundary between two moving masses of rock is known as this . . .

Any trace of a plant or animal left in a rock

Any trembling or shaking of the earth's crust is defined as this . . .

A volcano this was active but it has not been active recently is called this . . .

The place at ground level that is directly above the focus of an earthquake is called this . .

The boundary between the earth's crust and its mantle

The point underground where an earthquakes begins is called this . . .

T/ F A magma chamber is created when trapped gases blast through earth's surface

The ends of a magnet are called this . . .

The area surrounding a magnet where the force of the magnet effects other objects.

A volcano that has erupted recently

The study of earthquakes is called this . . .

The magnetic field produced by the earth is called this . . .

Any rock containing a metal together with impurities

Sand and mineral fragments that have been pressed together form this type of rock

Any hollow space in the earth's crust that is large enough for a person to fit into.

The hardest known mineral. It is commonly found in volcanic pipes.

T/ F The temperature of rocks decreases with depth

Smaller fragments of molten rock that solidify almost instantly are called this . . .

A volcano that produces lava fountains or fire curtains is called this . . .

Holes or cracks which serve as escape vents for underground gases are called this . .

T/ F The Strength of an earthquake is called the magnitude.

When melted/molten rock solidifies, it forms this type of rock . . .

The underwater mountain ranges are called this . . .

A volcano that has not erupted in recorded history

Earthquakes sometimes cause very large waves called this . . .