lava

a collapsed volcano

• caldera

• fumarole

• crust

Answer explanation

A collapsed volcano is known as a caldera, making it the correct choice among the options provided.

a small hole in the ground

that lets out steam and

other gases.

• crust

• fumarole

• geyser

Answer explanation

A fumarole is a small hole in the ground that lets out steam and other gases, making it the correct choice for this description.

a place where very hot

boiling water sprays

out of the ground

• volcano

• core

• geyser

Answer explanation

A geyser is a place where very hot boiling water sprays out of the ground, making it the correct choice in this context.

when a volcano

booms and throws out

hot rocks, ash, and

lava.

• eruption

• crust

• core

Answer explanation

An eruption occurs when a volcano booms and throws out hot rocks, ash, and lava, making it the correct choice.

the outer layer of the

Earth

• volcano

• crust

• core

Answer explanation

The correct choice is 'crust' as it is the outer layer of the Earth, not the core or volcano.

The very hot center of

the Earth, like a super-

heated ball.

• curst

• volcano

• core

Answer explanation

The correct choice is 'core' as it refers to the very hot center of the Earth, which is like a super-heated ball.

a mountain that can

erupt and shoot out

hot rocks, ash, and

lava.

• volcano

• Ring of Fire

• lava

Answer explanation

A mountain that can erupt and shoot out hot rocks, ash, and lava is called a volcano, making it the correct choice.

a horseshoe-shaped area

around the Pacific Ocean

where many volcanoes

and earthquakes happen.

• Ring of Fire

• magma

• lava

Answer explanation

The horseshoe-shaped area around the Pacific Ocean where many volcanoes and earthquakes happen is known as the Ring of Fire.

hot, melted rock

beneath the Earth's

surface.

• magma

• eruption

• fumarole

Answer explanation

Magma is hot, melted rock beneath the Earth's surface, making it the correct choice.

magma that comes

out of a volcano and

flows down its sides

• lava

• thermals

• Ring of Fire

Answer explanation

The correct choice is 'lava' as it is the magma that comes out of a volcano and flows down its sides.