Vocabulary 1
An underground holding pool for hot magma is called a...
magma chamber
Melted rock that flows out onto Earth's surface is...
Lava
Name the first layer of Earth. (on Earth's surface)
crust
In what type of eruption does the gas escape the volcano very easily?
Gentle Eruption
How many times stronger is a 3.0 earthquake compared to a 2.0 earthquake.
10 times stronger.
Scientists measure earthquake waves with a...
seismograph
If you somehow dug down to Earth's center, the first two layers you would pass through are the...
crust and mantle
Name the middle layer of Earth.
mantle
Mountains made of lava layers that alternate with layers of rock are called...
Composite volcanoes
The scale that is used to describe the strength of a volcano is called a what?
Richter Scale
A vibration of Earth's crust is an...
earthquake
Hot melted rock that is underground is called...
magma
Name the deepest layer of Earth.
core
Volcanoes can be useful to people who live near them because volcanoes...
add minerals to the soil, help things grow.
A break in the crust along which rocks move is a...
fault
A large basin that can form at the top of a volcano is a...
crater
another word for melted as it refers to magma is what?
Molten
What is the crust made of? (Hint: the puzzle pieces of earth)
tectonic plates
Name one sign that a volcano is about to erupt.
Small quakes
Gas release
Rise in surface
Surface temperature increase
What three things are released from a volcano?
Ash, gas and lava
Most of the magma from a volcano comes up through a rocky opening called a...
vent
The point of Earth's surface that is directly above an earthquake's focus is the...
epicenter
The constant motion of plates can lead to.... (name 2 things)
earthquakes, mountain building, volcanoes
A volcano that has not erupted in over 100,000 years is considered called what?
Extinct
Describe the process of volcanoes becoming larger.
The volcano erupts and releases lava. Once the lava cools and hardens it increases the size of the volcano.