Show:
Earth
Earthquakes
Geology
Volcanoes and Geologic Time
Miscellanous
100

Which layer of planet earth is the hottest?

The core

100

What happens when 2 plates move, stick, and release causing a jolt of the earth's crust?

An earthquake

100
A dense ball inside the earth that is made mostly of two metals, iron and nickel.
What is the core?
100
After a volcanic eruption these would cause a person not to breathe.
What is ash and gas?
100

A vent, crater, magma chamber, and conduit are parts of _____.

a volcano

200

Tectonic plates move about __________ distance per year.

One or a few centimeters a year

200
A break in the crust along which rocks move.
What is a fault?
200
The thickest layer of the planet that is made of solid rock and some is melted.
What is the mantle?
200

When the mountain falls into the empty magma chamber this is formed.

Volcanic crater

200

The first complex ocean animals (such as jellyfish) first appeared on the planet during which era? 

Precambrian Era, 500-600 million years ago

300
This is the point on the surface that is right above the focus of an earthquake.
What is an epicenter?
300
The vibration, or shaking of Earth's crust.
What is an earthquake?
300
These are continent size slabs that move slowly across Earth's surface on a thin layer of partly melted mantle.
What is plates?
300
This is melted rock that is inside the Earth.
What is magma?
300

When plates move toward each other, crashing into one another in slow motion (which can form mountains), it's called a __________ plate boundary

convergent
400
When two plates move toward each other they make two things.
What are mountains and volcanoes?
400
California has so many earthquakes because of this.
What is the San Andres fault?
400

When tectonic plates move away from each other, it's called a ______ plate boundary.

Divergent

400

In which geologic ERA are we currently living?

Cenozoic Era (in the quaternary period)

400

Name the three types of volcanoes.

Shield, Composite, and Cinder-cone volcanoes

500

How old is Planet Earth?

Approximately 4.5 billion years old

500

What causes the tectonic plates to move? 

Heat! Magma in the mantle rises up and then moves downward again, causing a circular pattern of movement underneath the crust which pushes / pulls the plates slowly. 

500

When two tectonic plates move past each other in opposite directions, scraping together as they go, it is called a ____________ plate boundary.

Transform

500

Which is longer: an era or a period of geologic time?

An era is longer than a period.

500

In which time period did mammals first appear on the planet?

Late in the Triassic period, alongside some species of dinosaurs