Exam 20: Earth the Active Planet

Why can't S waves travel through Earth's liquid core?

Earth's upper atmosphere is protected from infrared radiation by an ozone layer.

The region controlled by Earth's magnetic field is the _______________.

Earth's core is hot, dense, and mostly composed of iron and nickel.

Where can you find a midocean rise?

Because P waves are_______________ waves, they can move through a liquid.

Some of Earth's rocks retain traces of the magnetic field that point backward to its field today.

Internal heat forces Earth's liquid core to circulate with _______________.

What is responsible for much of the erosion of Earth's surface?

In comparing the Terrestrial planets, which planet is most similar in size to Earth?

What are the four stages of Terrestrial planet development?

List some of the geological forces and end products of plate tectonics.

Terrestrial worlds are all differentiated, which means they are separated into layers of different _______________.

Comparing and contrasting the characteristics of planets is known as _____.

Why do scientist refer to Earth's mantle as a plastic?

When an earthquake occurs, no direct _______________ pass through the core to register on seismographs on the opposite side of Earth.

Where are volcanoes most common?

The collision of plates can produce ____.

A plate sliding into a subduction zone can trigger ____.

Which element would not have been found in Earth's early atmosphere? What is the most abundant gas found in Earth's atmosphere today?