Semester 1 Review

Front

What is Half-life?

Back

The time required for half of the radioactive atoms in a sample to decay.

Front

What is the Half-life of an isotope that decays in 10 seconds?

Back

10 seconds.

Front

What does the theory of continental drift state?

Back

The continents were once joined in a super-continent and have moved over time.

Front

What is the electromagnetic spectrum (EMS)?

Back

The range of all types of electromagnetic radiation, ordered by wavelength.

Front

List the order of waves on the EMS from longest to shortest wavelength.

Back

Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma.

Front

What is the law of superposition?

Back

In undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top.

Front

Where are the oldest fossils typically found according to the law of superposition?

Back

Near the bottom of the rock layers.

Front

Which layer of the Earth is the hottest?

Back

Inner Core.

Front

What is the composition of the Earth's crust?

Back

The Earth's crust is primarily composed of rocks and minerals, including silicates.

Front

What is the mantle?

Back

The layer of the Earth between the crust and the outer core, composed of semi-solid rock.