GED Science 2

Question 1

Which layer of Earth's atmosphere is responsible for absorbing most of the sun's ultraviolet (UV) radiation?

Accepted Answer

Stratosphere

Answer

The stratosphere contains the ozone layer, which absorbs 97-99% of the sun's harmful ultraviolet radiation, protecting life on Earth.

Question 2

What causes the seasons on Earth?

Accepted Answer

The tilt of Earth's axis relative to its orbit around the Sun

Answer

Earth's 23.5° axial tilt causes seasons. When the Northern Hemisphere is tilted toward the Sun, it experiences summer; when tilted away, it experiences winter.

Question 3

The rock cycle includes three main rock types. Which of the following correctly describes how igneous rock forms?

Accepted Answer

From molten magma that cools and solidifies

Answer

Igneous rock forms when molten rock (magma underground, lava at the surface) cools and solidifies. Examples include granite and basalt.

Question 4

What evidence best supports the theory of plate tectonics?

Accepted Answer

The complementary shapes of continents and matching fossils across oceans

Answer

The matching coastlines of continents (like South America and Africa), identical fossils on opposite sides of oceans, and similar rock formations provide strong evidence that continents were once joined.

Question 5

Which phase of the Moon occurs when the Moon is between Earth and the Sun?

Accepted Answer

New Moon

Answer

During a New Moon, the Moon is between Earth and the Sun. The Sun illuminates the far side of the Moon, so from Earth, the Moon appears dark (not visible).

GED Practice Test

GED Practice Test

GED Science 2