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

Troposphere

Answer

Mesosphere

Answer

Thermosphere

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 varying distance from the Sun throughout the year

Answer

The rotation of Earth on its axis every 24 hours

Answer

Sunspot activity on the surface of the Sun

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

From layers of sediment that are compacted and cemented over time

Answer

From pre-existing rocks that are changed by heat and pressure

Answer

From organisms that die and accumulate on the ocean floor

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 Sun's gravitational pull on Earth

Answer

The daily rising and setting of the Sun

Answer

The tides in Earth's oceans

Question 5

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

Accepted Answer

New Moon

Answer

Full Moon

Answer

First Quarter

Answer

Last Quarter

Question 6

What is the greenhouse effect, and how does it affect Earth's temperature?

Accepted Answer

It warms Earth by trapping heat in the atmosphere

Answer

It cools Earth by reflecting sunlight back into space

Answer

It creates precipitation by condensing water vapor

Answer

It blocks UV rays from reaching Earth's surface