GED Science 3

Question 1

What is the primary cause of ocean tides on Earth?

Accepted Answer

The gravitational pull of the Moon (and Sun)

Answer

Earth's rotation on its axis

Answer

Wind patterns across ocean surfaces

Answer

Differences in water temperature across the ocean

Question 2

How do scientists use the half-life of radioactive isotopes to determine the age of rocks and fossils?

Accepted Answer

By comparing the ratio of parent to daughter isotopes in a sample

Answer

By measuring the temperature of the rock sample

Answer

By counting the number of fossils in each rock layer

Answer

By observing the color and texture of the rock

Question 3

What process drives the movement of tectonic plates?

Accepted Answer

Convection currents in Earth's mantle

Answer

The gravitational pull of the Moon

Answer

Earth's magnetic field

Answer

Solar radiation heating the surface

Question 4

The Hertzsprung-Russell (H-R) diagram classifies stars based on which two properties?

Accepted Answer

Temperature and luminosity (brightness)

Answer

Mass and diameter

Answer

Age and distance from Earth

Answer

Color and rotation speed

Question 5

What happens at a convergent plate boundary where oceanic crust meets continental crust?

Accepted Answer

The oceanic crust subducts beneath the continental crust, forming mountains and volcanoes

Answer

New ocean floor is created as magma rises

Answer

The continental crust subducts beneath the oceanic crust

Answer

Both plates move sideways past each other

Question 6

In which layer of Earth does the material behave like a slow-moving fluid, allowing tectonic plates to move?

Accepted Answer

Mantle

Answer

Outer core

Answer

Inner core

Answer

Crust