GED Science Test #7 4

Question 1

Which type of rock is formed when molten magma cools and solidifies?

Accepted Answer

Igneous rock

Answer

Igneous rocks form when magma cools and crystallizes, either underground (intrusive) or at the surface after a volcanic eruption (extrusive).

Question 2

A cell membrane is described as 'selectively permeable.' What does this mean?

Accepted Answer

It allows some substances to pass through while restricting others

Answer

A selectively permeable membrane regulates which substances can enter and exit the cell, allowing essential molecules like water and oxygen to pass while restricting others.

Question 3

The Richter scale measures earthquake magnitude. Each whole number increase on the scale represents how much more ground motion?

Accepted Answer

10 times more

Answer

The Richter scale is logarithmic, meaning each whole number increase represents 10 times more ground motion amplitude than the previous number.

Question 4

Which of the following is an example of a renewable energy source?

Accepted Answer

Wind energy

Answer

Wind energy is renewable because it is continuously replenished by natural atmospheric processes, unlike fossil fuels which take millions of years to form.

Question 5

In a food web, what would most likely happen if all the producers were suddenly removed?

Accepted Answer

All consumer populations would eventually decline and collapse

Answer

Producers convert solar energy into chemical energy that supports all other trophic levels; removing them eliminates the energy base of the entire food web.

GED Practice Test

GED Practice Test

GED Science Test #7 4