GED Science Test #5 2

Question 1

What happens to atoms during a chemical reaction?

Accepted Answer

Atoms are rearranged to form new substances

Answer

Atoms are created from nothing

Answer

Atoms are destroyed

Answer

Atoms change their atomic number

Question 2

Which type of rock is formed from cooled magma or lava?

Accepted Answer

Igneous

Answer

Sedimentary

Answer

Metamorphic

Answer

Crystalline

Question 3

A cell without a membrane-bound nucleus is called a:

Accepted Answer

Prokaryote

Answer

Eukaryote

Answer

Protist

Answer

Organelle

Question 4

What is the SI unit for measuring electric current?

Accepted Answer

Ampere (A)

Answer

Volt (V)

Answer

Ohm (Ω)

Answer

Watt (W)

Question 5

The greenhouse effect occurs when:

Accepted Answer

Gases in the atmosphere trap heat radiated from Earth's surface

Answer

The sun emits extra heat toward Earth

Answer

Earth's ozone layer reflects sunlight back to space

Answer

Plants absorb too much CO₂ from the atmosphere

Question 6

An experiment tests whether fertilizer affects plant height. The scientist grows 10 plants with fertilizer and 10 without. The plants without fertilizer are the:

Accepted Answer

Control group

Answer

Experimental group

Answer

Independent variable

Answer

Dependent variable