GED Science Test #8 2

Question 1

What is the charge of a neutron?

Accepted Answer

Neutral (no charge)

Answer

Positive

Answer

Negative

Answer

Variable depending on the element

Question 2

According to the theory of plate tectonics, mid-ocean ridges form where tectonic plates are:

Accepted Answer

Diverging (moving apart)

Answer

Converging (moving together)

Answer

Sliding past each other

Answer

Subducting under each other

Question 3

Which macromolecule serves as the primary long-term energy storage molecule in animals?

Accepted Answer

Fat (lipid)

Answer

Carbohydrate

Answer

Protein

Answer

Nucleic acid

Question 4

A solution contains 20g of NaCl dissolved in 100g of water. The solute is:

Accepted Answer

NaCl (sodium chloride)

Answer

Water

Answer

The entire mixture

Answer

Neither substance

Question 5

Which of the following illustrates the Law of Conservation of Energy?

Accepted Answer

A swinging pendulum converts potential energy to kinetic energy and back, with total energy remaining constant

Answer

A fire produces more energy than the wood contains

Answer

Electricity can be created from nothing using magnets

Answer

Energy is lost whenever work is performed

Question 6

Scientists use carbon-14 dating to determine the age of organic materials. This technique relies on:

Accepted Answer

The predictable decay rate of radioactive carbon-14 isotopes

Answer

The color change of carbon in old materials

Answer

The hardness of fossilized carbon

Answer

The amount of oxygen absorbed by dead organisms