GED Science Test #8 2

Question 1

What is the charge of a neutron?

Accepted Answer

Neutral (no charge)

Answer

Neutrons have no electrical charge (neutral). Protons carry a positive charge and electrons carry a negative charge. Neutrons reside in the nucleus alongside protons.

Question 2

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

Accepted Answer

Diverging (moving apart)

Answer

Mid-ocean ridges form at divergent boundaries where plates move apart. Magma rises to fill the gap, creating new oceanic crust. The Mid-Atlantic Ridge is a classic example.

Question 3

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

Accepted Answer

Fat (lipid)

Answer

Fats (lipids) serve as the primary long-term energy storage in animals, storing more than twice the energy per gram compared to carbohydrates. Carbohydrates are used for short-term, readily available energy.

Question 4

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

Accepted Answer

NaCl (sodium chloride)

Answer

In a solution, the solute is the substance dissolved (NaCl) and the solvent is the substance doing the dissolving (water). The resulting mixture is the solution.

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

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed. A pendulum converts between potential and kinetic energy, but the total energy remains the same (ignoring friction).

GED Practice Test

GED Practice Test

GED Science Test #8 2