Free GED Science Physical Science Practice Test

Question 1

What is the SI unit of force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Joule

Answer

Watt

Question 2

Which of Newton's Laws states that an object in motion stays in motion unless acted upon by an external force?

Accepted Answer

Newton's First Law (Inertia)

Answer

Newton's Second Law (F = ma)

Answer

Newton's Third Law (Action-Reaction)

Answer

Newton's Law of Gravitation

Question 3

What happens to the temperature of water when it boils at 100°C and becomes steam?

Accepted Answer

The temperature stays constant during the phase change

Answer

The temperature increases rapidly

Answer

The temperature decreases

Answer

The temperature fluctuates randomly

Question 4

What is the formula for calculating work?

Accepted Answer

W = F × d

Answer

W = m × v

Answer

W = P × t

Answer

W = m × a

Question 5

Which of the following is a chemical change (not a physical change)?

Accepted Answer

Wood burning

Answer

Ice melting into water

Answer

Paper being cut into pieces

Answer

Salt dissolving in water

Question 6

What is the atomic number of an element?

Accepted Answer

The number of protons in the nucleus

Answer

The number of neutrons in the nucleus

Answer

The total number of protons and neutrons

Answer

The mass of the atom

Question 7

Which type of wave requires a medium to travel?

Accepted Answer

Sound waves

Answer

Radio waves

Answer

Light waves

Answer

X-rays

Question 8

Ohm's Law states that voltage (V) equals:

Accepted Answer

Current × Resistance (V = IR)

Answer

Power × Time (V = Pt)

Answer

Current / Resistance (V = I/R)

Answer

Resistance / Current (V = R/I)

Question 9

What is the law of conservation of energy?

Accepted Answer

Energy cannot be created or destroyed, only converted from one form to another

Answer

Energy can be created from nothing under certain conditions

Answer

Energy decreases over time due to friction

Answer

Energy only exists in kinetic and potential forms

Question 10

An atom has 17 protons, 18 neutrons, and 17 electrons. What is its atomic mass?

Accepted Answer

35

Answer

17

Answer

18

Answer

34