GED Science 2

Question 1

According to Newton's Second Law of Motion, what happens to the acceleration of an object if the force applied to it is doubled while the mass stays the same?

Accepted Answer

Acceleration doubles

Answer

Acceleration is halved

Answer

Acceleration stays the same

Answer

Acceleration quadruples

Question 2

What is the difference between a physical change and a chemical change?

Accepted Answer

A chemical change produces a new substance; a physical change does not alter chemical composition

Answer

A physical change alters the substance's chemical composition; a chemical change does not

Answer

Physical changes are irreversible; chemical changes can be reversed

Answer

Chemical changes only involve temperature; physical changes involve shape

Question 3

Which statement correctly describes the conservation of mass?

Accepted Answer

The total mass of reactants equals the total mass of products in a chemical reaction

Answer

Mass is created during chemical reactions when new substances form

Answer

Mass is destroyed when substances are burned or decomposed

Answer

Mass changes depending on the temperature and pressure of the reaction

Question 4

What type of wave is a sound wave?

Accepted Answer

Longitudinal wave

Answer

Transverse wave

Answer

Electromagnetic wave

Answer

Surface wave

Question 5

An atom has 8 protons, 8 neutrons, and 8 electrons. What element is this, and what is its atomic mass?

Accepted Answer

Oxygen with atomic mass 16

Answer

Nitrogen with atomic mass 7

Answer

Neon with atomic mass 20

Answer

Carbon with atomic mass 12

Question 6

A student pushes a 10 kg box across a floor with a force of 50 N. The box does not move. What can you conclude?

Accepted Answer

The friction force equals or exceeds 50 N

Answer

The box has no friction force acting on it

Answer

There is a net force of 50 N on the box

Answer

The box's weight equals 50 N