Middle School Physical Science and Earth Science Assessment

What happens to the motion of an object when the sum of all forces acting on it equals zero?

• The object speeds up

• The object maintains its current motion

• The object changes direction

• The object always stops moving

Which statement best describes the relationship between mass and gravitational force?

• Only large masses create gravitational forces

• Gravitational force increases as mass increases

• Mass has no effect on gravitational force

• Gravitational force decreases as mass increases

How do waves transfer energy?

• By moving matter from one place to another

• Through the motion of particles in the medium

• By changing the temperature of the medium

• Only through solid materials

What is the primary cause of the phases of the Moon?

• Earth's shadow on the Moon

• The Moon's position relative to Earth and Sun

• Changes in the Moon's rotation

• Weather patterns on Earth

How do natural hazards affect human activities?

• They have no impact on human society

• They only affect coastal regions

• They influence where and how people live

• They only occur in tropical regions

What happens to the speed of an object when balanced forces act on it?

• The speed remains constant

• The speed always increases

• The speed always decreases

• The speed fluctuates randomly

How does distance affect gravitational force between two objects?

• It has no effect

• Force increases with distance

• Force decreases as distance increases

• Force only changes at very large distances

What determines the wavelength of a wave?

• Only the wave's speed

• The distance between corresponding points

• Only the wave's amplitude

• The temperature of the medium

Which factor most influences the strength of Earth's gravitational field?

• The time of day

• Earth's mass

• The weather

• The season

How do electromagnetic forces affect charged particles?

• They only affect positive charges

• They can attract or repel

• They only work in water

• They only affect metals