Science Quiz

What does Newton's Law of Gravitation state?

• Only large masses attract smaller masses with a constant force.

• Every mass repels every other mass with a force proportional to their distances.

• Gravitation only affects objects in motion, not stationary ones.

• Every mass attracts every other mass with a force proportional to their masses and inversely proportional to the square of the distance between them.

Which force pulls objects towards each other?

• Gravity

• Magnetism

• Electromagnetism

• Friction

What is the unit of gravitational force?

• Joule (J)

• Kilogram (kg)

• Newton (N)

• Pound (lb)

What are the two types of magnetic poles?

• Positive Pole and Negative Pole

• East Pole and West Pole

• Magnetic North and Magnetic South

• North Pole and South Pole

What happens when two like magnetic poles are brought together?

• Like magnetic poles generate electricity.

• Like magnetic poles attract each other.

• Like magnetic poles repel each other.

• Like magnetic poles create a neutral force.

What is the area around a magnet where magnetic forces can be felt called?

• magnetic field

• magnetic core

• magnetic zone

• magnetic region

What is frictional force?

• Frictional force is the force that acts only when surfaces are not in contact.

• Frictional force is the force that enhances the relative motion of two surfaces in contact.

• Frictional force is the force that opposes the relative motion of two surfaces in contact.

• Frictional force is the force that pulls two surfaces together without any motion.

What are the two main types of friction?

• Air resistance and gravitational friction

• Fluid friction and surface friction

• Static friction and kinetic friction

• Sliding friction and rolling friction

How does friction affect motion?

• Friction increases the speed of moving objects.

• Friction opposes motion and can slow down or stop moving objects.

• Friction has no effect on motion.

• Friction only occurs in liquids and gases.

Which force is responsible for keeping planets in orbit?

• Centrifugal force

• Gravitational force

• Electromagnetic force

• Nuclear force