Science Quiz for Grade 9 Students

What is the basic structural and functional unit of all living organisms?

• tissue

• organ

• cell

• molecule

Which organelle is known as the powerhouse of the cell?

• Ribosome

• Mitochondria

• Nucleus

• Endoplasmic reticulum

What is the function of the nucleus in a cell?

• Stores waste materials

• Produces energy for the cell

• Control center and contains genetic material

• Regulates the movement of substances in and out of the cell

According to Newton's first law of motion, an object at rest tends to stay at rest unless acted upon by what?

• a magnetic field

• an external force

• an internal energy

• a gravitational force

What is the formula for Newton's second law of motion?

• F = ma

• F = ma^2

• F = pa

• F = mv

What is the third law of motion proposed by Newton?

• Every action has an unequal reaction.

• For every action, there is an equal and opposite reaction.

• Actions have no reaction.

• Opposite reactions have no relation to actions.

Which scientist is credited with the discovery of the cell?

• Marie Curie

• Isaac Newton

• Galileo Galilei

• Robert Hooke

What is the function of the cell membrane?

• Controls the movement of substances in and out of the cell.

• Provides energy to the cell

• Stores genetic information

• Regulates cell division

In Newton's second law of motion, what does 'F' represent?

• mass

• velocity

• force

• acceleration

What is the name of the law that states 'for every action, there is an equal and opposite reaction'?

• Archimedes' Principle

• Newton's Third Law of Motion

• Boyle's Law

• Einstein's Theory of Relativity