Science Quiz for Grade 12 Students

What is the chemical symbol for gold?

• Ag

• Au

• Pt

• Fe

What is the process by which plants make their own food called?

• Photosynthesis

• Transpiration

• Respiration

• Fermentation

What is the smallest unit of matter?

• Cell

• Atom

• Molecule

• Organism

What is the force that pulls objects towards the center of the Earth?

• gravity

• magnetism

• centrifugal force

• electromagnetism

What is the chemical formula for water?

• H2O

• 2OH

• O2H

• HO2

What is the largest organ in the human body?

• Lungs

• Liver

• Skin

• Heart

What is the process by which plants release water vapor through their leaves called?

• Evaporation

• Transpiration

• Condensation

• Respiration

What is the process by which a liquid turns into a gas called?

• Evaporation

• Condensation

• Solidification

• Sublimation

Speed of light in vacuum is

• 3.o×10^4

• 3.0×10^8

• 3.0×10^3

• 3.0×10^9

What is the physical state of water at 373 Kelvin

• Ice

• Liquid

• Solid

• Water Vapour