Jss3 first term basic science past questions and answers

Jss3 first term basic science past questions and answers

Here are 20 basic science questions for Junior Secondary School 3 (JSS3) students, along with multiple-choice options and answers:

What is the chemical symbol for oxygen?

A) O

B) Ox

C) O2

D) Oxide

Answer: A) O

Which planet is known as the "Red Planet"?

A) Venus

B) Earth

C) Mars

D) Jupiter

Answer: C) Mars

What is the primary function of the heart?

A) Pump blood

B) Digest food

C) Filter air

D) Store energy

Answer: A) Pump blood

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

A) Respiration

B) Photosynthesis

C) Digestion

D) Fermentation

Answer: B) Photosynthesis

Which of the following is a greenhouse gas?

A) Oxygen

B) Nitrogen

C) Carbon dioxide

D) Hydrogen

Answer: C) Carbon dioxide

What is the SI unit for measuring temperature?

A) Kelvin

B) Celsius

C) Fahrenheit

D) Rankine

Answer: A) Kelvin

Which part of the human eye is responsible for controlling the amount of light entering?

A) Cornea

B) Pupil

C) Retina

D) Lens

Answer: B) Pupil

What is the chemical symbol for gold?

A) Go

B) Au

C) Ag

D) Ge

Answer: B) Au

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

A) Magnetism

B) Friction

C) Gravity

D) Tension

Answer: C) Gravity

Which of the following is a non-metal element?

A) Iron

B) Carbon

C) Copper

D) Silver

Answer: B) Carbon

What is the chemical formula for water?

A) CO2

B) H2O

C) O2

D) H2

Answer: B) H2O

What gas do plants absorb from the atmosphere during photosynthesis?

A) Carbon dioxide

B) Oxygen

C) Nitrogen

D) Hydrogen

Answer: A) Carbon dioxide

Which layer of the Earth's atmosphere is closest to the surface?

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Exosphere

Answer: A) Troposphere

What is the process by which water changes from a liquid to a gas at the surface of the Earth?

A) Evaporation

B) Condensation

C) Precipitation

D) Sublimation

Answer: A) Evaporation

What is the chemical symbol for sodium?

A) So

B) Na

C) Ns

D) Sa

Answer: B) Na

Which planet is known as the "Morning Star" and "Evening Star" because it's visible in the sky shortly before sunrise and after sunset?

A) Mercury

B) Venus

C) Mars

D) Jupiter

Answer: B) Venus

What is the unit of electric current?

A) Watt

B) Volt

C) Ampere

D) Ohm

Answer: C) Ampere

What is the study of the Earth's surface and the processes that shape it called?

A) Astronomy

B) Geology

C) Meteorology

D) Biology

Answer: B) Geology

What is the process of a liquid turning into a solid called?

A) Condensation

B) Melting

C) Freezing

D) Evaporation

Answer: C) Freezing

Which gas do humans primarily exhale when they breathe out?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: B) Carbon dioxide