Exam Paper Design: 17 MCQs with answers

Copper

Copper is a metal and metals are good conductors of electricity, while rubber, wood, and plastic are insulators.

Coal

Coal is a fossil fuel that takes millions of years to form and is thus non-renewable, while solar, wind, and hydro are renewable sources.

Newton

The SI unit of force is the Newton (N), named after Sir Isaac Newton. Joule is for energy, Watt for power, and Pascal for pressure.

Mitochondria

Mitochondria produce ATP through cellular respiration, providing energy for the cell, hence called the powerhouse.

Energy

Energy is not matter; it is a property. The three common states of matter are solid, liquid, and gas.

Condensation

Condensation is the change of water vapour into liquid water when cooled.

Species

Species is the most specific and basic unit in biological classification.

Friction

Friction is the force that acts opposite to the direction of motion and slows objects down.

Growth

Growth is a fundamental characteristic of living organisms. The other options are physical processes.

Ampere

Electric current is measured in Amperes (A). Volt is for potential difference, Ohm for resistance, and Watt for power.

True

Metals like copper and aluminum are known for their high thermal and electrical conductivity.

False

Evaporation is a physical change because no new substance is formed; only the state of matter changes.

Evaporation

Evaporation is the process where a liquid turns into vapour at any temperature below its boiling point, unlike boiling which occurs at a specific temperature.

Rusting of iron

Rusting of iron forms a new substance (iron oxide) and is a chemical change, while the others are physical changes.

Time

Speed = Distance ÷ Time. This is the basic formula for speed.

Displacement

Displacement has both magnitude and direction, making it a vector. Speed, distance, and mass are scalars.

Filtration

Filtration is used to separate insoluble solids like sand from water.