Worksheet: Energy | IGCSE Cambridge Science for Year 6 - Class 6 PDF Download

Multiple Choice Questions (MCQ)

Q1. What is the primary source of energy for living organisms?

A) Sunlight

B) Food

C) Electricity

D) Water

Answer: B) Food

Explanation: For humans and animals, food serves as the primary source of energy necessary for survival and activity.

Q2. What type of energy is stored when an object like a spring is stretched or compressed?

A) Kinetic energy

B) Thermal energy

C) Elastic energy

D) Gravitational potential energy

Answer: C) Elastic energy

Explanation: Elastic energy is potential energy stored when objects such as springs or rubber bands are deformed (stretched or compressed).

Q3. Which type of energy transformation occurs at a hydroelectric power plant?

A) Chemical to electrical

B) Elastic to kinetic

C) Gravitational potential to electrical

D) Thermal to mechanical

Answer: C) Gravitational potential to electrical

Explanation: In hydroelectric power plants, the potential energy of water held back by a dam is converted into electrical energy.

Q4. What is an example of energy dissipation?

A) Storing energy in a battery

B) Using a microwave to heat food

C) Friction causing objects to heat up

D) Charging a smartphone

Answer: C) Friction causing objects to heat up

Explanation: Energy dissipation often occurs due to friction, where kinetic energy is converted into less useful forms such as heat.

Q5. Which device transforms electrical energy into both light and heat?

A) Solar panel

B) Electric lamp

C) Battery

D) Electric motor

Answer: B) Electric lamp

Explanation: An electric lamp converts electrical energy into light (useful energy) and also produces heat (often considered wasted energy).

True/False Questions

Q1. Kinetic energy is the energy stored in stationary objects.

Answer: False

Explanation: Kinetic energy is actually the energy possessed by moving objects, not stationary ones.

Q2. Thermal energy in an object is directly related to its temperature.

Answer: True

Explanation: The thermal energy of an object depends on its temperature, with hotter objects vibrating more intensely and storing more thermal energy.

Q3. Energy transfer by heating does not involve the movement of the object being heated.

Answer: True

Explanation: Energy transferred by heating raises the temperature of the object without necessitating its movement.

Q4. Batteries store energy through physical motion within them.

Answer: False

Explanation: Batteries store energy due to chemical reactions, not through physical motion.

Q5. Effective insulation can decrease a building’s energy efficiency.

Answer: False

Explanation: Effective insulation actually enhances a building's energy efficiency by reducing energy waste, keeping desired heat inside.

Fill in the Blanks

Q1. _______ energy is the energy possessed by objects due to their elevation above the ground.

Answer: Gravitational potential

Q2. Energy that is not used for its intended purpose and is lost as heat or other forms is called _______ energy.

Answer: Wasted

Q3. The process where energy spreads out and becomes less available for useful work is known as _______.

Answer: Energy dissipation

Q4. A device that converts gravitational potential energy to electrical energy is called a _______ power plant.

Answer: Hydroelectric

Q5. When energy is used to perform a desired task, it is referred to as _______ energy.

Answer: Useful

Match the Column

Column A:                               Column B:

A) Food                                    Chemical energy storage

B) Battery                                Elastic energy

C) Rubber band                  Thermal energy transfer

D) Oven                                  Biological energy source

Answers:

A-4, B-1, C-2, D-3

Explanation:

A) Food is a biological energy source for living organisms.

B) A battery stores energy through chemical reactions.

C) A rubber band stores elastic energy when stretched.

D) An oven transfers energy by heating, utilizing thermal energy to cook food.