Heat and Light Uses

What is the main source of heat and light on Earth?

• Moon

• Mars

• Light bulb

• Sun

How does the Sun provide heat and light to the Earth?

• Through nuclear fusion reactions in its core, releasing energy in the form of electromagnetic radiation.

• By absorbing heat and light from other stars in the galaxy and transferring it to Earth.

• Through a network of mirrors reflecting sunlight towards Earth.

• By emitting gravitational waves that carry heat and light to Earth.

Name one way in which we use heat in our daily lives.

• Ironing clothes

• Watching TV

• Playing video games

• Cooking

What is the process of converting light into electricity called?

• Photovoltaic effect

• Electricity generation

• Photon conversion

• Light transformation

Why is it important to have proper insulation in homes during cold weather?

• Proper insulation attracts pests into the house

• Proper insulation causes mold growth in homes

• Proper insulation helps retain heat inside the house, reducing energy bills and creating a comfortable living environment.

• Proper insulation increases the risk of fire hazards

What is the device used to measure temperature called?

• thermometer

• hygrometer

• barometer

• anemometer

How do plants use light to make their own food?

• Through photosynthesis

• With the help of unicorns

• By dancing in the moonlight

• Through magnetism

What is the unit used to measure light intensity?

• lux

• candela

• watt

• decibel

Explain how solar panels work to generate electricity.

• Solar panels generate electricity by emitting light rays that are then converted into electrical energy.

• Solar panels generate electricity by using magnets to attract sunlight particles.

• Solar panels generate electricity by absorbing heat from the sun and converting it directly into electricity.

• Solar panels generate electricity by converting sunlight into direct current (DC) electricity, which is then converted into alternating current (AC) electricity using an inverter for use in homes and businesses.

Name one way in which we can conserve energy related to heat and light.

• Leaving lights on when not in use

• Using old incandescent light bulbs

• Keeping windows open during winter to let heat escape

• Using energy-efficient LED light bulbs and appliances