What is the main topic of the lesson introduced by Teacher PR?

• The nature of light, heat, and sound

• The behavior of waves

• The force exerted by magnets

• The properties of different materials

How does light travel through a single medium?

• In a curved line

• In a straight line

• In a zigzag pattern

• In a circular motion

What is the speed comparison between light and sound?

• They travel at the same speed

• Light and sound do not travel

• Light travels faster than sound

• Sound travels faster than light

Which of the following statements is true about sound waves?

• Sound waves travel at different speeds through different media

• Sound waves are faster than light waves

• Sound waves do not require a medium to travel

• Sound waves travel at the same speed through all media

What is the method of heat transfer through solid materials called?

• Radiation

• Conduction

• Evaporation

• Convection

Which method of heat transfer does not require a medium?

• Evaporation

• Radiation

• Convection

• Conduction

What happens when you block the path of light with a thick cardboard?

• The light passes through the cardboard

• The light is absorbed by the cardboard

• The light is reflected by the cardboard

• The light is blocked by the cardboard

What is the result when cardboards with aligned holes are used in the experiment?

• The light is absorbed

• The light is blocked

• The light passes through the holes

• The light is scattered

What is the effect of misaligning one of the cardboards in the experiment?

• The light is absorbed

• The light passes through all cardboards

• The light is blocked

• The light is reflected

What is the direction of heat transfer?

• From cold to hot

• From hot to cold

• From side to side

• From bottom to top