GRADE 10 SCIENCE LONG QUIZ

What do you call waves formed by the interaction of an electric field and a magnetic field?

• Mechanical waves

• Electromagnetic waves

• Longitudinal waves

• Sound waves

What is the main difference between EM waves and mechanical waves?

• EM waves need a medium

• Mechanical waves are faster

• EM waves can travel in a vacuum

• Mechanical waves are made of radiation

What do we call the transfer of energy through EM waves?

• Refraction

• Radiation

• Diffraction

• Transmission

How fast do EM waves travel in a vacuum?

• 3 × 10⁶ m/s

• 3 × 10⁸ m/s

• 3 × 10¹⁰ m/s

• 3 × 10¹² m/s

How many minutes does it take for sunlight to reach the Earth?

• 1 minute

• 5 minutes

• 8 minutes

• 15 minutes

Which of the following is an example of reflection of EM waves?

• Boiling water in a microwave

• Remote control working on a mirror reflection

• Warming the body through infrared

• Taking an X-ray of bones

Which EM wave has the longest wavelength?

• Infrared

• Radio waves

• Gamma rays

• Ultraviolet

What is a disadvantage of using radio waves in communication?

• Cannot pass through walls

• Easily interfered by other devices

• Too expensive to use

• Has no energy

Which is the main use of microwaves?

• Making windows

• Cooking and satellite communication

• Photography

• Removing radiation

How does a microwave oven cook food?

• Uses light to heat food

• Heats the water molecules in food

• Direct flame heats food

• Chemical reaction occurs