Unit 5 Lesson 7 What is Sound?

What is the primary role of an optometrist?

• A doctor who performs surgeries.

• A doctor who examines people's eyes to check their vision.

• A doctor who treats bone fractures.

• A doctor who specializes in dental care.

What is an X-ray?

• A type of sound wave used for communication.

• A powerful, invisible ray of energy that can pass through an object.

• A device used to measure temperature.

• A tool for magnifying small objects.

Which of the following items did Samuel NOT serve for breakfast?

• Pancakes

• Eggs

• Waffles

• Bacon

What is white light composed of?

• Only blue and yellow colors.

• A spectrum of all the colors we see in visible light.

• Invisible light energy only.

• Only black and white shades.

Why does grass appear green?

• It absorbs green light waves.

• It reflects green light waves.

• It absorbs all light waves.

• It reflects all light waves.

What happens when light hits a black material?

• It reflects all colors of light.

• It absorbs all colors of light.

• It reflects only black light.

• It absorbs only black light.

Why is it recommended to wear white clothes in the summer?

• White materials absorb most light, keeping you warm.

• White materials reflect most light, keeping you cool.

• White materials absorb all colors, making them fashionable.

• White materials reflect only white light, which is cooler.

Which type of ice cream would melt faster under the same conditions?

• Vanilla, because it's lighter in color.

• Chocolate, because it's darker in color.

• Both would melt at the same rate.

• Neither would melt if kept in the shade.