Grade 7 Catch Up

What is light?

• A form of mechanical energy

• A form of electromagnetic radiation

• A form of sound energy

• A form of heat energy

What is a prism?

• A cylindrical block of glass

• A circular block of glass

• A rectangular block of glass

• A triangular block of glass

What is spectrum?

• The absence of colors

• The combination of all colors

• The breaking of beam into a variety of colors

• The reflection of colors

What is dispersion?

• A process by which light is separated into its colors

• A process by which light is combined into its colors

• A process by which light is absorbed into its colors

• A process by which light is reflected into its colors

What are radiowaves used for?

• To diagnose and treat cancer

• To produce visible light

• To cook food in microwave ovens

• To transmit cellular telephone messages

What are microwaves used for?

• To cook food in microwave ovens

• To transmit cellular telephone messages

• To diagnose and treat cancer

• To produce visible light

What are infrared waves used for?

• To detect heat artifacts and for night vision goggles

• To cook food in microwave ovens

• To transmit cellular telephone messages

• To produce visible light

What do our eyes detect?

• X-rays

• Infrared waves

• Visible light

• Ultraviolet waves

What does the Sun emit that causes skin tans and burns?

• Infrared waves

• Ultraviolet waves

• Visible light

• X-rays

What is used to image teeth at a dentist's office?

• Infrared waves

• X-rays

• Visible light

• Ultraviolet waves