Let There Be Light!

Match the following terms to their correct description.

• Translucent

• Does not let light pass through

• Opaque

• Allows light through but scatters (diffuses) it so objects can't be seen clearly

• Transparent

• Allows light to pass straight through

Answer explanation

🔴A spot of darkness cast by an opaque object is a shadow. At noon, your shadow will be small. In the morning or evening, it will be longer.

🌕Night is only a really big shadow!

Tags

NGSS.MS-PS4-2

(a)   travels faster than anything else that scientists can measure—approximately 186,000 miles a second through space.

• Light

• Sound

Answer explanation

Light can go to the moon and back in three seconds!

Light cannot travel around corners because it always travels in a (a)   .

• straight line
• wavy line

An object that produces its own light is a ______ object.

• luminous
• reflective
• transparent
• opaque

Answer explanation

Some objects seem to be luminous but actually only reflect light from a luminous source. Stars ARE luminous, but the moon and plants are NOT. We seem them because they reflect the light of the sun.

(a)   are the luminous objects we see in God's creation.

• Natural lights

• Artificial lights

• Bouncing lights

Answer explanation

🐛Animals such as the firefly and glowworm give off natural light without producing heat.

🐠The lantern fish has light organ like a lantern turning on and off, and the deep-sea angler has its light on the end of a long "fishing pole."

🍄Plants such as the orange jack-o'-lantern mushroom are luminous.

🌩Lightning is one of the most spectacular natural lights!

Tags

NGSS.4-PS4-2

Who invented the electric light bulb?

• Alexander Graham Bell
• Benjamin Franklin
• Thomas Edison

Answer explanation

Using only a charred, coiled cotton thread, Edison made a bulb that burned for over 40 hours.

Most of the bulbs in houses today are similar to Edison's. An incandescent bulb contains within a tightly sealed glass bulb a thin wire made of tungsten that heats up and glows when electricity is sent through.

A (a)   mirror bulges away from the viewer, making things look smaller, and a (b)   mirror bulges toward the viewer, making things look larger.

• concave

• convex

(a)   mirrors are used in spotlights, telescopes, and headlights of cars because the curved surface of these mirrors focuses light beams so that they shine more brightly.

• Concave

• Convex

Tags

NGSS.MS-PS4-2

What is the definition of light?

• Energy moving through space from its source to an object, then from that object to our eyes

• A type of sound wave that travels through space

• A form of matter that travels through space

Answer explanation

Any material heated to a high temperature will give off light.

Tags

NGSS.MS-PS4-1

How can you make light turn corners?

• By increasing the heat source

• By increasing the brightness of the light source

• By using mirrors that reflect light from one another

Answer explanation

Mirrors inside of a kaleidoscope reflect light to produce the interesting patterns you see when you shake it.

Tags

NGSS.MS-PS4-2