Sunlight passes through the clear glass of Mrs. Cole's living room window, and she can see the sharp outlines of the trees outside. What word describes a material that light travels through like this?

The frosted glass in a bathroom window lets a soft glow of daylight into the room, but a person standing outside is only a blurry shape. What word describes the frosted glass?

When the heavy wooden door of a classroom is shut, no light from the hallway reaches the floor inside. What word describes a material that stops light from traveling through it?

Marco holds four things in bright sunlight, one at a time: a clear glass pane, a sheet of wax paper, a thin white plastic bag, and a wooden board. Which one casts the darkest shadow?

A thick cotton towel is held up in front of a bright lamp. No light comes through the towel, and nothing behind it can be seen at all. The towel is translucent.

A window made of clear glass blocks all of the daylight from entering a room.

Some of the light that hits a mirror bounces off its surface instead of passing through it.

Devon points a flashlight upward at a bathroom mirror, and a bright spot of light appears on the ceiling above him. What happened to most of the light when it reached the mirror?

On a sunny day, Maya's black shirt feels much warmer than her friend's white shirt. What is the black cloth doing with most of the sunlight that lands on it?

An engineer is designing a lamp shade so the bulb lights the room with a soft glow and no harsh glare. Which material best meets that goal?

A team is choosing a roof material for a greenhouse so the plants inside get as much sunlight as possible. Which material best meets that criterion?

Nora works a night shift and needs her bedroom to stay dark while she sleeps during the day. Which curtain material best meets her need?

Jonah wants to compare how much light different materials let through. He shines a flashlight at each material and looks at the wall behind it. What makes this a fair test?

In a dark room, Ben shines a flashlight through three samples. Sample A gives a sharp, clear view of the bulb. Sample B glows softly with no clear view. Sample C shows no light at all. Which sample is opaque?

One classroom has white walls and another has dark brown walls. With the same ceiling lights turned on, the white room looks brighter. What best explains the difference?

Ana shines a flashlight at three full glasses. The beam passes clearly through the water, glows dimly through the apple juice, and does not get through the milk at all. Which glass holds an opaque liquid?

Lena shines a flashlight at a wall. She holds a piece of cardboard in the beam, then a sheet of wax paper. Which one makes the lighter shadow on the wall, and why?

A student claims that the plastic lid on her lunchbox is translucent. Which observation best supports her claim?

Priya holds a sheet of thin tracing paper in front of a lamp. She can tell where the bulb is by a soft glow, but she cannot see the shape of the bulb at all. What word describes the tracing paper?

A shop wants a door that lets daylight into the shop and lets customers see the display inside from the sidewalk. Which material best meets both parts of that goal?