P.3.2

What causes the blue color of the sky?

• emission of light by land and water surfaces
• reflection of light from land and water surfaces
• absorption of light by matter in the atmosphere
• scattering of light by matter in the atmosphere

What process forms an image in a mirror?

• absorbing light
• reflecting light
• refracting light
• transmitting light

Why does a leaf look green in the summer?

• The leaf absorbs green light.
• The leaf produces green light in its cells
• The leaf uses green light to make food in its cells
• The leaf reflects green light and absorbs other colors of sunlight.

Why can you see someone clearly through a clear glass window but not through a frosted glass window?

• Clear glass reflects light, but frosted glass absorbs light.
• Clear glass transmits light, but frosted glass scatters light.
• Clear glass transmits some light, but frosted glass absorbs all light.
• Clear glass scatters some light, but frosted glass transmits all light.

What is the effect of absorption of infrared light by human skin?

• sunburn on the skin surface
• disinfection of the skin tissues
• feeling of warmth on the skin
• immediate death of skin cells

How does the color of an object affect the amount of energy it receives from sunlight?

• Light colored objects reflect more light and become warmer than darker objects.
• Light colored objects absorb more light and become warmer than darker objects
• Dark colored objects reflect more light and become warmer than lighter objects.
• Dark colored objects absorb more light and become warmer than lighter objects.

What process in the atmosphere protects people from the ultraviolet rays in sunlight?

• Ozone absorbs ultraviolet light
• Nitrogen reflects ultraviolet light.
• Water vapor scatters ultraviolet light
• Carbon dioxide blocks ultraviolet light.

Students want to raise the temperature of water in a glass jar. The jar is on a table in full sunlight. The fastest way to increase the temperature without using a hot plate is to place

• a straw in the water.
• clear plastic wrap around the glass.
• a thermometer in the water
• black material around the glass

A class made a solar cooker out of a large can. What color should they paint the can in order to collect the MOST heat?

• black
• green
• pink
• white

What type of energy is transmitted from the Sun to Earth through space?

• heat energy
• kinetic energy
• electromagnetic energy
• electrical energy