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# Do DIFFERENT COLORS ABSORB HEAT BETTER? - PowerPoint PPT Presentation

Do DIFFERENT COLORS ABSORB HEAT BETTER?. BY: Mylie Hill. Activity. p lace students in groups s tudents make 4 different color boxes for testing (white, yellow, red, black) give each group 4 ice cubes (one per box) l eave ice cubes placed in colored boxes in the sun or under heat lamp

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### Do DIFFERENT COLORS ABSORB HEAT BETTER?

BY: Mylie Hill

• place students in groups

• students make 4 different color boxes for testing (white, yellow, red, black)

• give each group 4 ice cubes (one per box)

• leave ice cubes placed in colored boxes in the sun or under heat lamp

• predict which color box melts ice first

• record the order and time required to melt ice

• Group Members:____________________________________

• Do different colors absorb heat better than others?

• Colors Time to Melt (Min)

• White___________________________________

• Red_____________________________________

• Yellow___________________________________

• Black____________________________________

• Which ice cube melted first, second, third, and fourth?

• Do different colors absorb heat better than others?

Before

After

• certain colors absorb light better than others

• the sun produces heat and light

• Why do ice cubes melt?

• the purpose of solar panels

• changes that occur in objects

On a summer afternoon, the black roof at left was measured to be 54ºF (30ºC) warmer than the white roof at right

• heat: A form of energy that causes substances to rise in temperature or to go through associated phase changes (as melting, evaporation, or expansion).

• solar energy: Energy derived from sunlight.

• solar cell: A photo-electric cell that converts sunlight directly into electrical energy and can be used as a power source.

• solar panel: A group of solar cells forming a flat surface (as on a spacecraft).

• energy: The capacity for doing work; raising weight, for example.

• absorb: To take in; to transform (radiant energy) into a different form usually with a resulting rise in temperature.

• reflect: To bounce waves of light, sound, or heat off a surface.

• radiant energy: Energy (as heat waves, light waves, radio waves, x-rays) transmitted in the form of electromagnetic waves.

• Engineers use understanding of how different colors reflect light/heat

• design products & find solutions

• Asphalt roads/tar roofs absorb heat

• white roofs reflect heat cooling temperatures

• People use the knowledge when deciding what to wear

• white shirt on sunny day

• dark shirt on cooler day

Workers install a white roof in Atlanta, Georgia,

to reduce the amount of energy required to keep the inside building

• Earth and Space science

• During Physical science lesson

• Investigate properties of matter & changes occurring in objects

• Investigate melting objects