Welcome Students!. How do you feel in the sunlight? Warm!

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Presentation transcript:

Welcome Students!

How do you feel in the sunlight? Warm!

Why? The Sun gives off: Light Heat

This heat and light is called … Solar Radiation: heat and light from the Sun

Solar Radiation is reflected and absorbed

Reflection: heat and light bounce off a surface

Absorption: heat and light are taken in by a surface

Solar radiation warms the Earth

Earths atmosphere protects us from most solar radiation

There is no atmosphere in space, so it can get very hot or very cold

Astronauts need extra protection in space from the extreme temperatures

Why else do astronauts need extra protection? No air No pressure space debris

What do Astronauts wear for protection in space?

The Experiment: why are space suits white? You will get two envelopes One light envelope One dark envelope

Place a thermometer inside each envelope

Place the envelopes in the light, record the temperatures, and predict how they will change

Graph your results! 100 ° F 90 ° F 80 ° F 70 ° F 60° F 0 mins 5 mins 10 mins 15 mins 20 mins

Write a Hypothesis: Which color do you think will get warmer and why?

Which envelope was warmer? The dark envelope! Why?

Dark colors absorb light: take heat in get hotter faster

Thats why black asphalt is so hot in the summer

Which envelope stayed cooler? The light envelope! Why?

Light colors reflect light: Heat bounces off Stay cooler

This is why astronauts wear light colored space suits!

Did You Know? Space suits also have built-in air conditioning to help keep astronauts cool!