George's Secret Key to the Universe Chapters 16-18

What is the most abundant gas in our atmosphere today?

• Nitrogen

• Helium

• Carbon Dioxide

• Hydrogen

• Oxygen

Choose THREE words to describe the protesters actions on pg 143 (Chapter 16).

• cheering

• shouting

• bellowing

• marching

What have you learned about Dr. Reeper?

• He's just a boring old teacher.

• He isn't too bad, just grumpy sometimes.

• He's a menacing and sinister man.

• He's a sweet, gentle, and loving soul.

What is the aim of Dr. Reeper’s chemistry experiment?

• He's trying to see how a star is born.

• He is testing the gases in Earth's atmosphere.

• He wants to create life.

• He wants to destroy the Earth

Choose THREE steps that describe Miller and Urey’s experiment on pg 162.

• Miller and Urey used electricity to strike chemical compounds found in our atmosphere.

• Miller and Urey produced special organic compounds called amino acids.

• Miller and Urey found out how life on Earth was created.

• Miller and Urey believed that all life on Earth was created naturally.

• Miller and Urey believed that humans were made by a creator.

The most basic chemicals that life on Earth needs is called _________. (pg. 161)

What’s the trouble with most of the planets that have been found so far (related to life)? (Choose TWO pg. 165)

• We haven't been there yet to find out.

• They are too close to the sun and therefore too hot to be habitable.

• They are rampant with alien life that want to see on our destruction.

• They are made of gas and therefore no life can survive on them.

What do we call a planet that revolves around a star that is not the sun?

• red dwarf

• dwarf planet

• black hole

• exoplanet

Why is it harder for astronomers to detect a planet than to detect a star? (Choose TWO)

• Stars are huge and emit bright light.

• Planets are much farther away.

• Stars are just closer to us.

• Planets are much smaller and only reflects the light of its star.

The Corot satellite was launched in 2006 and is able to detect the amount of ________ shining from a star.