Describe the atmospheres of Venus, Earth, Mars, and Titan.

What are the three most important elements in fertilizer, by mass?

Why can't an airplane fly into space?

Draw a diagram showing how a lens works.

List the features that are common to all tetrapods.

How old is the Earth?

How old is the Universe?

How old is the How long ago did the Earth develop an oxygen atmosphere?

How long ago did tetrapods emerge?

List the natural disasters that are capable of causing a mass extinction?

Draw a diagram showing why the state of Washington has lots of volcanoes.

Draw a diagram showing spectrum of
*) Photosynthesis
*) Red cone cells
*) Green cone cells
*) Blue cone cells
*) Rod cells
*) A blackbody with a temperature of 6000 Kelvin (like the sun)
*) A blackbody with a temperature of 3000 Kelvin (like the Trappist1 star)
*) A blackbody with a temperature of 300 Kelvin (like the Earth. 300 Kelvin = 27 Celsiss)