Discussion questions

f. Which is hotter, Mercury or Venus? Why? h. Explain why there are two general families of planets, rocky terrestrial and gaseous jovian. j. What knowledge do comets and asteroids provide to studies of the origin of the solar system?

How the age of rocks can be determined by radioactivity internal structure of the Earth

a. Explain how the age of rocks can be determined by radioactivity. Give an example. b. How can scientists determine the internal structure of the Earth, if the depth of the deepest well is only a tiny fraction of the earth's diameter?

What knowledge do comets and asteroids provide to studies of the origin of the solar system?

What knowledge do comets and asteroids provide to studies of the origin of the solar system?

Discussion questions

1) Why are only radio and optic telescopes used on the earth's surface? 2) What is nuclear fusion and how does it work in the sun?

Light is one form of electromagnetic radiation...

a. Light is one form of electromagnetic radiation. What are electromagnetic waves and what other types are there besides light? Compare their wavelengths. b. How can the temperature, composition, and motion of an object be determined from its light spectrum? (Please explain in simple terms, if possible)