Why are planets closer to the sun made of different substances than planets farther from the sun?
- why do some planets appear to move backward in the sky?
- how do the planetary systems discovered?
- what are kepler’s laws of planetary motions?
- what are newton’s laws and how do they apply to a planetary system?
- what are some ways that the motions of the earth, moon, and sun influence each other?

Which technically is nasa developing that will astronauts reach mars

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.

Toorale man murder mystery < - your lab link 1. how was the toorale man found? 2. what did archaeologists learn about the burial? why is the burial important? 3. what information were the scientists able to learn from the skeleton itself? 4. why is the question of whether the injuries came from a stone or steel weapon important? how could scientists distinguish between the different types of weapons? 5. what did the carbon dating and soil testing tell scientists about toorale man? why are the dates interesting for scientists?