Problem 22
Form Hypotheses Why do Mars's two moons look like asteroids?
Problem 23
Display Mercury, Venus, Mars, Jupiter, and Saturn can be observed with the unaided eye. Research when and where in the sky these planets can be observed during the next year. Make a display illustrating your findings. Take some time to observe some of these planets.
Problem 23
What is an astronomical unit? Why is it useful?
Problem 24
Short Story Select one of the planets or a moon in the solar system. Write a short story from the planet's or moon's perspective. Include scientifically correct facts and concepts in your story.
Problem 24
Compare and contrast the distances between the planets in the solar system. Which planets are relatively close together? Which planets are relatively far apart?
Problem 25
Saturn's Atmosphere Saturn's atmosphere consists of \(96.3 \%\) hydrogen and \(3.25 \%\) helium. What percentage of Saturn's atmosphere is made up of other gases?
Problem 26
Length of Day on Pluto A day on Pluto lasts 6.39 times longer than a day on Earth. If an Earth day lasts \(24 \mathrm{~h}\), how many hours is a day on Pluto?
Problem 26
Explain how Earth's gravity affects objects that are on or near Earth.
Problem 27
Describe the shape of planets' orbits. What is the name of this shape? Where is the Sun located?
