Why is the surface of Venus so hot?
20) What features on Venus’ surface make it hostile to human life? 21) How does the surface of Venus look like, as seen from close by? 23) Why does the surface of Venus appear reddish? 24) Is there, or has there been, water on Venus? 25) How many moons does Venus have? • Mars: • 1) Where did the planet Mars get its name from? 2) How far is Mars from the Sun? How large is Mars, in terms of Earth sizes? Does Mars have seasons like Earth? What are they due to? How long is a day on Mars? Are there active spacecraft from Earth currently on or around Mars? Why is the surface of Mars red? How can we estimate the age of a planet’s surface using spacecraft photos? Does Mars have (active) volcanoes? Which of the terrestrial planets has the highest known volcanoes? How can a smaller planet like Mars have taller volcanoes than the Earth? What is the difference between the North and South hemispheres on Mars? How can we compare the ages of different parts of a planet’s surface? Is there, or has the
