Mercury: the First Planet

Questions

1. Details How long is one year on Mercury?

   88 Earth days about 29 Earth years 687 Earth days 365 days
2. Details What is Mercury known for?

   a surface covered in craters thick clouds that trap heat a tilt that makes it spin on its side the fastest winds in the solar system
3. Cause and effect Why does Mercury have a surface covered in craters?

   Its soil contains iron that has rusted, which makes the planet look red. The rings are made of billions of pieces of ice and rock circling the planet. Winds on Jupiter are so strong that one storm has lasted for hundreds of years. It has almost no atmosphere to slow down space rocks, so they crash straight into the ground.
4. Vocabulary What does "crater" mean in the passage?

   a large planet made mostly of icy materials like water, ammonia and methane a bowl-shaped hole made when a space rock hits a surface a lean to one side the path a planet takes around the Sun
5. Details Where is Mercury in order from the Sun?

   the third planet the fourth planet the first planet the second planet
6. Main idea What is this passage mostly about?

   what the planet Earth is like what the planet Mercury is like what the planet Mars is like how rockets are built

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