Mars: the Fourth Planet

Questions

1. Details How long is one year on Mars?

   225 Earth days about 12 Earth years about 84 Earth years 687 Earth days
2. Details What is Mars known for?

   red, rusty dust a surface covered in craters wide, bright rings liquid water on its surface
3. Cause and effect Why does Mars have red, rusty dust?

   Its soil contains iron that has rusted, which makes the planet look red. Its winds can blow at about 2,000 kilometers an hour, faster than the speed of sound on Earth. It is the right distance from the Sun for water to stay liquid, not frozen or boiled away. Winds on Jupiter are so strong that one storm has lasted for hundreds of years.
4. Vocabulary What does "volcano" mean in the passage?

   a bowl-shaped hole made when a space rock hits a surface a large planet made mostly of icy materials like water, ammonia and methane flat bands of ice and rock that circle a planet an opening in a planet's surface where melted rock comes out
5. Details Where is Mars in order from the Sun?

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

   how rockets are built what the planet Mercury is like what the planet Mars is like what the planet Earth is like
7. Inference Based on the passage, why is a year on Mars longer than a year on Earth?

   It spins faster. It is hotter than Earth. It is farther from the Sun, so its orbit is longer. It has more clouds.
8. Evidence Which sentence best explains why Mars has red, rusty dust?

   The temperature on Mars is about minus 60 degrees Celsius on average. Its soil contains iron that has rusted, which makes the planet look red. Mars has Olympus Mons, the tallest volcano in the solar system. One year on Mars, the time it takes to travel once around the Sun, lasts 687 Earth days.

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