<p style="text-align: left;">The title of this unit is Earth and Mars. Do you see that small red dot shining in the night sky? That's Mars. It is the closet planet to us. As you May know, Earth and Mars are planets.<br>Another thing these planets share is that both have moons. Earth has one moons, while Mars <br>has two, Phobos and Deimos. Just like their moons orbit them, Earth and Mars orbit the Sun. Compared to Mars, Earth is closer to the Sun and has a faster orbit speed. The size, mass, and gravity of the planets are quite different, too. Mars gravity is also much weaker. Mars has only one - third the gravity of Earth. These only a few features of Earth and Mars. Do you know of any other ones?<br>I think this book is very difficult. </p>
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Do you see that small red dot shining in the night sky? That's Mars. It is the closest planet to us. As you may know, Earth and Mars are planets. Another thing these planets share is that both have moons. Earth has one moon, while Mars has two: Phobos and Deimos. Just like their moons orbit them, Earth and Mars orbit the Sun. Compared to Mars, Earth is closer to the Sun and has a faster orbit speed. The size, mass, and gravity of the planets are quite different, too. Mars's gravity is also much weaker.
첫댓글 The title of this unit is "Earth and Mars."
Do you see that small red dot shining in the night sky? That's Mars. It is the closest planet to us. As you may know, Earth and Mars are planets. Another thing these planets share is that both have moons. Earth has one moon, while Mars has two: Phobos and Deimos. Just like their moons orbit them, Earth and Mars orbit the Sun. Compared to Mars, Earth is closer to the Sun and has a faster orbit speed. The size, mass, and gravity of the planets are quite different, too. Mars's gravity is also much weaker.
Mars has only one-third the gravity of Earth. These are only a few features of Earth and Mars. Do you know of any others?
I think this book is very difficult.