Download Chapter 8 Lesson 3 The Solar System

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Taking turns and without
talking, write down everything
you know about the solar
1. Each planet revolves around
the Sun in an orbit shaped like
an ellipse, a slightly flattened
2. Newton discovered that the
balance between gravity and
inertia keeps the planets in orbit.
3. In the 1500s, Copernicus
proposed that the planets revolve
around the Sun.
4. Telescopes make faraway
objects seem closer.
5. In the 1960s, rockets from
NASA took astronauts into space.
6. The United States worked with
other countries to build the
International Space Station,
which can stay in space for a
long time.
7. An unmanned spacecraft that
carries data-recording equipment
into space is called a probe.
8. Earth, Mars, Mercury, and
Venus are closest to the Sun and
are called the rocky planets.
9. The atmosphere of Venus is
made of carbon dioxide.
10. The four outer planets lie
beyond Mars.
11. All of the outer planets are
made mostly of hydrogen and
12. The largest planet is Jupiter,
and the next-largest is Saturn.
13. When comets get close to the
Sun, they form a tail.
14. Most asteroids lie in a belt
between Mars and Jupiter.
Smaller planets are called dwarf
planets. Most are round and
made of rock and ice. Their
orbits cross the orbits of other
On a separate sheet of paper,
please complete a 3-2-1 on today’s
lesson. Please write:
3- Three things you learned
2- Two more questions you
still have.
1- The most interesting thing
about the lesson.