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The inner planets
have this in common
What is a small rocky
surface?
These are the names of the
gas giants.
What are Jupiter, Saturn,
Uranus and Neptune?
The largest and most
massive planet
What is Jupiter?
Neptune is very similar in
size and color to this
planet.
What is Uranus?
This inner planet once had
liquid water on its surface.
What is Mars?
The gas giants can’t let this
escape into space because
the planets have very
strong gravitational pulls.
What is their atmosphere?
This is the direction
Uranus rotates.
What is on its side?
This force tends to pull
together the matter in stars.
What is gravity?
This is likely to happen to
the universe in the future.
What is, it will expand
forever?
A loose grouping of a few
thousand stars.
What is an open cluster?
Saturn’s rings are
made up mostly of
these types of chunks.
What are chunks of ice and
rock?
This may indicate that
a planet may exist
near a distant star.
What is a wobble or slight
forward and backward
motion?
This supports the hypothesis
that Mars may once have had
the conditions needed to
support life.
What is evidence that
liquid water was once
present?
The four outer planets
have this in common.
What is they are larger
than Earth and are made
mainly of hydrogen and
helium?
This explains why many
large optical telescopes are
located on mountains.
What is so they can be
above the atmosphere?
A meteoroid that enters
Earth’s atmosphere
produces this streak of
light.
What is a meteor?
The mysterious force that
may be causing the
expansion of the
universe to accelerate.
What is Dark Energy?
Astronomers predicted the
existence and orbit of
Neptune based on this.
What is Neptune’s
gravitational effect on the
orbit of Uranus?
Meteroids usually come
from these.
What are comets or
asteroids?
One of the conditions
required for life on
Earth is this liquid.
What is water?
For this reason, Europa is
considered a good place to
look for life.
What is there may be
liquid water under its icy
crust?
This is the shape of the
orbits of most comets .
What are long narrow
ellipses?
The smallest
terrestrial planet.
What is Mercury?
These are two ways Venus
and Earth are much alike.
What is their size and
density?
The asteroid belt is
located here.
Where is between Mars
and Jupiter?