Download Chapter 27 Study Notes

Study Notes: Chapter 27
Planets of the Solar System
1

The early oceans became ______ when
dissolved solids were carried from land
into the oceans.

salty
2

About ____ of all matter contained in the
solar nebula now exists in the sun.

99%
3

Small bodies that orbit planets are called
________.

moons.
4

When early Earth’s atmosphere
formed, and hydrogen gases were lost
because Earth’s _____ was too weak.
helium
 gravity

5

Copernicus proposed a ______ model of
the universe, in which the planets revolve
at different speeds around the sun.

heliocentric
6

Mars’s volcanoes are _______ than those
of Earth because Mars has no moving
tectonic plates.

larger
7

Impact ______ are caused by collisions
with _______ in space.
craters
 objects

8

Venus is a planet with a runaway
____________ effect.

greenhouse
9

The factors that contribute to Mercury’s
daily temperature fluctuation of about
600°C are the planet’s slow ______ and it
is the closest planet to the ____.
rotation
 sun.

10

A region of the solar system just ________
Neptune’s orbit, which contains small
bodies made mostly of ice, is called the
______ belt.
beyond
 Kuiper

11

Neptune’s Great ______ ______ is a giant
_________.
Dark Spot
 storm.

12

The least _______ planet in the solar
system is ______.
dense
 Saturn

13

The right combination of ______, ______,
and _______ supports life on Earth.
temperature
 water
 oxygen

14

Kepler’s first law states that planets orbit
the sun in paths called ________.

ellipses.
15

Young Earth formed a core, mantle, and
crust in a process called _________.

differentiation
16

_____ is a planet which has _____ regions
that may still be active.
Mars
 volcanic

17

The early ______ developed when many
volcanic eruptions released large amounts
of gases in a process called __________.
atmosphere
 outgassing.

18

_____ is the planet that has _____ like
Earth’s because its axis tilts at an almost
identical angle.
Mars
 seasons

19

A rotating cloud of gas and dust from
which Earth’s solar system formed is
called a solar _____.

nebula
20

When the solar system formed, smaller
bodies joined together through collision
and the force of ______ to form larger
bodies called _________.
gravity
 protoplanets.

21

Jupiter’s Great ____ Spot and _______
Great Dark Spot are both raging _______.
Red
 Neptune’s
 storms.

22

Around the ______ of Earth is an iron- and
magnesium-rich rock layer called the
_______.
core
 mantle.

23

________ that circle stars other than
Earth’s sun are called __________.
Planets
 exoplanets

24

The ______ belt can be found between
the planets _____ and Jupiter
asteroid
 Mars

25

Small bodies from which planets
originated during the early ______ of the
solar system are called ___________.
formation
 planetesimals.

THE END