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WorksheetsPlanets
Total questions: 78
Worksheet time: 51mins
Which is the smallest planet?
Mars
Venus
Neptune
Mercury
Which moon phase is this?
First Quarter
Full Moon
Waning Gibbous
Waxing Gibbous
The earth________ around it's axis (another word for spin)?
Revolves
Jumps
Rotates
Skips
How many moons does Earth have?
1
2
3
4
What is the name of this planet?
EARTH
MERCURY
MARS
VENUS
It's a big star that give us light.
SUN
MERCURY
MARS
VENUS
This planet has rings.
SATURN
MERCURY
MARS
VENUS
The biggest planet is...
JUPITER
EARTH
MARS
VENUS
New Moon phase also means ____________.
Full Moon
Quarter Moon
No Moon
Which inner planet has only a thin atmosphere?
Mercury
Venus
Mars
The name of our galaxy is...
The Farm
Galaxy War
The Universe
Milky Way
How many planets does the solar system have?
1
9
5
8
This planet is also called "The Red Planet"
JUPITER
EARTH
MARS
VENUS
The center of our solar system is the....
Earth
Sun
Moon
Asteroid belt
There are _________ planets in our solar system.
6
7
8
9
The _________ is a region between the planets Mars and Jupiter containing thousands of rocky objects that orbit the Sun.
dwarf planets
comets
Asteroid belt
Kuiper belt
Oort cloud
The _______ exists much further out than the Kuiper belt and is at the very edge of the Solar System. Scientists believe it is made up of thousands of small ice objects.
dwarf planets
comets
Asteroid belt
Kuiper belt
Oort Cloud
About 99.85% of the mass of the solar system is the __________.
Asteroid belt
Sun
Moon
planets
The inner and outer planets are separated by the __________.
asteroid belt
moon
comets
dwarf planets
What holds the planets in their orbits around the sun?
gravity
speed
string
air currents
Does this graph show relative size or distance from the sun of the planets?
It shows both size and distance.
It does not show size or distance.
It shows distance from the sun
It shows relative size.
This table shows the rotation period and revolution period for 6 planets, and Earth’s moon, all relative to Earth’s periods. Which 2 planets have shorter days than Earth?
Jupiter and Saturn
Venus and Mercury
Mars and Jupiter
Saturn and Moon
a small rocky body orbiting the sun, ranging from the size of a small house to dust particles
nebula
terrestrial planets
collision
asteroids
What is the primary component of the Sun's composition?
Oxygen
Hydrogen
Carbon
Helium
the astronomical model in which the Earth and planets revolve around the Sun at the center of the Solar System.
Aristarchus
accretion
nebula
heliocentric system
Which planet in the solar system is known for its prominent ring system?
Mercury
Venus
Saturn
Mars
Which planet is known as the 'Red Planet' due to its reddish appearance?
Jupiter
Mars
Venus
Neptune
How old is the Milky Way?
13.7 billion years old
12 billion years old
13.7 million years old
13.7 trillion years old
What galaxy do we live in?
Irregular Galaxy
Spiral Galaxy
Elliptical Galaxy
The toilet
What holds a galaxy together?
pressure
glue
gravity
planets
Which type of galaxy is a flat, rotating disk of billions of stars, gas and dust with a central concentration of stars?
Spiral
Elliptical
Irregular
Triangular
Where are we located within our galaxy?
On one of the spiral arms
On the outer edge
In between 2 of the spiral arms
In the center bulge
The classification of Galaxy is based on its observable characteristics. Which of these characteristics is used to classify galaxies?
shape
temperature
types of forces
chemical elements
Our solar system began when...
The Big Bang happened
an ancient star exploded around 5 billion years ago
every other solar system began
a huge explosion occurred 15 billion years ago
What is the fuel for the sun's energy?
The fusion of hydrogen atoms into helium
The gravitational pull on the planets
Solar wind
The nebulae
Where in our solar system would you expect to find a planet that is mostly made of gas?
very close to the sun
outside of the sun's gravitational pull
very far from the sun
very close to other planets
What theory describes the formation of our solar system?
The Big Bang theory
The theory of general relativity
The solar nebular theory
The theory of evolution
What process created the plantesimals (the young version of our planets)?
Accretion of particles in the solar nebula
Gravitational pull between the sun and the planets
The solar wind that blew dust to the outer edge of the solar system
Nuclear fusion
Where would you expect to find a planet that is small, dense, and rocky?
close to the sun
outside of the sun's gravitational pull
far away from the sun
close to the gas planets
Which letter in this diagram shows our modern solar system with planets orbiting around the sun?
a
b
c
d
e
Which letter in this diagram shows the nebula that was left over after an ancient star exploded?
a
b
c
d
e
What is the word for a cloud of dust and gas in space?
solar system
nebula
galaxy
black hole
What word can we use to describe planets that are in the process of forming through accretion?
planetesimals
dwarf planets
asteroids
meteors
How does gravity work according to the theory of general relativity?
All objects in the universe exert a uniform force on each other
Massive objects and smaller objects warp space time the same way
The collisions of small objects in space create gravity
Massive objects warp space-time around them
When the sun formed, it blew most of the gasses towards the edges of the solar system. What evidence of this do we see today?
the gas planets are very close to the sun
the gas planets are very far from the sun
there is no gas at all on planets close to the sun
there is a huge nebula of gas on the edge of our solar system
Astronomers think that the solar system formed from an interstellar
rocks
clouds
explosions
debris
The density of gas in a collapsing interstellar cloud is low at first, but ____________________draws matter together until it is concentrated enough to form a star and possibly planets.
space
mass
gravity
dust
Where is the concentration of matter the densest as an interstellar cloud collapses?
A
B
C
The Sun formed when the dense concentration of gas and dust at the center of a rotating disk reached a temperature and pressure high enough to fuse hydrogen into
carbon
lava
helium
The rotating disk surrounding the young Sun became our
moon
planet
comet
solar system
Space objects built of solid particles that can form planets through collisions and mergers are called
comets
asteroids
planetesimals
Theories of the origin of the solar system rely on direct ___________________ and data from probes.
satellites
observations
stories
Select all that apply
Which are true about the terrestrial planets?
They formed by the merging of planetesimals in the inner part of the main disk.
They are composed of elements that did not vaporize.
They formed by the merging of icy planetesimals near the outer part of the main disk.
They are rocky and dense.
Early astronomers thought that the Sun, planets, and stars orbited a stationary Earth . This is known as the __________________ model of the solar system.
Heliocentric
Disk
Geocentric
Kepler
Which are space objects built of solid particles that can form planets through collisions and mergers?
asteroids
meteoroids
planetesimals
comets
The apparent backward movement of a planet is called
retrograde motion
gravity
spin
In the heliocentric model, what is at the center of the solar system?
Earth
Mars
The moon
The Sun
The gas giants formed through the merging of icy _________________ that contained mostly lighter elements.
clumps
stars
planetesimals
Select all that apply
Which factors determine the force of gravitation between two bodies?
distance between the objects
composition of the objects
volumes of the objects
masses of the objects
Early astronomers thought that all objects in space orbited Earth. What is the name for this early model of the solar system?
Copernican model
heliocentric model
geocentric model
Keplerian model
Copernicus suggested that Earth and all the other planets orbit the Sun . This is known as the ___________________ model of the solar system.
suncentric
geocentric
heliocentric
