Transcript What are the four inner planets?

What are the four inner planets?
Mercury, Venus, Earth, and Mars
What are the gaseous planets or
what planets are called “gas giants”?
Jupiter, Saturn, Uranus, Neptune
Which planets have rings?
Jupiter, Saturn, Uranus, Neptune
One astronomical unit (AU) is the
distance between…
Earth and Sun
Which is the largest?
Solar system, universe, or galaxy?
Universe
What is the largest planet in our
solar system?
Jupiter
What is the order of the planets
from the sun?
Mercury, Venus, Earth, Mars,
Jupiter, Saturn, Uranus, Neptune
Where is the asteroid belt
located?
Between Mars and Jupiter
How long does it take the Earth
to rotate once?
24 hours
What does Earth’s rotation on its
axis give us?
day and night
What is the imaginary line that a
planet spins around?
Axis
A light year is defined as…
The distance that light travels in
one year
Who was the first person in
space?
Yuri Gagarin (Russia)
How long does it take for the
Earth to revolve around the sun?
1 year
What is the sun?
A star
How long does it take the moon
to rotate once?
27 days
What scientist improved the
telescope and used this telescope to
see the moons of Jupiter?
Galileo
What astronomer was the “grandfather”
of science, believed the Earth was in the
center of the solar system, and said that
we can logically study planets, animals,
and people?
Aristotle
If there is a high tide at 2pm,
when is the next high tide?
2am
Which two ancient astronomers
believed the heliocentric theory
of the solar system?
Copernicus and Galileo
Which planet takes the longest
to revolve around the sun?
Neptune
What planet takes the shortest
time to revolve around the sun?
Mercury
In what direction do all of the
planets and the asteroid belt
revolve around the sun?
Counter clockwise
What is the name of the famous
comet that orbits clockwise
around the sun every 76 years?
Halley’s comet
How far is Earth tilted?
23.5 degrees
Earth’s tilt causes what?
Seasons
What is caused primarily by the
gravitational force between the
Earth, Moon, and Sun?
Tides
What planet is the smallest?
Mercury
Why does the Moon orbit Earth?
The gravitational attraction
between the Moon and the Earth
What layer of our atmosphere
burns up most meteors?
Mesosphere
What layer of our atmosphere
contains the ozone layer and
protects us against most UV
radiation from the sun?
Stratosphere
Why is Pluto a “dwarf planet”?
Because it cannot clear its own
orbit
What happens to the distances
between the planets going away
from the sun?
The distances increase
If you live in the Northern
Hemisphere and this hemisphere
is tilted away from the sun, what
season are you experiencing?
Winter
If you live in the Southern
Hemisphere and this hemisphere
is tilted away from the sun, what
season are you experiencing?
Winter
What part of Earth receives the
most direct sunlight?
The equator
What is a meteoroid that has
entered Earth’s atmosphere
called?
Meteor
What is frozen ball or ice, dust,
and gases called?
Comet
What is the path that the planets
travel called?
orbit
What is the rising and falling of
the ocean water levels on the
face of the Earth called?
Tides
What planets are 1 AU or less
from the Sun?
Mercury, Venus, and Earth
Why did scientists develop new
methods to measure distance in
space?
Because distances in space are so
large
When one celestial body moves into
the shadow of another celestial
body and is ether partially or totally
obscured by it, this is called what?
Eclipse
How long does the moon take to
revolve around Earth?
27 days
What is the movement of a
planet in an elliptical orbit
around the sun called?
Revolution
What happens to cause moon
phases?
Moon’s revolution around Earth
During which phase does the
Moon receive sunlight only on
the side facing away from Earth?
New moon
What makes Earth the
“Goldilocks” planet?
1. Perfect size = mass = gravity to keep us on the
planet
2. Tectonic plates = landforms
3. Water exists in all 3 states = essential to life
4. Magnetic field = protection against cosmic rays
5. Only planet known to sustain life
6. Protective atmosphere = stratosphere (ozone
layer); mesosphere (burn up meteors)
7. Perfect distance from sun = perfect temperature
What does “dark side of the
moon” mean?
The side of the Moon that Earth
doesn’t see
Why don’t we have eclipses
every month?
Moon’s orbit is tilted at 5
degrees and not always lined up
with Earth’s orbit
What would happen if the sun’s
gravity suddenly stopped?
Earth would go flying out in a
straight line
What are some characteristics
that the inner planets share?
rocky, terrestrial, small, no rings,
closer to the sun, before the
asteroid belt, faster revolution,
What are some characteristics
that the outer planets share?
gaseous, Jovian, large, rings,
farther to the sun, after the
asteroid belt, slower revolution,
moons
What project was responsible for
putting men on the moon?
Project Apollo: landed 12
humans on the moon between
1969 and 1972
What program sent the first
Americans into space in 1961?
Mercury Program
What was launched in 1990 and
produces images five times as
sharp as those from any
telescope on Earth?
Hubble Telescope
What probes used instruments
to see through the thick clouds
of Venus?
Pioneer Probes
What are the first useable
spacecraft in use since 1981?
Space shuttles
What landed on Mars and sent
back data about the planet’s soil
and atmosphere?
Viking 1 and 2
What event launched modern
space exploration in 1957?
Soviet launch of the satellite,
Sputnik 1
What space probe sent back
pictures of Jupiter, Saturn, and
Neptune?
Voyager Space Probes