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Gravity and the Solar System (TCI) Flashcards | StudBud
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Gravity and the Solar System (TCI)
Gravity and the Solar System (TCI)
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1
Which of these statements is NOT true of dwarf planets?
Dwarf planets are in direct orbit around the sun.
Dwarf planets have cleared the neighborhood around their orbit.
Dwarf planets have a nearly round shape.
Dwarf planets share their orbit with many large objects.
2
At about what speed does the Earth move around the sun?
30 km/s
1 km/s
4,000 km/s
100 km/s
3
What is gravitational force?
an elastic force that causes planets to expand
a destructive force that creates radiation in the solar system
a conductive force that helps light travel through the solar system
an attractive force between all objects that have mass
4
Why do planets have a nearly spherical shape?
Planets will form in the shape of the stars they revolve around.
Gravitational forces in large objects pull matter toward their centers.
A planet’s rotation causes it to become round over time.
Gravitational forces around large objects push matter outward.
5
Which of these is
NOT
a requirement for a celestial object to be considered a planet?
It has to clear its neighborhood.
It has to attract matter as it moves.
It has to have a moon.
It has a nearly spherical shape.
6
A comet is a large body in space that has a spherical shape and a clear orbit around a star does not produce light
False
True
7
Gravity is an invisible force
True
False
8
Which planet exerts the strongest gravitational force in our solar system?
Mars
Earth
Saturn
Jupiter
9
Which planets are more likely to form systems of moons?
smaller planets
planets closest to the sun
massive planets
planets farthest away from the sun
10
What does the strength of gravitational force depend on?
mass and distance
shape and distance
mass and speed
shape and speed
11
Why is a scale model of a system helpful to scientists?
Scale models help to understand why moons fall into orbit around planets.
Scale models, help to understand gravity.
Scale models help to understand the relative sizes and distances of planets
12
A moon is
only visible from Earth
a celestial object that indirectly revolves around a star
A planet
13
All planets rotate from west to east.
False
True
14
a small rocky or metallic body orbiting the sun
moon
comet
planet
asteroid
15
A solar system is a system
made up of a star and all the objects that travel around it.
that includes a star, planets, and their moons.
in which only planets travel around a star.
that includes only the sun, Earth, and moon.
16
Why does Earth constantly revolve around the sun?
Earth is pushed away from the sun due to the heat waves .
Earth is attached to the sun by a gravitational force
Earth’s speed allows it to resist the pull of the gravitational force
Earth is caught in the gravitational force between Venus and Mars
17
Which of these statements is true regarding the number of moons in the solar system?
Planets in the solar system never have more than five moons
All moons in the solar system have been discovered.
There are no planets that do not have a moon.
Planets in the solar system have different numbers of moons.
18
A planet is object that directly revolves around a star, has a nearly spherical shape, has cleared it's neighborhood
True
False
19
Which gravitational force is strongest?
The force on a baseball from Earth.
The force on a baseball from the moon.
The force on a baseball from a person’s hand.
The force on a baseball from a nearby book.
20
Neptune the hardest planet to see because it is
very dim and similar in appearance to the stars.
too close to the sun.
blocked from view by its moons.
blocked by an asteroid field.
