Planet Formation
Yes/No
Q: Do all planets form from a disk of gas and dust around a young star?
Yes
Q: Are comets made mostly of ice and dust?
A: Yes
Q: Is Jupiter the largest planet in our Solar System?
Q: Is the Hubble Space Telescope located on Earth?
A: No
Q: Does gravity pull objects away from each other?
A: NO
Q: Which force is most responsible for pulling together dust and gas to form planets?
A. Magnetism
B. Solar radiation
C. Gravity
D. Wind
C. Gravity
Q: Where do most asteroids in our Solar System orbit?
A. Between Earth and Mars
B. Between Mars and Jupiter
C. Past Neptune
D. Inside the Kuiper Belt
A: B. Between Mars and Jupiter
(This region is called the Asteroid Belt.)
Q: What is the Great Red Spot on Jupiter?
A. A volcano
B. A frozen crater
C. A giant storm
D. A moon
A: C. A giant storm
Q: Why does the Hubble take clearer pictures than telescopes on Earth?
A. It’s closer to the stars
B. It uses special lenses
C. It’s above Earth’s atmosphere
D. It’s powered by the Sun
C. It's above Earth's atmosphere
Q: What happens to gravity if the distance between two objects increases?
A. It stays the same
B. It gets weaker
C. It gets stronger
D. It disappears completely
A: B It gets weaker
Q: What are planetesimals?
A. Small moons that orbit new planets
B. Clumps of rock and ice that grow into planets
C. Clouds of gas that form stars
D. Rings around gas giants
B.
Q: What causes a comet to grow a tail?
A. It crashes into a planet
B. Heat from the Sun melts its ice
C. Magnetic pull from Jupiter
D. It enters Earth's atmosphere
B. Heat from the Sun melts its ice, leaving a tail
Q: What is Jupiter mostly made of?
A. Ice and rock
B. Hydrogen and helium
C. Liquid water
D. Iron and nickel
A: B. Hydrogen and helium
Q: What types of objects has Hubble taken pictures of?
A. Only the Moon
B. Mostly satellites
C. Galaxies, nebulae, and distant planets
D. Underground caves
A: C. Galaxies, nebulae, and distant planets
Q: If the mass of one object doubles, what happens to the gravitational force?
A. It cuts in half
B. It doubles
C. It becomes zero
D. It triples
A: B. It doubles
Q: Which of the following shows the correct order of planet formation?
A. Nebula → Star → Rings → Meteors
B. Dust → Planet → Disk → Cloud
C. Gas cloud → Disk → Planetesimals → Protoplanets → Planets
D. Asteroids → Gravity → Orbits → Moons
C.
Q: How are asteroids and comets different?
A. Asteroids are icy and have tails; comets are rocky
B. Asteroids orbit the Sun backward; comets do not
C. Asteroids are rocky and mostly stay in the inner Solar System; comets are icy and come from farther out
D. Comets crash more often than asteroids
Answer: C
Q: Which of these is true about Jupiter’s internal structure?
A. It has a solid iron core like Earth
B. It’s hollow on the inside
C. It likely has a dense core surrounded by liquid metallic hydrogen
D. It has no layers at all
A: C. It likely has a dense core surrounded by liquid metallic hydrogen
Q: What major discovery has Hubble helped confirm?
A. That Earth is flat
B. That the universe is expanding
C. That Pluto is a gas giant
D. That the Sun is younger than Jupiter
A: B. That the universe is expanding
Q: Which of the following correctly explains Newton’s Law of Universal Gravitation?
A. Gravity only works on Earth
B. Only big objects like planets have gravity
C. All objects with mass attract each other, and gravity gets weaker with distance
D. Gravity pushes objects away from each other
A: C. All objects with mass attract each other, and gravity gets weaker with distance
Q: Why do gas giants form farther from the Sun instead of close to it?
A: Because it’s colder farther out, so gases and ices can stay solid and build up into massive planets.
Q: Why do we only see a comet's tail when it's near the Sun?
A: Because solar heat causes the ice to vaporize and release gas and dust, forming the tail.
Q: Why don’t we stand on the “surface” of Jupiter like we can on Earth or Mars?
A: Because Jupiter is a gas giant and has no solid surface — it’s made of thick gases and liquids.
Q: Why do scientists keep using Hubble even though newer telescopes exist?
A: Because it still sends high-quality data from space and has a long record of discoveries.
Q: If the gravitational force between two objects is 100 N, what happens to the force if the distance between them is doubled?
A: The force becomes 25 N, because doubling the distance reduces gravity by 2^2 = 4 so 100N/4 is 25N!!!