Gravity & Forces
What two factors determine the strength of gravity between two objects?
What is mass & distance
What is a galaxy?
What is a huge group of stars, gas, and dust held together by gravity.
What is the name of the theory explaining how our solar system formed from a cloud of gas and dust?
What is the big bang theory/ Nebular theory.
What is rotation?
What is An object spinning on its axis.
A model shows a ball swinging in a circle on a string. What force does the string represent in the Sun–Earth system?
What is Gravity.
If two satellites move farther apart, what happens to their gravitational attraction?
What is it decreases
Name the three main galaxy shapes.
What is Spiral, elliptical, and irregular.
What force caused the original gas and dust cloud to collapse?
What is Gravity.
What is revolution?
What is An object traveling around another object
Which has weaker surface gravity: the Moon or Jupiter?
What is The Moon.
Two equal-sized worlds are different in mass. Which one generally exerts more gravitational pull?
What is the world with more mass.
What shape is an elliptical galaxy?
What is Round or oval, without spiral arms.
What kinds of materials mainly make up the inner planets?
What is Rock and metal.
Which takes about 24 hours on Earth: one rotation or one revolution?
What is One rotation.
On a graph, the gravity curve drops as distance increases. What relationship does it show?
What is farther apart means weaker gravity.
Why does a dropped pencil fall toward Earth instead of flying toward the Sun?
What is Earth's gravity is stronger.
What features help identify a spiral galaxy?
What is a bulge and spiral arms
Why are distant planets generally colder than planets close to the Sun?
What is less energy from the Sun.
A planet has a wider orbit than Earth. Would its year generally be longer or shorter?
What is Longer.
Mars and Earth have day lengths near 24 hours, but Venus rotates very slowly. What quantity is being compared? Rotation or Revolution period?
What is Rotation periods.
A probe passes near a planet. How might the planet’s gravity change its path?
What is it pulls the probe toward the planet.
Where is our solar system located within the Milky Way?
What is it's arm.
What violent stellar event can spread heavy elements into space?
What is a supernova explosion.
As distance from the Sun increases, what usually happens to orbital speed and orbital period?
What is Orbital speed decreases, and orbital period increases.
A table shows that planets farther from the Sun take more days to complete an orbit. What does this represent?
What is Orbital period increases with distance from the Sun.