The planets
Other solar system objects
Gravity
Galaxies
Misc
100
Name the biggest planet and the smallest
Jupiter and Mercury
100
Name of the objects between Mars and Jupiter
Asteroid Belt
100
As the distance between two objects increases, the force of gravity______.
decreases
100

This galaxy is shaped like a fuzzy football and has many old stars.

Elliptical Galaxy

100

What is an AU? (Word and definition).

Astronomical Unit- The distance from the Sun to Earth.

200
Name all of the planets from the Sun out
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
200
Name three dwarf planets
Ceres, Pluto, Charon Makemake, Eris
200

___________ causes gases to cast off and clump together to begin forming new stars and planets.

Gravity

200

A huge collection of gas, dust, and STARS held together by gravity.

Bonus: What is the name of our galaxy and the type?

Galaxies


Milky Way; spiral

200

What two factors affect gravitational pull, and how does this work?


Think stronger/shorter and weaker/farther.

Mass and Distance

Greater mass/shorter dis= Stronger

Less Mass/ longer dis= Weaker

300

What is the difference between rotation and revolution?

Rotation is the spinning of an object on its own axis. 

Revolution is the movement of an object around another object along an orbit.

300
These are actually not shooting stars but burn up as they go through our atmostphere.
meteors
300
What two forces need to be in balance for an object to orbit around another object?
The forward motion ( velocity) and the force of gravity from the object it is orbiting around.
300

What is the name of the spiral galaxy we are inching towards every year- 400 Million years left!

Andromeda

300

Do galaxies move?

Yes actually. Everything in space moves- rotates and revolves.

400
Name the gas giants
Saturn Neptune Jupiter Uranus
400
Comets are bodies of rock, ice and dust that orbit the sun. What part of the comet always faces the sun in its orbit?

The Coma/nucleus

400
The outer planets are farther from the Sun. This is why they orbit ____________ than the inner planets.
slower
400

This type of galaxy has no clear shape and looks messy or uneven. and has clusters of new stars.

Irregular

400

How can someone infer the size of a planet?

How many moons a planet can capture due to its gravity.

500
All planets orbit around the Sun, which contains over ____ % of the mass of the solar system.
99
500

Long period comets come from the ________ cloud.

 Short period comets come from the ______ belt (Pluto's home).

OOrt Cloud

Kuiper Belt

500

Why don't all objects, like a feather and a marble, fall at the same speed, if the acceleration due to gravity is the same for all objects?

air resistance varies on different objects.

500

Describe the 5 steps of a solar system formation.

1. Nebula Forms — A giant cloud of gas and dust called a nebula begins to collapse because of gravity.

2. The Cloud Spins and Flattens — Gravity pulls the cloud inward, causing it to spin faster and flatten into a disk. The Sun begins forming at the center.

3. Dust and Rock Clump Together — Tiny particles collide and stick together, forming larger chunks called planetesimals.

4. Planets Begin to Form — Planetesimals collide and combine to form larger objects called protoplanets, which eventually develop into planets.

5. The Solar System Takes Shape — The Sun and planets become established, while leftover material forms asteroids, comets, and other small objects.

Memory trick: Nebula → Spin → Clump → Planets → Solar System

500

What would happen to Earth if the Sun's gravitational pull was not there to keep the Earth in orbit?

The Earth would continue moving in a straight line, until it was hit by a more massive object.

M
e
n
u