Planets Flashcards
What is the first characteristic of the inner planets?
Sillalter
What is the second characteristic of the inner planets?
Shorter revolution
What is the third characteristic of the inner planets?
Closer
What is the fourth characteristic of the inner planets?
Rocky
What is the fifth characteristic of the inner planets?
More dense
What are 5 characteristics of the outer planets?
- Bigger
- Less dense
- Made of mostly gas
- Longer revolution
- Farther apart
What force causes the planets to orbit our solar system?
Gravity
What is gravity?
The natural force of attraction exerted by a celestial body on the mass of objects that are on or near its surface.
How does the mass of an object affect gravity?
The greater the mass of an object, the more gravitational force it has on other objects around it.
How does the distance between 2 objects affect the force of gravity?
The closer they are, the more gravity they have.
How do planets move around the sun?
Planets move counter-clockwise around the sun.
How do planets spin on their axis?
Planets spin on their axis counterclockwise (except Uranus and Venus).
What shape are the orbits of planets?
Planets have elliptical shaped orbits.
What keeps planets in their orbit?
The sun’s gravity keeps planets in their orbit.
What are the four largest moons of Jupiter?
The four largest moons of Jupiter are Io, Europa, Callisto, and Ganymede.
