Show:
Vocabulary 1
Vocabulary 2
Main Idea 1
Main Idea 2
Critical Thinking
100
What is a relatively small, rocky object that orbits the Sun?
Asteroid
100
The Sun and all the bodies that travel around it
Solar System
100
What stage is our star currently in?
main-sequence star
100
How many stages are in a star's life cycle? (not including the Black Dwarf stage)
6
100
The Greeks thought that the ____________ was in the center of the universe.
Earth
200
What is a small orbiting body made of dust, ice, and frozen gasses?
Comet
200
Dark areas on the Sun's surface
Sunspots
200
What keeps the planets in their orbits around the Sun?
Gravitational attraction
200
Name at least 5 objects that make up the solar system
Sun, planets, moons, asteroids, dwarf planets, comets, meteors
200
The Greeks thought that the Earth was in the center of the universe. What is this model called?
Geocentric model
300
The first foud planets from the Sun are called ____________.
Inner Planets
300
The attraction between Earth and objects at or near its surface
Gravity
300
Name the inner planets and two characteristics of these planets
Inner planets: Mercury, Venus, Earth, Mars Characteristics: small and rocky
300
Name the first 4 stages in a star's life cycle
nebula, protostar, main-sequence star, red giant
300
Copernicus thought that the ____________ was in the center of the universe.
Sun
400
What are large bodies that revolve around the Sun or another star?
Planets
400
A chunk of matter that enters Earth's atmosphere and is heated by friction with the air
Meteor
400
Name the outer planets and two characteristics of these planets
Outer planets: Jupiter, Saturn, Uranus, Neptune Characteristics: large, gas giants
400
Name the last 3 stages in a star's life cycle
planetary nebula, white dwarf, black dwarf
400
Copernicus thought that the Sun was in the center of the universe. What is this model called?
Heliocentric model
500
A huge system of gas, dust, and stars
Galaxy
500
Jupiter, Saturn, Uranus, and Neptune are all ________
Outer Planets
500
What is the source of the Sun's energy?
Nuclear reactions, or nuclear fusion
500
Name the stage our sun is currently in
Main-sequence star
500
What would happen if the Sun's supply of hydrogen is used up?
Hydrogen is the fuel used to generate the Sun's energy. If it is used up, the Sun will become a Red Giant and it will begin to die.