Show:
Layers of the Earth
Our Solar System
Comets
Meteors
The Universe
100
The outermost layer of Earth, on which life is sustained.
What is the crust?
100
This is the center of our solar system, around which all bodies orbit.
What is the Sun (or our star)?
100
All comets face towards this celestial body.
What is the sun?
100
A chunk of a meteor that has reached Earth's surface.
What is a meteorite?
100
This celestial object is the center of a solar system.
What is a star (sun)?
200
The second layer of Earth on which the crust floats.
What is the mantle?
200
This is the order of the four interior (or terrestrial) planets, from the sun outward.
What is Mercury, Venus, Earth and Mars?
200
This part of a comet has the same name as the control center of all living cells.
What is a nucleus?
200
Also commonly called a falling or shooting star, this is a piece of dust or rock as it enters Earth's atmosphere.
What is a meteoroid?
200
A grouping of solar systems in the same region of space.
What is a galaxy?
300
The third layer of Earth from the crust down.
What is the outer core?
300
This is the order of the four outer (or gas giant) planets, from the closest to the sun outward.
What is Jupiter, Saturn, Uranus, and Neptune?
300
These are the three main parts of a comet.
What are the coma, ice (or ion) tail, dust tail and nucleus?
300
A chunk of rock, minerals, or dust that is traveling through space without a set orbital pattern.
What is a meteoroid?
300
The entire grouping of all celestial bodies, solar systems, and galaxies; also known as the cosmos.
What is the Universe?
400
Both the inner and outer core are comprised of these two minerals.
What is nickel and iron?
400
This region of the solar system creates a boarder separating the inner and outer planets.
What is the asteroid belt?
400
This is the origin of short-period comets (those that orbit for less than 200 years).
What is the Kuiper Belt?
400
The size at which a rock or mineral chunk in space is no longer considered a meteoroid, and is considered an asteroid.
What is 1 meter across or larger?
400
The region of space-time from which gravity prevents anything from escaping (including light).
What is a black hole?
500
These currents are present in the Earth's mantle and create seismic activity as well as tectonic movements.
What are convection currents?
500
These are the three qualifications that make a planet a planet, and not a dwarf planet, or asteroid.
What is: 1) orbits the sun 2) its gravity is strong enough to give it a spherical shape 3) has cleared the neighborhood around its orbit?
500
This is the place of origin of the longer-period (those that orbit for longer than 200 years) comets.
What is the Oort Cloud?
500
These are the two most common sources of meteoroids?
What is the dust from a comet tail, or material from the asteroid belt?
500
The theorized center of all galaxies.
What is a supermassive black hole?