Category 1: Comets
These small celestial objects are made of ice, dust, and gas.
What are comets?
This planet is closest to the Sun.
What is Mercury
These form at divergent boundaries when tectonic plates move apart.
What are ocean basins?
This is the percentage of oxygen in Earth's atmosphere.
What is 21%?
Moons in elliptical orbits move fastest when they are this distance from the planet they orbit.
What is closest?
Comets can develop their tails in these regions far from the Sun.
What are the Kuiper Belt or Oort Cloud?
The gas giants in the Solar System include these four Jovian planets.
What are Jupiter, Saturn, Uranus, and Neptune?
Volcanic activity occurs here, where plates collide or move apart.
What are convergent and divergent boundaries?
Earth is in this zone, where conditions might be right for liquid water to exist.
Earth is in this zone, where conditions might be right for liquid water to exist.
As the distance between the Earth and the Moon increases, this happens to the Moon’s orbit.
What is the Moon’s orbit slows down?
These regions of the Solar System are known for containing comets in elliptical orbits.
What are distant regions like the Kuiper Belt and Oort Cloud?
This is the order of the four inner planets, from closest to farthest from the Sun.
What is Mercury, Venus, Earth, Mars?
This geological feature provides evidence of plate movement through alternating magnetic bands along the Mid-Atlantic Ridge.
What are magnetic pole reversals?
Earth’s atmosphere must be this, neither too thick to trap heat nor too thin to protect from radiation.
What is balanced?
The Sun's dynamic features, like these, are visible from Earth.
What are sunspots, solar flares, and prominences?
The release of gas and dust forms this feature when comets approach the Sun.
What is a tail?
These four planets are classified as rocky.
What are Mercury, Venus, Earth, and Mars?
Fossils of this reptile provide evidence for continental drift between South America and Africa.
What is Mesosaurus?
Earth’s atmosphere regulates temperatures and protects life by doing this.
What is temperature regulation and protection from harmful radiation?
This force increases with mass and decreases with distance between objects.
What is gravitational force?
This is what causes a comet’s tail to form as it gets closer to the Sun.
What is heat from the Sun?
The fourth planet from the Sun, known for its reddish appearance.
What is Mars?
This type of plate boundary occurs when plates slide past each other, often causing earthquakes.
What is a transform boundary?
Earth requires this in its atmosphere for life to thrive.
What is a stable atmosphere?
This is what the Sun releases constantly.
What is energy and light?