Planets
Where is Earth in our solar system?
3rd
How many moon phases are there?
8
How many seasons are in one year? List them in order.
4: spring, summer, fall, and winter
Pluto is an exoplanet
true or false
false
A comets tail glows in the suns light
True or False
True
Why are plants spherical?
gravity pulls all their mass equally toward the center
The moon is our ONLY natural satellite
True or Flase
True
Define rotation of earth
he planet spinning on its imaginary axis, completing one full turn approximately every 24 hours
What is an exoplanet?
A planet that orbits a different star than our sun
A meteor is a star
True or False
False
List the planets in order
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
List the moon phases in order
New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third (or Last) Quarter, and Waning Crescent
Define revolution of earth
its year-long journey, or orbit, around the Sun in an elliptical path, taking approximately 365.25 days
What is an asteriod?
very small, irregularly shaped, rocky bodies
What is a comet?
small, icy objects that have very elliptical orbits around the Sun
What is a terrestrial planet? List them
a rocky, Earth-like planet composed primarily of silicate rocks or metals with a solid, hard surface
Mercury, Venus, Earth, Mars
How much of the moon is lit up during a 1st or 3rd quarter
Half
an imaginary line at 0° latitude, circling the Earth's center, dividing it into the Northern and Southern Hemispheres
The equator
What are the two ways we most commonly discover an exoplanet?
a very slight motion of a star that must be caused by the pull of a planet. (Radial method)
the partial dimming of a star’s light as the planet passes in front of it. (transit method)
Define meteoroid
a small rock in interplanetary space that has not yet entered Earth's atmosphere.
What is a gas giant? List them
a large planet composed primarily of hydrogen and helium, featuring thick atmospheres, small rocky cores, and no solid surface
Jupiter, Saturn, Uranus, Neptune
About how long does it take the moon to make one revolution around the Earth?
About 27.3 days
What is the axis of Earth?
an imaginary straight line passing through the center of the planet from the North Pole to the South Pole
What is the only way an asteroid can be changed?
A collision
Where do comets come from?
Kuiper belt and Oort clouds