Abeka 3rd Grade Science Quiz 4
What star des all the planets of our solar system orbit?
the sun
solar system
the sun and all the heavenly bodies that orbit it
Milky Way Galaxy
the system of stars our solar system is a part of
Which planet takes the longest time to orbit the sun? Why?
Neptune (165 Earth years); It is the farthest from the sun.
Why does it seem that the stars are moving?
The earth is rotating on its axis
What makes Mars uninhabitable?
There is no liquid water and almost no oxygen; it is too cold; it does not have a water cycle; its year is too long for a growing season
Why do stars give heat and light energy?
They are made of hot, glowing gases.
constellation
a group of starts that makes a picture; Orion, Big Dipper, Little Dipper...
star
a heavenly body that is a giant ball of hot, glowing gas
planet
a large heavenly body that orbits the sun
heavenly body
a natural object in space (the universe); sun, moon, stars, and planets; created by God
What makes a year?
a planet's full orbit around the sun
What shape does the Milky Way look like?
a spiral
What does a planet orbit?
a star
North Star
a star almost always located above the North Pole
What is the sun?
a star; the star at the center of our solar system
Venus
2nd planet from the sun; hottest and brightest planet; thick atmosphere made mostly of carbon dioxide and other gases trapping its heat; Earth's "twin"
How many days does it take for the earth to orbit the sun?
365 1/4
Earth
3rd planet from the sun; only planet designed for life
Mercury
closest planet to the sun; smallest planet
How many planets are in our solar system?
eight ~ Mercury, Venus, Earth, Mars, Jupiter, Uranus, Saturn, Neptune (Pluto is a Dwarf Planet)
What keeps the planets orbiting the sun?
gravity
Uranus
has rings; only planet tipped on its side
Saturn
largest planet with rings made up of ice or rock; cold and stormy
What two forms of energy does the sun give?
light and heat
Neptune
looks blue because of a gas in its atmosphere
outer planets
Gas Giants; Jupiter, Saturn, Uranus, and Neptune
Why is Mercury either too hot or too cold?
It has no atmosphere.
Why is Mercury's year so short? (88 Earth days)
It is closest to the sun.
Why is Neptune's year so long? (165 Earth years)
It is the farthest planet from the sun.
Which planet takes the shortest time to orbit the sun? Why?
Mercury (88 Earth days); It is the closest to the sun.
What is the Great Red Spot?
Storm on Jupiter that could fit Earths inside; has lasted at least 300 years
What are galaxies made of?
stars, gas, and dust
habitable
suitable for life
Which is bigger, the sun or the earth?
sun
Mars
the Red Planet; covered with rusty-colored rocks and dust
orbit
the continual path one heavenly body has around another; the path around the sun by each planet
axis
the imaginary line at which Earth continually spins, or rotates
Jupiter
the largest planet of our solar system; at least 79 moon
inner planets
the planets closest to the sun having solid surfaces; Mercury, Venus, Earth, and Mars