Lesson 1
Earth moving around the sun; it takes about 365 days.
What is a revolution?
These planets orbit the Sun and are nearly spherical in shape, but they share their orbital paths.
What are dwarf planets?
A large sphere of hydrogen gas that is hot enough for nuclear reactions.
What are stars?
The spin of an object on its axis; causes day and night.
What is rotation?
The phases of the Moon when the lit portion of the moon becomes larger.
What are waxing phases?
True or False: Earth's tilt as it relates to the Sun changes.
What is false?
Small, rocky objects that orbit the sun; most are located in a belt between Mars and Jupiter.
What is an asteroid?
States that the universe began from one point and has been expanding and cooler ever since.
What is the Big Bang Theory?
A massive body that is nearly spherical and orbits the sun; no other large object is in its orbital path.
What is a planet?
Small rocky, icy objects that orbit the sun; they form a "tail" as they near the Sun.
What is a comet?
The distance between Earth and the Sun.
What is an astronomical unit (AU)?
A meteoroid that has entered Earth's atmosphere and produced a streak of light.
What is a meteor?
A huge collection of stars, gas, and dust.
What is a galaxy?
The movement of one solar system object into the shadow of another object.
What is an eclipse?
Earth's rotation axis is tilited directly toward or away from the Sun; marks the start of summer and winter.
What is a solstice?
A type of tide that occurs during new and full moons; there is a large difference between high and low tides.
What are Spring tides?
Outer planet; the largest planet; has the fastest rotation of all the planets.
What is Jupiter?
The hottest stars are this color.
What is blue?
Earth's rotation axis is tilted neither toward nor away from the sun; marks the beginning of spring and fall.
What is an equinox?
A meteoroid that has impacted Earth.
What is a meteorite?
Occurs during a new moon; the Moon appears to completely or particially cover the Sun
What is a Solar Eclipse?
One of the inner planets that is half the size of Earth, is red in color, and has the largest volcanoes.
What is Mars?
This type of galaxy is oddly shaped, contains large amounts of gas and dust, and they have the highest rate of star formation.
What is an irregular galaxy?
Small, rocky particles that move through space.
What are meteoroids?
First quarter and last quarter moons cause this; high tides are lower than usual and low tides are higher than usual.
What are neap tides?