Science
The Sun and the Moon both influence the tides on Earth because of their _______________ pull on Earth.
gravitational
Which planet has some of the largest volcanoes in the solar system?
Mars
_____________ is the planet closest to the Sun.
Mercury
A ____________ is the distance light travels in _____ year.
light-year, one
____________ is the smallest planet.
Mercury
An _____________ is a day that has an equal amount of light hours and dark hours.
equinox
__________ are small, rocky, icy objects that orbit the Sun.
Comets
Uranus orbits the Sun at a distance of nearly how many astronomical units?
20
________ are small, rocky objects that orbit the Sun.
Asteroids
Saturn is the ____________ largest planet.
second
The _________ has more of an effect because it is so much closer to Earth than the Sun.
Moon
_________ planets orbit the Sun and are nearly spherical in shape, but they share their orbital paths with other objects of similar size.
Dwarf
On each ___________ of the Sun, the comet becomes smaller as some of the ice melts.
revolution
A galaxy is a huge collection of _____, _____, and ______.
stars, gases, dust
______________ rocks form when extreme temperatures and pressure within Earth change existing rocks into new rocks.
Metamorphic
Earth’s rotation affect hours of ______________.
daylight
The asteroid belt is located between ______ and __________.
Mars, Jupiter
A large sphere of hydrogen gas hot enough for nuclear reactions to occur in its core.
Star
Groundwater is water that is stored in ______ and pores beneath Earth’s surface.
cracks
When a meteoroid enters Earth’s atmosphere, it produces a streak of light called a ___________.
meteor
A ___________ is a day when the ________ is tilted toward or away from the Sun and has either the greatest or fewest number of __________ hours.
solstice, Earth, daylight
Crust is the brittle outer layer of the _____________ that is much thinner than the inner layers, like the shell on a hard-cooked egg.
geosphere
_____________ are naturally occurring, inorganic solids that have __________ structures and definite chemical compositions
Minerals, crystal
What are the outer planets, in the correct order from the Sun?
Jupiter, Saturn, Uranus, and Neptune
A _________ is a naturally occurring solid composed of minerals and sometimes other materials such as organic matter.
rock