Day, Night, and Earth's Rotation
an imaginary line that goes through the North Pole and South Pole of the Earth
What is an axis?
one of four main directions; if you are facing north, it is the direction behind you
Which direction is south?
a group of stars in the night sky that form a pattern
What is a constellation?
moon phase when the Moon looks like a sliver
What is the crescent moon?
a large, round object in outer space that orbits a star
What is a planet?
one of four main directions; when you face this direction, west is to the left and east is to the right
Which direction is north?
to spin or turn around a central point, like the Earth around its axis
a large, round object in the night sky that can reflect the Sun's light
What is the Moon?
moon phase when the Moon looks like a little less than a full circle
What is the gibbous moon?
a pretend version of something that scientists use when the real thing is too big, small, or complicated to work with
one of four main directions; if you are facing north, it is to the left
Which direction is west?
moon phase when the Moon looks like a circle
What is a full moon?
the part of the Moon that we can see on a particular night
to spin or turn around a central point, like the Earth around its axis
What is rotate?
a tool that tells time by using the changing direction of shadows caused by the Sun's movement across the sky
What is a sundial?
a time of year with specific weather that repeats every year
What is a season?
moon phase when the Moon looks like half of a circle
What is a half moon?
something that happens again and again and again in a way that can be predicted
What is a pattern?
the distance around a circle
What is the circumference?
one of four main directions; if you are facing north, it is to the right
Which direction is east?
circling another object, like the Earth around the Sun
What is orbit (revolve)
a set of events that repeats in the same order over and over
What is a cycle?
moon phase when the Moon looks completely dark
What is a new moon?