Unit 8 Vocabulary

5.ESS1.5

100

any round object that has a surface that is the same distance from its center at all points, for example, a ball or globe

sphere

200

one half of a sphere or globe. The Earth is divided at the equator into the Northern and Southern

hemisphere

300

an imaginary line around the middle of the Earth, at an equal distance from the North Pole and the South Pole

equator

400

a real or imaginary straight line about which something turns. The imaginary line of the Earth passes through the North and South Pole

axis

500

the path followed by a planet, moon, or other heavenly body as it travels around another body. The path of the Earth around the Sun is an orbit

orbit

5.ESS1.6

100

to turn around a center point or axis. The Earth does this on its axis

rotate

200

without turning or stopping; straight; the shortest way

direct

300

not straight; by a longer way

indirect

400

either of two times of the year when the sun is farthest from the equator in the north or south

solstice

500

either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length

equinox