SC5S2U1 Unit Vocabulary

A force of attraction that pulls objects without them touching. Earth's _________ pulls objects near its surface toward Earth's center.

• Gravity

• Meteor

• Orbit

• Apparent brightness

The streak of light that a chunk of rock falling from space toward Earth produces.

• Gravity

• Meteor

• Orbit

• Apparent brightness

A curved path that an object makes around another object.

• Gravity

• Orbit

• Meteor

• Apparent brightness

A measurement describing how bright a star looks from Earth.

• Gravity

• Orbit

• Apparent brightness

• Meteor

A unit of measurement used to describe distances between stars in space. One ________ is the distance that light travels in one year.

• Light-year

• Axis

• Rotate

• Rotation

The imaginary line that Earth rotates around. Earth's _____ goes through the middle of Earth from the North Pole to the South Pole.

• Light-year

• Rotate

• Axis

• Rotation

To spin. Earth ______ around its axis.

• Light-year

• Rotate

• Axis

• Rotation

A complete spin. Earth makes one _______ every 24 hours.

• Light-year

• Rotate

• Axis

• Rotation

A part of the world where the same standard time is used. There are 24 ______ in the world, one for each hour in the day.

• Astronomer

• Shadow

• Time zone

• Sundial

An area of darkness that forms when light from any source is blocked. _______ caused by the sun change in regular patterns.

• Astronomer

• Shadow

• Time zone

• Sundial