19.20 Astronomy 4th grade

From midnight to noon. (morning)

• a.m.

• p.m.

• moon phases

• orbit

A person who studies stars, planets and other objects in the sky.

• sunrise

• astronomer

• meteorologist

An imaginary line that runs through both poles of a planet.

• vertical line

• horizontal line

• axis

The force that pulls two objects toward each other.

• friction

• gravity

• J.J. Watt

• spring scale

The time it takes for the Moon to complete on full orbit around Earth. (29 1/2 days)

• Moon phases

• year

• Lunar cycle

The different shapes the Moon appears to have in the sky when observed from Earth.

• Moon phases

• lunar cycle

• solar eclipse

To go around another object.

• orbit

• rotate

• spin

From noon to midnight.

• a.m.

• p.m.

• the time you are at school.

The spinning in place on an axis.

• Rotation

• orbit

The four divisions of the year, marked by particular weather patterns and daylight hours.

• lunar cycle

• seasons

• astrology