Vocabulary
Rotation
the act of spinning on an axis
what is a constellation
a group of stars that forms a particular shape in the sky
At 9:00 am which direction should the shadow point?
West
What is gravity?
the attraction between objects based on the amount of matter they are made of
Revolution
the complete orbit of a planet around the sun or a moon around a planet
Polaris
North Star
At 3 pm which direction should the shadow point?
East
What causes two objects to fall at different times?
Air Resistance
celestial
something involving the sky
constellations you can see all year-round
Ursa Major
Cassiopeia
Ursa Minor
At noon which direction should the shadow point?
North
Why do objects all fall at the same time?
weight does not matter
axis
an imaginary line around which something rotates
Which constellation can only be seen in winter?
Canis Major
What time is a shadows length the shortest?
Noon
Which direction does gravity pull things?
Towards the Center of the Earth
apparent magnitude
how bright an object appears from Earth
Why does the position of constellations change throughout the year?
Rotation
Revolution
How can we use shadows to tell time?
Sundial facing North uses a gnomon to project a shadow on the mat overlapping a time.
Where is the center of gravity?
Center of the Earth