Show:
Earth
Sun
Moon
This and That
Vocabulary
100

This causes the Earth's seasons.

What is the tilt of the Earth?

100
The word "solar" refers to this object.
What is the "sun"?
100
It takes this long for the moon to revolve completely around the Earth.
What is 29 days or about a month?
100
This keeps the Earth and moon in their orbits.
What is "gravity"?
100
This word describes the Earth spinning continuously.
What is "rotating"?
200

Earth’s seasons last approximately 90 days each. What factors influence the duration of the seasons?

a. Earth's angle of tilt and speed of revolution.

b. Earth's angle of tilt and speed of rotation.

Earth's angle of tilt and speed of revolution.

200
The sun is a big fiery ball of gas called this.
What is a "star"?
200
Solar refers to the sun. This term refers to the moon.
What is "lunar"?
200
It takes this long for the Earth to complete on full rotation.
What is 24 hours?
200
This imaginary line goes from the North Pole to the South Pole of the Earth.
What is the "axis"?
300
The Earth takes this long to revolve around the sun.
What is 365 1/4 days?
300

Moons are much smaller than stars, so how can the Moon block the Sun during an eclipse?

The moon is closer to the earth than the sun so it appears large in the sky.

300
During this phase of the moon, we can see no light from the moon.
What is a "new moon"?
300
This object is used to study far away objects in the sky.
What is a "telescope"?
300
This term is used to describe the phase of the moon when we see all of the lit side.
What is "full moon"?
400
When it is winter in North America, it is this in Australia.
What is "summer"?
400
This occurs when the moon moves between the sun and the Earth, blocking some the the sun's light.
What is a "solar eclipse"?
400
During this process, the moon moves through the Earth's shadow, and cannot be seen for a short time.
What is a "lunar eclipse"?
400
The sun appears higher in the sky during this time of year because of the tilt of the earth.
What is "summer"?
400
As we see less and less of the lit part of the moon, we say that it is doing this.
What is "waning"?
500

Some part of the earth experience four distinct seasons, with variation in temperature and day length. Other regions of Earth have very little variation in temperature and day length.  What explains this difference?

Regions with little variation receive direct sunlight all year round.

500

Why does the same side of the Moon always face the Earth? 

A. The Moon’s period of rotation is shorter than its period of revolution. 

B. The Moon rotates once as it completes one revolution around Earth.

 The Moon rotates once as it completes one revolution around Earth.

500
The moon affects this part of the Earth, changing it daily on our beaches.
What is the "ocean tide"?
500
We have this special day every 4 years in February because it takes the Earth 365 and 1/4 days to revolve around the sun.
What is "Leap Year Day"?
500

As the Moon moves in its orbit, more of the lit side becomes visible, starting with a crescent shape. What phase is this?

What is the "Waxing"?