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Earth, Moon, and Sun

Ch. 15

Learning Target

• S6E2. Obtain, evaluate, and communicate information about the effects of the relative positions of the Earth, Sun, and Moon.

• I can name the difference between rotating and revolving.

• I can determine the current season in a hemisphere based on the position of the Earth and sun.

• I can define a solstice and equinox and name when they occur.

Review

• Earth's axis

• Hemispheres

• Seasons

Rotate

• The spinning motion of a planet on its axis

Earth's rotation

• The Sun and Moon seem to move across the sky each day because Earth is rotating on its axis.

• Earth's rotation causes day and night.

• It takes Earth about 24 hours to rotate once on its axis.

Multiple Choice

What causes day and night?

• Earth's rotation

• Earth's tilted axis

• The moon

Multiple Choice

How long does it take for Earth to rotate once on its axis?

• 8 hours

• 24 hours

• one week

• one month

Revolve

• The movement of an object around another object

The Revolution of Earth

• It takes about one year to complete one revolution around the sun.

• Earth has seasons because its axis is tilted as it revolves around the sun.

Multiple Choice

Which of the following causes seasons?

• Earth's rotation

• Earth's revolution around the sun

Multiple Choice

About how long does it take for Earth to revolve around the sun?

• One day

• One Week

• One month

• One year

Seasons

• In June, the north end of Earth's axis is tilted toward the Sun and it is summer in the Northern Hemisphere and winter in the Southern Hemisphere.

• In December, the north end of Earth's axis is tilted away from the Sun and it is winter in the Northern Hemisphere and summer in the Southern Hemisphere.

Multiple Choice

What season would it be in the Northern Hemisphere?

• Summer

• Winter

• Spring

• Fall

Multiple Choice

What season would it be in the Southern Hemisphere?

• Summer

• Winter

• Spring

• Fall

Solstice

• Happens in June and December

• During the summer solstice, the hemisphere tilted toward the sun will see the longest day of the year.

• During the winter solstice, the hemisphere tilted away from the sun will see the shortest day of the year.

Multiple Choice

What happens during the summer solstice?

• Day and night are an equal length

• It is the longest day of the year.

• It is the longest night of the year.

Multiple Choice

When do the solstices happen?

• March and September

• June and July

• June and December

• January and February

Equinox

• Occurs in March and September

• Halfway between the solstices

• Day and night are each about 12 hours long

• Neither hemisphere is tilted toward or away from the Sun

Multiple Choice

What happens during the equinoxes?

• It is the longest day of the year.

• Day and night are about equal in length

• It is the longest night of the year.

Multiple Choice

When do the equinoxes happen?

• January and February

• June and December

• July and August

• March and September