SEM unit 2 Flashcards
(15 cards)
What fraction of the Earth is the moon?
1/4
Earth’s revolution around the sun takes what?
365 and ¼ days
Why do the sun and moon appear to be the same size in the sky?
The sun is 400 times bigger than the moon but it is also 400 times farther away.
Compared to winter, shadows in the summer are generally what?
shorter
Shadows move from what to what?
West to east
What causes Earth to go to Winter?
The Earth tilting away from the Sun
What season and time of day do we have the shortest shadows?
Summer at noon (12 PM)
True or false: If the Sun is closer to the Earth we are in summer.
False, we are actually close to the sun in winter. Distance does not affect the seasons, the tilt does
When the Southern Hemisphere is having summer the Northern Hemisphere is having what?
winter
Why does the sun appear to rise and set?
The sun does not really move. The Earth rotates on its axis which creates day and night.
Explain what causes seasons.
The Earth’s revolution and tilt to the Sun
Approximately how long does it take the moon to revolve around the Earth?
27.3 days or approximately one month
What times of day are shadows longest?
Morning and afternoon
Why do we have a leap year?
Every year is 365 1/4 days, therefore every 4 years the 1/4 adds up to a day
The sun appears lower in the sky in what season?
Winter
