Chapter 4 Flashcards
What does earth spin on?
Earth spins on its axis
Why do we have daytime and nighttime?
Because the earth rotates on its axis every 24 hours.
how long does it take for the earth to complete one full rotation?
24 hours
How long does it take the earth to orbit the sun?
365 1/4 days
What divides the earth into a Southern and Northern hemisphere?
The equator.
There are four _____ in a year.
Seasons
What do we call the different shapes of the moon?
Moon phases
What causes a lunar eclipse?
The shadow of the earth on the moon
How long does a lunar cycle last?
4 weeks
what time is the sun highest in the sky?
High noon or 12:00
Describe the path the sun takes across the sky
The sun appears to rise in the east and set in the west.
How are the seasons different in June in the Northern and Southern Hemispheres?
In June the Northern Hemisphere is tilted toward the sun and its summer. In June the Southern Hemisphere is tilted away from the sun and its Winter.
About how many lunar cycles occur in 1 year?
13…1 every 28 days. 28 x 13 =365
What do we call the phase of the moon when the moon’s lit side faces away from earth?
A new moon
How does the moon get its light?
From the sun
Why is it warm all through the year near the equator?
Because the equator is closest to the sun
What time of day are the shadows the shortest? Explain?
Shadows are shortest at 12noon because the sun is directly overhead
Why does the position of the sun seem to change?
The position of the sun seems to change Daily as the earth rotates on it’s axis creating day and night. Seasonally the position of the sun seems to change with the seasons depending on earths position in its orbit around the sun
If earth didn’t tilt on its axis, would we have the same kind of seasons?
No. The position of the earth in relation to the sun would be more constant creating milder seasons.
Do we see both sides of the moon from earth?
No, we only see one side of the moon.
If it is summer in South America, is it summer in North America too?
No because North America is in the Northern Hemisphere and South America is primarily in the Southern Hemisphere.
What is different between a full moon and a new moon?
A full moon is when the moon is brightest and appears fully lit. We cannot see a new moon.
Do the North and South poles receive the same amount of direct sunlight every day of the year?
No, the sunlight we receive is different depending on the time of year along with Earth’s position in relation to the sun.
Which area of Earth most likely has the least change in summer and winter temperatures? Give reasons for your answer.
The region of earth around the equator is the warmest on average and has the least change in temperature as seasons change. This is because the equator is always (more or less) Tilted toward the sun.
