Chapter 23- Astronomy

Question 1

Describe the shape of Earth.

Answer 1

Not perfectly spherical; equator bulges and poles are flatter

Question 2

What causes the shape of the Earth?

Answer 2

Spinning of Earth

Question 3

What direction does Earth rotate

Answer 3

Counterclockwise

Question 4

How long is 1 rotation of Earth

Answer 4

24 hours

Question 5

How does the counterclockwise rotation of Earth affect how we see the Sun?

Answer 5

Cause it to rise in the east and set in the west

Question 6

What shape does Earth revolve in?

Answer 6

An elliptical orbit

Question 7

When is the Earth closest to the Sun

Answer 7

Winter

Question 8

How long does it take to complete 1 revolution?

Answer 8

365.25 days

Question 9

Why and when do we have a leap year

Answer 9

It happens every 4 years to put revolution back on track

Question 10

What is aphelion

Answer 10

When the Earth is furthest away from the sun in its orbit; occurs around July 4

Question 11

What is perihelion

Answer 11

When the Earth is closest to the Sun in its orbit; occurs around January 4

Question 12

Why do we have seasons

Answer 12

The curvature of the Earth causes the sun rays to strike at different angles

Question 13

What is the reason for the seasons

Answer 13

The tilt of the Earth

Question 14

What degree is Earth currently tilted at

Answer 14

23.5 degrees

Question 15

What equinox happens in spring and what day is it around

Answer 15

Vernal; March 21

Question 16

What equinox happens in fall and what day is it around

Answer 16

Autumnal; September 22

Question 17

What happens on an equinox

Answer 17

The sun strikes directly on the equator and all of Earth receives 12 hours day and 12 hours night

Question 18

What does solstice mean

Answer 18

Sun stop

Question 19

Where do the sun rays strike during the summer solstice

Answer 19

23.5 degrees North (Tropic of Cancer)

Question 20

What hemisphere is tilted towards the Sun during the summer solstice

Answer 20

Northern

Question 21

When does the summer solstice happen

Answer 21

June 21

Question 22

During the summer solstice which hemispheres have which seasons

Answer 22

Northern- summer

Southern- winter

Question 23

During the winter solstice where do the sun rays strike

Answer 23

23.5 degrees south (Tropic of Capricorn)

Question 24

Where are the hemispheres in relation to the sun in the winter solstice

Answer 24

Northern- away

Southern- towards

Question 25

When does the winter solstice occur

Answer 25

December 21