Astronomy

What is the relationship between the length and angle of shadows to the apparent position of the Sun in the sky? (Continued)

(Answer Directly From Science Presentation) In the summer since the position of the Sun appears to be almost directly overhead at noon, the shadows will be shorter. In the winter since the position of the Sun appears not to be as high in the sky at noon, the shadows will be longer.

What is the longest day of sunlight for the Southern Hemisphere?

December 21st

What is the shortest day of sunlight for the Northern Hemisphere?

December 21st

Why does Earth have seasons?

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

Rotation

Earth spinning on its axis.

What season is the northern hemisphere in? ~~See photo by opening URL in other tab: http://www.crh.noaa.gov/images/gid/equinox.gif

Either Spring or Fall.

Why it would be warmer in the summer?

It is a smaller area to heat, so the temperature would increase faster. During the summer the sun strikes the northern hemisphere more directly and for longer periods of time than in the winter. This causes the northern hemisphere to become warmer.

What is the longest day of sunlight for the Northern Hemisphere?

June 21st

What is the shortest day of sunlight for the Southern Hemisphere?

June 21st

Does the tilt change from the position of the Earth at the aphelion to the position of the Earth at the perihelion?

NO~It stays at 23.25 Degrees

Winter Solstice (for Northern Hemisphere)

Occurs on December 21st and give the less direct amount of sunlight to the Northern Hemisphere. Considered to be the "shortest day of the year".

Summer Solstice (for Northern Hemisphere)

Occurs on June 21st and gives the most direct sunlight to the Northern Hemisphere. Considered to be the "shortest day of the year".

Where does the axis located in the Northern Hemisphere point to?

Polaris-The North Star

Compare the angle of the position sun in the summer to the angle of the position of the sun in the winter

The angle is steeper in the summer and more shallow in the winter

Compare the size of the shadow in the summer and in the winter. (The shadow represents the area that the "sunbeam" strikes on Earth.)

The area the sunbeam strikes in the summer is smaller.

Equinoxes

The equinox happens twice a year. The spring equinox occurs about on March 21st and the autumnal equinox occurs on about September 21st. Due to the Earth's tilt and location in its orbit, the northern hemisphere and the southern hemisphere each receive 12 hours of sunlight and 12 hours of darkness.

Why is the Northern Hemisphere colder in December than in June and the reverse true in the Southern Hemisphere? -----Understand concepts-- KEY INFORMATION

The northern hemisphere receives less sunlight during the winter because of the tilt of the Earth and its location in its orbit around the sun. The sun appears to rise in the southeast and set in the southwest. The sun also appears lower in the sky at midday. As a result, the norther hemisphere has less hours of direct sunlight in the summer. Less sunlight means less of the sun's rays will strike that area which means that the temperature of the northern hemisphere will be colder (less warm).

What is the relationship between the length and angle of shadows to the apparent position of the Sun in the sky?

The relationship between the length and angle of shadows to the apparent position of the Sun in the sky depends on what season it is. For example, if it was summertime, the sun would be positioned high in the sky. If it was wintertime, the sun would be low in the sky. (Shadows would be shorter in the summertime and longer in the wintertime).

Revolution

When one object moves around another object.

What season is the Southern Hemisphere in? ~~~~~Open URL in other tab: https://www.nc-climate.ncsu.edu/secc_edu/images/Latitude3.jpg

Wintertime/Winter