Seasons/Celestial Objects

arc

the sun appears to move across the sky in an *****

earths rotation and tilt

why does the sun appear to move across the sky in an arc?

15*/hr

the sun appears to move at a rate of *****

earth rotates west to east

why does the sun appear to rise in the east and set west?

south

In the northern hemisphere the sun's path will lean to the *****

north

in the southern hemisphere the sun's path will lean to the *****

solar noon

highest altitude achieved by the sun each day

zenith

90* above the observer/direct rays/perpendicular

never

the sun ***** reaches the zenith

northern hemisphere

Polaris is only seen from the *****

north

Polaris is always drawn to the ***** side of the celestial sphere diagram

south

Solar noon position of the Sun in the northern hemisphere is always *****

north

the shadow at solar noon will always fall to the *****

longer

the lower the altitude of the Sun, the ***** the shadow

June 21

what is the date of the shortest shadow?

December 21

What is the date of the longest shadow?

opposite

shadows always fall in the ***** direction of the Sun

angle of insolation

the angle at which the Sun's rays are received on Earth

shorter

the higher the angle of insolation the ***** the length of a shadow

greater

the greater the angle of insolation, the ***** the intensity

incoming solar radiation

IN SOL ATION

increase

when the angle that energy from the Sun is increased and becomes more direct, the absorption and heating will *****

east to west

all celestial objects appear to move from ***** across the sky

earths tilt and revolution

the seasons are caused by...

Parallelism

the fact that the Earth's tilt stays parallel to its last position as it orbits the Sun

Solstices

when the Sun reaches either a maximum or minimum altitude in the sky for a location for the year

noon meridian

meridian the Sun is on at noon

day and night, apparent motion of the Sun, apparent motion of the stars

Name 3 effects of Earth's rotation

ecliptic

The Sun's path in the sky is called the *****

apparent motion of the stars

the path of the stars appears different when looking at different parts of the sky

north

Which direction is the camera facing?

east

Which direction is the camera facing?

south

Which direction is the camera facing?

west

Which direction is the camera facing?

circumpolar stars

stars that never rise or set, always above the horizon

360*/ 365 days

rate of earth's revolution around the Sun

yearly cycle of constellations, position of Big Dipper changes in a yearly cycle, seasons

Name 3 effects of Earth's revolution

January 3, closest to Sun, moves fastest, greater KE, lower PE, stronger gravitational attraction, greater apparent diameter

Describe Perihelion (date, position, speed, KE, PE, gravitational attraction, apparent diameter)

July 4, farthest from Sun, moves slowest, lower KE, greater PE, weaker gravitational attraction, smaller apparent diameter

Describe Aphelion (date, position, speed, KE, PE, gravitational attraction, apparent diameter)

June 21

What date does the South pole have 0 hrs of daylight?

December 21

What date does the North Pole have 0 hrs of daylight?

due east, due west

On the equinoxes the sun rises **** and sets ****