EARTH-SUN RELATIONS PRACTICE

earth-sun diagram

(The four positions of the earth represent the equinoxes and the solstices.)

Draw the following on EACH of the diagrams and label them with the number.

1. Equator
2. Tropic of Capricorn
3. Tropic of Cancer
4. Arctic Circle
5. Antarctic Circle

Identify by the proper letter or letters.

Equinoxes_______________
Solstices___________
March 21_______________
June 21________________
September 23___________
December 22____________
perihelion_____________
aphelion_______________
direction of earth's rotation______________
direction of revolution_____________________

Put and label on B and C the EXACT POINT (a dot) of the perpendicular rays of the sun with the number 7.

Put and label on each the EXACT POINT (a dot) of the northernmost and southernmost tangent rays with the number 3.

Carefully draw the circle of illumination and label it number 6 on each earth. Lightly shade in the areas shown on each earth which are not illuminated.

Answer the following questions by filling in the blank with the answer or the correct letter.

The date is March 21. At noon the direct rays of the sun are shining on the _______________ which has a latitude of _______________ . _______________ degrees from the direct rays are the _______________ rays which together form the _______________. The northernmost ray is then located at the latitude _______________N which is called the _______________ and the southernmost ray is at _______________S which is the _______________. The date is known as one of the _______________. The other one is on _______________.

The date is June 21. At noon, the direct rays of the sun are shining on the _______________ which has a latitude of _______________. In Indiana, the season which is beginning is _______________. _______________ degrees from the direct rays are the _______________ rays, which are known as the _______________ at a point A--on the near side of the pole, B--on the far side of the pole _______________. The southernmost tangent ray is located A--on the near side of the pole, B--on the far side of the pole) _______________ and at the latitude _______________ which is known as the _______________. This date is known as one of the _______________. The other one is on _______________.

The date is September 23. The direct rays of the sun are shining on the _______________ which has a latitude of _______________. The position of the sun's rays are identical to those on the date of _______________. This date is known as the other _______________.

The date is December 22. At noon the direct rays of the sun are shining on the_______________ which has a latitude of _______________. In Indiana, the season which is beginning is _______________. The northernmost tangent ray is located at latitude _______________, known as the _______________ (A--on the near side of the north pole, B--on the far side of the north pole) _______________. The southernmost tangent ray is at the latitude _______________, known as the _______________ (A--on the near side of the south pole, B--on the far side of the south pole) _______________. This date is known as one of the _______________.

The date is January 3. At noon the direct rays of the sun would best be described as hitting the earth (A--at the equator, B--at the Tropic of Cancer, C--at the Tropic of Capricorn, D--at the pole, E--at either the Arctic or Antarctic Circle, F--between 23S and the equator, G between 23N and the equator, H--at none of these) _______________. The southernmost tangent ray would be located (A--on the far side of the south pole, B--on the near side of the south pole, C--at the south pole) _______________. This date is known as the _______________ which means the earth and the sun reach the point at which they are _______________. The opposite position is called the _______________ and occurs on the date of _______________. The north pole experiences daylight starting on the date of _______________. The south pole experiences daylight starting on the date of _______________.

How many times during the year would the sun's direct rays (90 angle with the surface of the earth be received at the following locations?

Tropic of Cancer_______________ 21N_______________
18S_______________ 25S_______________
North Pole_______________ 66N_______________
47S_______________ Paris, France (48 52'N, 2 20'E)_______________
Antarctic Circle_______________ New Orleans, LA (30N, 90W)_______________
0 latitude_______________ Jacksonville, AL, USA (33 52'N, 85 45'W)_______________

Go to the ANSWERS to Earth-Sun Relations Practice

Go to the Earth-Sun Relations Demonstration

See a diagram of the solar rays to earth.
Illustration of the Migration of the Direct Rays
Earth-Sun Relations Review Exercise
For more practice with earth-sun relations, see this exercise on revolution.
An analemma