earth

• Changes occur in plants in different times of the year in countries with four seasons
• The Philippines has only two seasons: wet and dry
• The earth moves at a constant speed in a counterclockwise direction
• Earth's rotation

  1. Movement of the earth on its axis

  2. The sun appears to rise in the east and set in the west

  3. The earth is the one spinning on its axis

  4. The earth rotates counterclockwise at the north pole and clockwise at the south pole

  5. Causes day and night
• Day

  The period of one complete rotation of the earth, which takes 23 hours 56 minutes and 4.2 seconds
• Earth's revolution

  1. Movement of the earth around the sun

  2. The earth revolves around the sun in a counterclockwise direction

  3. It takes the earth 365 and 1/4 days to revolve around the sun

  4. The earth's orbit is a slightly flattened circle (ellipse)

  5. The earth's farthest point from the sun is called aphelion, and the nearest point is called perihelion

  6. The earth's axis remains fixed in space as it orbits the sun
• The earth's axis is tilted at 23 degrees
• Seasons

  1. During June, July, and August, the northern hemisphere faces the sun while the southern hemisphere is away from the sun

  2. During September, October, and November, both hemispheres receive equal amounts of solar energy

  3. During December, January, and February, the north pole is facing away from the sun, so the northern hemisphere receives the least amount of sunlight while the southern hemisphere receives the greatest amount

  4. During March, April, and May, both hemispheres receive equal amounts of solar energy