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Planet Order

My (Mercury) Very (Venus) Elegant (Earth) Mother (Mars) Just (Jupiter) Sat (Saturn) Upon (Uranus) Needles (Neptune). Planet Order. Solar Energy. Solar Energy: energy from the sun that reaches the Earth as light and heat. Without the sun, there would be no life on Earth.

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Planet Order

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  1. My (Mercury) Very (Venus) Elegant (Earth) Mother (Mars) Just (Jupiter) Sat (Saturn) Upon (Uranus) Needles (Neptune) Planet Order

  2. Solar Energy • Solar Energy:energy from the sun that reaches the Earth as light and heat. • Without the sun, there would be no life on Earth. • There are several factors that affect the amount of solar energy we receive. (3 Main Factors)

  3. #1 Rotation • Rotation:one complete spin of the Earth on its axis. • Each rotation takes 24 hours. • The Earth rotates from west to east, causing the sun to “rise” in the East and “set” in the West. • Why is rotation important? • It allows the entire Earth to receive warm rays during the day, and cool off at night. • Otherwise, one side would be too hot to live on, the other too cold.

  4. #2 Revolution • Revolution:one elliptical orbit of the Earth around the sun. • Each revolution takes 365 ¼ days. • The quarter of a day is added every 4th year, creating a leap year.

  5. #3 Tilt • The Earth is not perpendicular to the Sun. • In fact, it tilts about 23.5°. • This causes the North Pole to point towards the Sun at times, and away at other times.

  6. Angle of the Sun’s rays, solar energy, and location: Direct vertical rays of sunlight concentrate solar energy in smaller area, making more heat. Angled rays spread solar energy out, making less heat. Earth’s tilt makes direct rays most common near equator and less common at high latitudes. Angled Sun Direct rays Angled

  7. The Seasons • The tilt of the Earth as it revolves around the Sun causes the seasons. • In summer, days are longer and warmer. • In winter, days are shorter and cooler. • The tilt also causes opposite seasons in the different hemispheres. • So, when we are in summer, the Southern Hemisphere is in winter.

  8. Winter Summer

  9. Solstice • Solstice:time of the year when the Earth’s poles are at the greatest angle towards or away from the sun. • Solstices occur in the winter (December 21) and summer (June 21).

  10. Equinox • Equinox:occurs twice a year when the poles are not pointed towards the Sun. • During these two days, there is about 12 hours of darkness and light. • Equinoxes occur in the spring (March 21) and the fall (September 22).

  11. The Earth’s Four Spheres The Earth System biosphere—all life forms hydrosphere—Earth’s water atmosphere—gases surrounding earth lithosphere—solid crust of the planet

  12. HIGH LAT MIDDLE LAT LOW LAT LOW LAT MIDDLE LAT HIGH LAT

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