Sage__

• Conversation - act of protecting earths natural resources for current and future generations.

  • Types of resources
  • Natural resources - resources from nature
  • Man-made resources - from nature but have value to human life
  • 2 types of natural resources
  • Renewable resources - never run out
  • Non renewable resources - can run out
• Atmosphere


  Layer that surrounding the earth
• Composition of the atmosphere


  • Argon
  • Helium
  • Carbon dioxide
  • Water vapor
  • Dust
• Atmosphere


  • Has 5 layers
• Troposphere


  1st layer, 0 km - 16km, weather develops here, temperature -17°C
• Stratosphere


  2nd layer, 16km to 50km, where the ozone layer is found that protects us from ultraviolet radiation, temperature 2.5°C (27.5°F)
• Mesosphere


  3rd layer, 50km to 90km, radiowaves are reflected here, meteors burn up here, temperature -173°C
• Thermosphere


  4th layer, 90km to 300km, aurora occur here, ionosphere is found in the atmosphere/component of thermosphere that makes aurora, temperature 200k/1.72°C
• Exosphere


  Last layer, outermost layer, satellites orbit earth in the atmosphere, temperature -1.500
• • Greenhouse- plant house used by farmers to protect plants from excessive cold or heat and pests
• Greenhouse effect - occurs when particles and gases trap heat and radiate it back to our planet
• Green house gases - heat trapping gases produced by air pollution -carbon dioxide, water vapor, methane, and chloroflourocarbons
• Global warming is the sudden increase in the earths overall temperature
• Sea breeze occur during summer days when the land surface is warmer then the sea surface
• Land breeze occur during night time when the air above the water stays warmer than the air over the land
• Axial tilt determines length of daylight at any point on the earth, the axial tilt of the earth is 23.5 degrees
• June: winter south of the equator, summer north of the equator. The sun is directly on the northern hemisphere and indirectly to the Southern hemisphere

  
• August: spring south of the equator, fall north of the equator. The sun shines equally on southern and northern hemisphere

  
• Axial tilt gave us seasons
• How seasons work

  
• Eclipse is when a planet moves into another planets shadow
• Two types of eclipse:

  Lunar eclipse

  Solar eclipse
• Lunar eclipse is when the three planets (moon, earth and sun is align in a line)
• Two types of lunar eclipse

  Total lunar eclipse

  Partial lunar eclipse
• Total lunar eclipse is when the sun and moon is in the exact opposite side of the earth
• Partial lunar eclipse is when a part of the moon enters Earth's shadow
• Solar eclipse is when the moon moves between sun and earth, blocking the light from sun
• Three main types of solar eclipse

  Total solar eclipse

  Partial solar eclipse

  Annular solar eclipse
• Total solar eclipse is when the earth, moon and sun is in a direct line and the sky became very dark
• Partial solar eclipse is when the moon, sun, and earth is not exactly aligned
• Annular solar eclipse is when the moon is the farthest from earth
• During solar eclipse, the moon casts 2 shadow on earth
• Umbra - this shadow gets smaller when it reaches the earth
• Penumbra - gets bigger as it reaches the earth
• Solar eclipse happen every 18 months and it only lasted minutes compared to lunar eclipse