subtopic lessons: 10.1; 10.2; 10.3

• It is the imaginary lines that represents longitude
• It is a vertical line that divides the earth into western and eastern hemisphere
• It is the distance measured in degrees north or south of the equator
• the earth title 23.5 on its axis
• where does the earth revolving?

  around the sun
• the most populated continent in the world?

  Asia
• what continent is the coldest on earth?

  Antarctica
• These are the resources that naturally exist without the actions of humankind, and materials extracted from the environmemt
• it uses moving water to supply energy
• it uses water to heated naturally by earth's internal heat
• it uses the heat from the sun to supply energy
• formed from the cooling and solidification of magma

  Igneous rocks
• sediments due to weathering and it occurs in layers

  sedimentary rocks
• originally igneous or sedimentary rocks, undergone chemical change due to heat and pressure

  metamorphic rocks