science

• two movements from the earth: rotation and revelation
• earth is 79% water an 21% land
• the Phillipines is located in the north of the equater and receives vertical rays from the sun
• the axis is a imaginary line
• equater seperates north and east
• the earth rotates in 1 day
• the effects of rotation are: high tide and lowtide, visabillity of the sun, moon and stars, day and night
• when the earth revolves it gives us four seasons
• Aphelion: the fartest on the sun
• Perihelion: the closest to the sun
• seasons of the phillipines: wet and dry
• wet starts at may to october
• dry starts and end at january and may
• two factors that affects the seasons on the phillipines: location, and prevailing of the winds
• the northeast or amihan starts at november to may and is cold and hot
• while, southeast starts at may to october and is warm and humid
• shield volcano has gentle slopes and low viscosity lava
• strato volcano or composite volcano is steep sided, built by layers of lava and ash
• shield volcanoes are found in hawaii
• cinder cone volcanoes are small steep sided and formed by the collapse of a lava dome
• lava domes builds by highly viscous lava accumulating around the vent
• types of volcanoes: active, dormant extinct
• active: recently erupted or expected
• dormant: currently inaactive but may erupt in the future
• extinct nor erupted i history and is unlikely to erupt
• crater: hole of volcano
• composition volcano: alternating lava and cinders
• explosive: able or likely to shatter violently or burst apart
• effusive: relatively gentle outpouring lava
• layers of earth: crust, mantle, middle mantle, outer core, inner core
• crust: made up of basalt and granite rocks known as igneous rocks
• the crust is 3x thicker than the bottom of the underwater
• mantle; second layer of earth is divided into 3 parts
• upper mantle, middle mantle and lower mantle
• upper mantle is rigid rocks
• middle mantle is hot molten rocks
• lower mantle is iron or nickle
• core is the center of the earth
• outer core is a liquid metal that is lava
• inner core is solid and is made of iron and nickel