SCIENCE Q4

• Weathering process of breaking rocks into small pieces
• Physical or Mechanical Weathering the rocks are broken but not changed automatically
• Chemical Weathering the minerals in the rocks dissolve or change to other minerals
• Erosion transports bits of rocks and minerals away
• Exfoliation is the expanson of rock caused ny lifting and erosion
• Abrasion is grinding away of rock surfaces
• Wind is sand against exposed rock
• Water rock and pebbles roll and bump or scrape each other
• Gravity the rocks fall on eachother from mountainside
• Oxidation is the chemical reaction where 1 element looses electrons
• Hydroysis water react with minerals
• Basalt Rock is widely used for construction
• Sanddunes are rock particles picked up by the wind
• Deposition can eadily be seen
• Runoff water that doesnt evaporate immediately sink
• Water erosion the water is continuously cycled into the air and back to it’s sources
• Splash Erosion the raindrops falling on the soil exert pressure with their weight
• Sheet Erosion the water flows in broaf sheets across a wide area
• Wind Erosion occur if soil is left unplanted for a long period of time
• Erosion by Gravity bits of rocks are seperated and fall to a lower level brcause of gravity
• Glacial Erosion as the layers of snow pile up the weight of underlying snow increases
• Mass movement is when gravity moves rocks and soil down a slope
• Landslide the whole slope may move slowly downhill
• Glaciers is when the amount og snow is great that it cannot completely melt
• Deforestation cleaning of trees
• Intensive farming farmers use excessive fertilizer and irrigation damages the land
• Housing Development and Road Construction makes soil bare
• Terracing method in farming uses the topography of the land
• Contour Farming is similar to terracing but on a smallar scale
• Tropical Cyclone is a low pressure area that forms in the tropics over the seas and oceans
• Hurricane if the cyclone has sustained 74 mph
• Eye is the center of a typhoon
• Eyewall surrounds the eye
• Depression develops when the rotating wind has a maximum wind speed kf not more than 60km/hr
• Storm is when the winds have a maximum speed from 60 to 118 km/hr
• Typhoon when the maximum wind speed is greater than 118 km/hr
• PAGASA means Philippine Atmospheric Geophysical Astronomical Services Administration
• Radar is another device used in weather forecasting
• Thunderstorm is a storm characterized by strong winds and shortperiod heavy rains
• Tornado is the most violent storm that occurs on earth