Grade 11 Earth Science First Midsemester Exam PDF

Grade 11 Earth Science First Midsemester exam Made by Ari Del Rosario rate of replenishment ➔ net reduction of intergranular space, decreases the volume of...

Grade 11 Earth Science First Midsemester exam Made by Ari Del Rosario rate of replenishment ➔ net reduction of intergranular space, decreases the volume of the rock/sediment ➔ results in SUBSIDIENCE (lowering of ground level)  ◆ greater chance of flooding ◆ IRREVERSIBLE Groundwater pollution Saltwater Intrusion ➔ there’s a natural filtration process ➔ near coastline/shore (through soil, rock, and sediment) ➔ natural boundary between fresh but some compounds & ions are too groundwater and saline seawater small or are easily dissolved (less dense freshwater rises, denser salt water sinks) ➔ groundwater extraction lowers the water table, when it reaches the boundary, the saltwater and freshwater will mix → UNDRINKABLE Energy Resources NON-RENEWABLE FOSSIL FUELS NUCLEAR ENERGY ➔ the energy that is produced by ➔ produced from the burial and nuclear power plants is renewable, diagenesis of the remains of ancient but the fuel that is required is not organisms renewable ➔ COAL ➔ nuclear reactions release ◆ in swamps, dead plants → tremendous amounts of heat that coal are used to turn water to steam to ➔ PETROLIUM/OIL run turbines ◆ energy from hydrocrabon ◆ nuclear fission (split the  ◆ 180 oil rigs in the Red Sea atom by having a neutron alone (Chevron/Shell) collide with the uranium ◆ top oil reserves in Venezuela atom) → La Luna Formation ◆ nuclear fusion (combine ➔ NATURAL GAS atoms) ◆ in the ocean, dead plants & ◆ nuclear decay (nucleus is animals → oil and gas unstable and emits radiation) deposits ➔ commonly uses uranium ➔ safety and environmental concerns ◆ waste disposal ◆ exposure effects RENEWABLE GEOTHERMAL POWER HYDROELECTRIC POWER ➔ uses heat from deep below the Earth ➔ energy is produced from moving to produce steam from water water ➔ the steam will drive the motion of ➔ the movement of water involves the electricity-producing turbines transformation of potential energy ➔ conditions for a feasible geothermal into kinetic energy power source ➔ connect it to turbines → make ◆ Adequate supply of water electricity ◆ Supply of water must be ◆ e.g. Niagra Falls continuously recharged ◆ Niagra Falls makes 4.9 million ◆ Water must be stored in a kilowatts of electricity, 3.8 permeable host rock million homes ◆ Presence of a large structure or magmatic body that can enable the continuous heating of water for several decades ◆ A strong cap rock must be above the water supply and heat source where the plant can be built ➔ ex. steam geysers in New Zealand SOLAR POWER OTHERS ➔ photoelectric effect ➔ WIND TURBINES ➔ photons → metal → electrons ➔ BIOFUEL ◆ organic waste → fuel ➔ TIDAL ENERGY ➔ WAVE ENERGY ➔ OCEAN CURRENT ENERGY ➔ HYDROGEN FISSION