Wednesday, May 20, 2009
Wednes-Day 2
AP Chem- reviewed some of the 2009 AP Chem Part II's.
Bring in a glass bottle for the silver mirror reaction tomorrow.
Bio - For the unit objectives hw, you do NOT have to do obectives 24,27,30 and 35 through 37. Any "recognize" objective just has to be COPIED verbatim.
We discussed some of the ways that humans impact the environment:by over-hunting and over-fishing, humans have caused the extinction of various species: the dodo-bird, the QUAGGA, one of Africa's most famous extinct animals, was a subspecies of the plains zebra, which was once found in great numbers in South Africa's Cape Province and the southern part of the Orange Free State. It was distinguished from other zebras by having the usual vivid marks on the front part of the body only. The Tasmanian Tiger was hunted to extinction in 1936. The sea cow grew up to 7.9 meters (25.9 ft) long and weighed up to three tons, much larger than the manatee but is now extinct.By burning fossil fuels, carbon dioxide concentration in the atmosphere increases and can contribute to the greenhouse effect. Also oxides of sulfur and nitrogen, from burning coal and other fuels, can react with water in the air to form acids, which produce acid rain that changes the abiotic factor, pH, of aquatic biomes. This can upset a stable ecosystem.We discussed various ways that humans can negatively impact ecosystems. From deforestation, which reduces the producer/autotroph level of organisms and can cause ecosystem instability, to monoculture farming, the planting of a single type of crop that can deplete the nutrient-rich layer of topsoil of the same essential nutrients so that the soil becomes less and less fertile for plants, we gave several examples of some of the negative effects that humans can and do cause.
We discussed some of the positive impacts that human societies have tried to produce on various ecosystems via laws and intelligent ecological practices.
Bring in a glass bottle for the silver mirror reaction tomorrow.
Bio - For the unit objectives hw, you do NOT have to do obectives 24,27,30 and 35 through 37. Any "recognize" objective just has to be COPIED verbatim.
We discussed some of the ways that humans impact the environment:by over-hunting and over-fishing, humans have caused the extinction of various species: the dodo-bird, the QUAGGA, one of Africa's most famous extinct animals, was a subspecies of the plains zebra, which was once found in great numbers in South Africa's Cape Province and the southern part of the Orange Free State. It was distinguished from other zebras by having the usual vivid marks on the front part of the body only. The Tasmanian Tiger was hunted to extinction in 1936. The sea cow grew up to 7.9 meters (25.9 ft) long and weighed up to three tons, much larger than the manatee but is now extinct.By burning fossil fuels, carbon dioxide concentration in the atmosphere increases and can contribute to the greenhouse effect. Also oxides of sulfur and nitrogen, from burning coal and other fuels, can react with water in the air to form acids, which produce acid rain that changes the abiotic factor, pH, of aquatic biomes. This can upset a stable ecosystem.We discussed various ways that humans can negatively impact ecosystems. From deforestation, which reduces the producer/autotroph level of organisms and can cause ecosystem instability, to monoculture farming, the planting of a single type of crop that can deplete the nutrient-rich layer of topsoil of the same essential nutrients so that the soil becomes less and less fertile for plants, we gave several examples of some of the negative effects that humans can and do cause.
We discussed some of the positive impacts that human societies have tried to produce on various ecosystems via laws and intelligent ecological practices.
# posted by C @ 1:32 PM 
