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Thoeries Of Evolution

... argued that the patterns of resemblance found in various creatures arose through evolutionary modifications of a common lineage. Naturalists had already established that different animals are adapted to different modes of life and environmental conditions; Lamarck believed that environmental changes evoked in individual animals direct adaptive responses that could be passed on to their offspring as inheritable traits. This generalized hypothesis of evolution by acquired characteristics was not tested scientifically during Lamarck's lifetime ...

Number of words: 1798 | Number of pages: 7

How Mountains Are Formed

... comes up through cracks in the Earth’s crust and explodes out lava and ash. The Hawaiian volcanoes, Mt. Hood, Mt. Etna, Vesuvius, and Mt. Saint Helens are examples of volcanic mountains. Rocks are hard but in time they can bend or fold producing Folded mountains. The Alps formed as the Eurasian plate pushed against the African plate. Other examples of folded mountains are the Rockies, Himalayas, Appalayas, and the Andes. Fault-block mountains are formed when one plate pushes or pulls away from another plate. In the Earth, hot ...

Number of words: 372 | Number of pages: 2

How To Build A Pond

... in the setting, there is usually no rock at the edge of the pond. The way the land is shaped around a natural pond is also usually similar to the surrounding landscape. Sudden changes will look and feel forced. Simple shape pond shapes are best. Sharp curved edges or too many curves look artificial. Choose plants for the pond and its surroundings that make the pond look genuine. Plants at the water's edge are usually different from those found on the surroundings higher ground. Especially reminiscent of natural ponds are large plant's that lea ...

Number of words: 314 | Number of pages: 2

Hurricanes A-level

... intense low pressure and strong winds at the earth’s surface. For their to be enough energy for the hurricane to move, it is essential that there is a considerable source of heat. This is necessary to maintain a consistent supply of rising air in the form of currents. There needs to be a large supply of moisture, as it is necessary for condensation to take place in order to release latent heat and it is the latent heat that initiates the development of the storm and consequently produces heavy rainfall. When the hurricane reaches its ...

Number of words: 882 | Number of pages: 4

Ocean Pollution In The Third World

... Also some of these resources were very vague and some not applicable. The question or problem I will try to give answers, solutions or opinions to is "The contrast between what are we doing to our oceans here in First World countries and in Third World countries." and also "Why?" we are doing this and to try and get a solution for this problem. This is probably one of the biggest questions for this topic because people keep on dumping waste in the water and this is probably the biggest threat to our oceans because of people throw st ...

Number of words: 317 | Number of pages: 2

Acid Rain

... that falls, for that rain is naturally slightly acidic. It is caused by today's industry. When products are manufactured many chemicals are used to create it. However because of the difficulty and cost of properly disposing of these products they are often emitted into the atmosphere with little or no treatment. The term was first considered to be important about 20 years ago when scientists in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time that ...

Number of words: 1940 | Number of pages: 8

Fern Life Cycle

... until next week. When we came in next week we observed our fern spores through the dissecting microscope. We looked to see if we could find anything germinating. We quickly noticed something that appeared like an air bubble squirting out something green. This was our fern spore which was germinating. Next, we removed a few of the germinating spores from the petri dish and put them under a compound microscope scope. We found the spore wall and observed how the developing gametophyte had broken through the wall, as instructed by our lab manual ...

Number of words: 780 | Number of pages: 3

Heroin A Long Dark Path

... both the most abused and the most rapidly growing drug in the opiate family. It is typically sold as a white or brownish powder. There is also a form that is black and sticky known on the streets as “black tar heroin”. Opiates are drugs that are derived from a naturally occurring substance found in the poppy plant. Although the purity of the heroin that reaches the streets is becoming greater, most street heroin is cut or diluted. Usually this is done with another drug, or a substance such as sugar, starch, powdered milk, or quinine. S ...

Number of words: 1871 | Number of pages: 7

Humpback Whales

... FINS Humpbacks come in 4 different color schemes, ranging from white to gray to black to mottled. There are distinctive patches of white on underside of the flukes). These markings are unique to each individual whale, like a fingerprint. The humpback's skin is freqently scarred and may have patches covered with diatoms. Humpback whales have 14-35 throat grooves that run from the chin to the navel. These grooves allow their throat to expand during the huge intake of water during filter feeding. They have small, round bumps on the front o ...

Number of words: 1252 | Number of pages: 5

Chemistry

... most abundant element in the Earth's crust, a thick,blanket of gas enveloping the Earth, providing gases necessary for the support of plants and animals. I am the colorless air that is breathed in constantly. I am the plunging rain tah pours when the sun is shining, the white, damp snow that drifts in children's dreams, and the darting hail that prevents little boys and girls to attend school. I am the vivid part of life. I shield protection for those below me from the sun's intense heat. I am fed and drunk by those who go through hunger. A ...

Number of words: 316 | Number of pages: 2

Investigation Of Reproduction And Development In Animals

... the growth of follicles in the ovary. Follicles produce oestrogen that stimulates the pituitary to produce leutinising hormone (LH). As LH increases the size of the follicle increases until an egg is released. The corpus luteum formed in the follicle secretes progesterone that prepares the lining of the uterus for pregnancy. If fertilisation does not occur the lining of the uterus is discharged from the body in the process called menstruation. What is the birth control pill? The combined oral contraceptive pill (the pill) is a revers ...

Number of words: 721 | Number of pages: 3

Acid Rain

... produces electricity for us. Coal is made of carbon, but the coal that we mine is not pure carbon. It is mixed with other minerals. Two of these are sulfur and nitrogen. Then the coal is burned some of the sulfur changes into sulfur dioxide and nitrogen changes into nitrogen oxide. These escape in to the air as poisonous gases. Some smokestacks release chemicals like mercury, arsenic, and aluminum. Some of these minerals are changed in to gases and others become tiny specks of ash. As these chemicals drift, they may change again. The ...

Number of words: 505 | Number of pages: 2

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