This simple cartoon shows general similarities and differences between eukaryote and prokaryote cells.
Image courtesy of Windows to the Universe
Biology
Biology is the study of
life and living organisms. Biologists study the
structure of organisms, how they grow, their
evolution and function in the environment, and their distribution and
relation to other species. Biologists study life at a wide range of scales, from the microscopic, cellular level to the scale of organisms and
ecosystems.
Because all substances are made of chemicals, a biologist must understand chemistry to be able to understand life. Similarly, because life in the Earth system - the biosphere - interacts with the other parts of the Earth system (such as the atmosphere, hydrosphere, and geosphere), many geologists must understand biology. Biogeochemists specialize in the study of the interactions between life and the Earth system.
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Science, Evolution, and Creationism", by the National Academies, provides fascinating background on these topics for all, and is particularly useful for the Earth and space science classroom. Check our other
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This Windows to the Universe Exploratour examines the scientific evidence of biological evolution. Take the tour to travel through 10 web pages about the scientific theory that explains how and why living
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Biomes are large regions of the world with similar plants, animals, and other living things that are adapted to the climate and other conditions. Explore the links below to learn more about different biomes.
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Chemistry is the study of matter, energy, and their interactions. Chemists study the composition of substances, their properties, and how they react with each other under varying circumstances. Indeed,
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The first time people got a glimpse of the whole Earth was December 1968. Apollo 8 astronauts took pictures of the Earth as they traveled to and from the Moon. In their photographs, the Earth looks like
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Jupiter's atmospheric environment is one of strong gravity, high pressure, strong winds, from 225 miles per hour to 1000 miles per hour, and cold temperatures of -270 degrees to +32 degrees (freezing temperature).
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In July, 1996, it was announced that Dr. David McKay, along with a team of scientists at Johnson Space Center (a division of NASA), had discovered possible fossils of bacteria in a meteorite named ALH84
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Saturn's atmospheric environment is one of strong gravity, high pressure, strong winds, from 225 miles per hour to 1000 miles per hour, and cold temperatures of -270 degrees to +80 degrees. With winds
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