1. Evolution
The biogeochemical cycle for carbon starts with the carbon dioxide (CO2) in the air and bicarbonate (HCO3) in the water. Through photosynthesis and metabolism the carbon atoms from CO2 becomes the carbon atoms of the organic molecules that make up the plant body. The carbon atoms then move into the food webs and become part of the tissues of all organisms in the ecosystem. ... Nitrogen has the unique properties of both carbon and phosphorus. ... In the case of carbon, the rate increases due to the cutting or burning of the forest. ...
STRUCTURE AND BONDING In my essay on the structure and bonding in different substances, I am going to focus on electronic arrangement and their effects on the properties of the substance. METALIC BONDING Metallic bonding occurs between atoms with low electronegativity (.i.e. 1, 2 or 3 valence el...
biology Living things make up the world as we know it. Living things are involved in our life constantly, seeing that we are alive. There are five characteristics that are common to all living things. Living things are made up of one or more cells. Each cell is made up of living matter and is se...
Debating the concept of the atom - the planet's smallest molecular unit - can be traced all the way back to Ancient Greece, when philosophers and scholars that took place around the sixth century B.C. One of the questions that interested these thinkers was the nature of matter. Is matter, they asked...
The fuel consists of pellets of enriched uranium dioxide encased in 12-foot long pencil-thick metal tubes called fuel rods. ... Due to nuclear generated electricity not able to emit carbon dioxide into the atmosphere, nuclear power plants in the U.S. prevent about as much greenhouse has emissions as taking 5 billion cars off our streets and highways. ...
Important Facts the smallest unit of life is the cell instructions for development are contained in DNA collectively, all of the chemical processes in a cell are called metabolism producers often obtain energy from the sun homeostasis refers to the ability to maintain a constant internal environment cells in domains archaea and eubacteria lack nucleii plants are multicellular producers an educated guess might be called a hypothesis science is based on evidence philosophy is not a step in the scientific method an atom is the smallest unit of substance that retains the properties of the subst...