scieence looooms upon us all, pwahaha. =)
So i'm gonna make up a list of stufffizzzle to help you guys even though noone's probably gonnna read this. HAha, i'm gonnna learrn by typing all this up
Ohhh, and elbow buddy, i lost my nootes that you so awesomely wrote upp. And then i lost my geography notes.. Is there something wrong with me? I keep on losing things, and forgetting things, and doing the stupidest, clumsiest thingsss.
haha, betyou know who this is noww.!

Acids: A substance that releases hydrogen ions when added to water.
pH less than 7.
strong- hydrocloric acid, sulphuric acids. weak- citric acid, ethanoic acid.
Turns litmus paper blue, gives carbon dioxide when added to carbonates
neutralizes alkali
Alkali: A base that is soluble in water. Usually metal hydroxides, eg, sodium hydroxide, ammonia solution.
Turn litmus red, neutralize acids, pH over 7, react with acids to produce a salt and water.
Atom: Smallest particle of an element that can exist. Made of subatomic particles, protons, neutrons and electrons. Atomic number is defined by the number of protons in the nucleus.
Base: Substnace that reacts with acid to form a salt and water. Usually metal oxides or hydroxides, and usually compounds of alkali and alkali earth metals.
Brain: A large mass of nerve cells in animals whose function is to cooridinate the processes of the body. Within the brain, there are millions of nerve cells which continuousllu receive and send out nerve impuses. It is able to interpret these electrical impulses in such a way that environmental stimuli like light and sound, causes response and adaptation to the situation.
Also coordinates all body activity to ensure efficint operation. Stores information.
combustionL Substances undergo a chemical reaction with oxygen, heat and light are usually produced and oxidation takes place.
Compound: pure substance made of atoms of 2 or more elements chemically bonded. May be held together by ionic or covalent bonds.
Conservation of energy: Energy cannot be created or destroyed.
Corrosion: Eroding of a substance by chemical reactions with other substances. Eg rust or weathering of limestone buldings by acid rain.
Covalent bonds: Formed when 2 atoms come together and share electrons. Usually found in compounds which contain only nonmettalic bonds, eg CO2, and elements which exist as diatomic atoms, H2, N2. Covalent compounds tend to be nonconductor and have low melting and boiling points.
Decomposition: Breaking up of a compound into other compounds and elements.
AB + energy --> A + B
earthquake: A shaking due to energy released by a sudden fracturing of earth. Three types of waves , P S and L waves. Place within where eq starts is the focus. Point on the earth's surface directly above the focus is the epicentre. Magnitude is the amount of energy released.
P is the primary wave, S is the secondary, L is the long waves.
Electrolysis: The result when an electric current is passed through a liquid containing ions and chemical charges. It is used to extract metals and nonmetals from their compounds.
Endocrine glands: Release chemicals called hormoes directly into the bloodstream. Major endocrine glands are the pituary, thyroid, pancreas, ovaries, testes, and adrenal.
Endothermic reactions: Raction where heat energy is taken in from surroundings to make the reaction occur. Eg thermal decomposition
excretion: process which organisms get rid of waste products of metabolism. Main excretory products are water, CO2, and urea.
exothermic reactions: Where heat energy is released from the reactans to the surroundings. Products more stable than the reactants, examples are combustion and neutralization.
Homeostasis: Maintenance of a constant condition within an organism. Controls blood glucose level by insulins, control odf blood water content, and body temperature by skin.