what is matter?
anything that occupies space and has weight
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| Term | Definition |
|---|---|
| what is matter? | anything that occupies space and has weight |
| what is element? | matter composed of atoms with the same number of postive changes in their nucli |
| what is atom | smallest unit of an element |
| what are 4 body elements that make up 96 % of body weight | oxygen, carbon, hydrogen,nitrogen |
| what are the three parts of an atom? | protons, neutrons, and electrons |
| what is the charge of a proton? | positive |
| charge of electron? | negative |
| charge of a neutron | neutral |
| what type of bond involves a electronic transfer? | ionic bond |
| what type of bond involves sharing electrons? | covalent bond |
| weak bond responsible for water properties | hydrogen bond |
| what is an ion? | an atom with a charge due to a gain or loss of electrons |
| what is a cation | positive ion (lost electrons) |
| what is an anion | negative ion (gained electrons) |
| what is an electrolyte | substance that forms ions in water and conducts electricity |
| name one function of water in the body | temp regulation,solvant, lube, transport, chemical reactions |
| what is a molecule | two or more atoms bonded together |
| what is a compound | two or more differnt elements bonded together |
| what is a catalyst | speeds up reactions without being used up |
| what are enzymes | biological catalyst (proteins) |
| what is ph? | measure of hydrogen ion concentration |
| what is the ph scale range? | 0-14 |
| acid | realses hydrogen ions |
| base def | accepts H+ or releases H- |
| what molecule transfers energy in cells | ATP |
| what does atp stand for | adenosine triphosphate |
| list the 6 forms of energy | chemical, electrical, machinal, radiant, thermal, nuclear, |
| what is a solution | homogeneous mixture (solute solvent) |
| what is a suspension? | large particles that settle out |
| what is a colloid | particles that do not settle out (plasma) |
| what is a precipate | solid formed from during a solution during a reaction |