Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Gr 6 SC Ch 6
Gr 6 Science
| Term | Definition |
|---|---|
| chemistry | the study of what substances are made of, and how one substance can be changed into another |
| matter | anything that takes up space and has mass |
| weight | a measure of the pull of gravity upon an object |
| mass | the amount of matter that makes up an object |
| density | the amount of matter (mass) in one unit of volume (space) |
| atoms | the tiny particles that make up matter |
| nucleus | the tiny, extremely dense core of an atom |
| electrons | tiny particles in an atom that circle the nucleus at tremendous speed |
| electron cloud | the shield or cloud formed by fast-moving electrons in an atom that prevents other atoms from moving into the same space |
| neutrons | one of the two kinds of particles that make up the nucleus of an atom; has a neutral charge |
| protons | one of the two kinds of particles that make up the nucleus of an atom; has a positive charge |
| neutral | lacking an electrical charge |
| shell | a set of electrons in an atom that orbit the nucleus at roughly the same distance |
| atomic number | the number of protons in an atom |
| element | a substance that is composed of more than one type of the same kind of atom bonded together |
| compound | a substance that is composed of more than one type of atom bonded together |
| nickel | a very hard metal that is used to make stainless steel, rechargeable batteries, tanks to hold corrosive chemicals, and the five-cent coin |
| chromium | "chrome"; a shiny metal often applied to polished steel to prevent it from rusting |
| lead | the densest of everyday metals; used to make car and truck batteries, wheel weights, and firearms ammunition |
| zinc | a metal often used to coat steel to prevent it from rusting also used in flashlight batteries |
| sulfur | an odorless, yellow solid called brimstone in the Bible; flammable and burns easily |
| carbon | found in two forms, graphite and diamond |
| silicon | a semimetal that is an ingredient in sand, quartz, and glass; in pure form, used to make computer chips |
| phosphorus | a waxlike solid with two forms, white and red |
| hydrogen | a colorless and odorless gas used in chemical factories and as a rocket fuel |
| potassium | a common alkali metal found in the rocks, soils, and oceans of the earth; does not occur naturally in pure form |
| magnesium | a strong but lightweight alkaline earth metal used in parts for airplanes and some cars |
| calcium | the most common alkaline earth metal; an ingredient in calcium carbonate |
| sodium | a common alkali metal that is an ingredient in the table salt and lye; also used in street lights |
| iodine | a solid halogen that sublimes when heated; used in iodized salt and medical antiseptics |
| chlorine | the most widely used halogen; used in bleach, disinfectants, and PVC; an ingredient in table salt |
| bromine | a halogen that is liquid at room temperature; used in photographic film |
| fluorine | a halogen used in toothpaste, coolants, Teflon, and high-powered military lasers |
| helium | a noble gas used in balloons and lasers |
| neon | a noble gas used in signs and lasers |
| argon | a noble gas commonly used a filler in incandescent light bulbs; the most plentiful of the noble gases |
| periodic table of elements | a chart constructed by Dmitri Mendeleev to arrange the elements in such a way as to group similar elements together |
| metals | the elements located to the left and center in the periodic table; most have a lustrous silvery color and are solid at room temperature |
| nonmetals | the elements located at the right side of the periodic table; include many solids and several gases |
| halogens | the elements in the next to last column of the periodic table; highly reactive, showing a tendency to form compounds with alkali and alkaline earth metals |
| sublime | to turn directly from a solid into a gas (such as iodine does when heated) |
| noble gases | the elements in the last column of the periodic table; are gases and do not combine with other elements except under very unusual circumstances |
| molecule | a tiny group of two or more atoms that are bonded tightly together |
| molecular compound | a compound that is composed of individual molecules |
| crystal | a geometric arrangement of atoms |
| ionic compound | a compound composed of charged atoms or groups of atoms |
| chemical reaction | a process in which atoms of elements or compounds are rearranged to form new substances |
| combustion | burning; a chemical reaction in which a substance reacts rapidly with oxygen |
| plutonium | the most abundant of the transuranium minerals |
| osmium | the densest element |
| mercury | the only metal that is a liquid at room temperature |
| bromine | a nonmetal (halogen) that is a liquid at ordinary room temperatures and pressures |
| oxygen and nitrogen | the two main ingredients of "air"; together make up almost 99% of the earth's atmosphere |
| iodine | a halogen that sublimes instead of melts when heated |
| diamond | the hardest of all known substances |
| grams or kilograms | the metric unit that is used to measure an object's mass |
| oxygen | the most abundant element at the surface of the earth |
| neutral atom | electrical state of an atom with an equal number of protons and electrons |
| repel | if opposite charges attract, then like charges do this |
| metals, nonmetals, and semimetals | the three main groups of elements |
Created by:
timberswartz05