Question | Answer |
Safety Goggles | Goggles that protect one's eyes from harmful substances and must be worn at all times in a lab. |
Triple Beam Balance | A scale tool used to approximate the amount of matter contained within a substance. |
Graduated Cylinder | A container that is used to measure the volume of liquids and irregular solids using milliliters. |
Volume | The amount of space that an object takes up. |
Density | The amount of matter within a given volume. |
Test Tube | A container used to hold small amounts of liquid. |
Chemical Property | A property of an object that refers to the ability to undergo a chemical change - e.g. flammability. |
Physical Property | A property of an object that can be observed without changing the chemical composition of the object - e.g. size. |
Chemical Change | A chemical reaction that alters the chemical composition of an object - e.g. combustion of charcoal. |
Physical Change | A change that does not alter the chemical composition of an object - e.g. slicing bread. |
Atom | A small unit of matter that consists of electron(s), proton(s), neutron(s), and a nucleus - e.g. a gold atom. |
Electron | A subatomic particle that revolves around the nucleus in a vast area known as the electron cloud and has a negative charge and is much smaller than a proton or neutron - varying numbers creates ions - e.g. cation and anion. |
Proton | A subatomic particle that resides in an atom's nucleus, has a positive charge, and contributes to the atom's mass AND atomic number - varying numbers creates different elements. |
Neutron | A subatomic particle that resides in an atom's nucleus, has no charge, and contributes to the atom's mass. - varying numbers create isotopes of elements. |
Period | A row on the periodic table and all elements in an identical row share the same number of electron shells. |
Group | A column on the periodic table and all elements in an identical column share the same number of valence electrons, thus similar properties. |
Metal | An element that is malleable, ductile, lustrous, and can conduct heat and electricity. Metals are located to the left of the periodic table - e.g. silver. |
Nonmetal | An element that is not malleable, not ductile, not lustrous, and cannot conduct heat and electricity. Nonmetals are located to the right of the periodic table - e.g. hydrogen. |
Metalloid | An element that holds characteristics of both metals and nonmetals - e.g. boron. |
Molecule | Matter that is formed with two or more atoms chemically bonded. |
Element Molecule | A molecule that consists of atoms of one element - e.g. Ozone (03). |
Compound Molecule | A molecule that consists of atoms of more than one element - e.g. Water (H20). |
Chemical Equation | A way of describing a chemical reaction - e.g. H2+O -> H2O. |
Force | A push or pull. Unbalanced forces occur when the forces at hand are not at equilibrium so motion results. Balanced forces occur when the forces at hand are at equilibrium so no motion results. |
Friction | A force that moves an object in an inverse direction from the direction of the initial force along a surface. - e.g. a piece of wood scrapes across the tile floor and is pushed in the opposite direction. |
Thrust | A strong push that moves an object. |
Newton's First Law of Motion | An object at rest will stay at rest, and an object in motion will stay in motion until acted on by an unbalanced force - e.g. a car is pushed with a net force of 1000000000N and the car is not at rest anymore. |
Newton's Second Law of Motion | The acceleration of an object is dependent upon the mass of the object and the force applied to the object - i.e. F=MA. |
Newton's Third Law of Motion | For every action there is an equal and opposite reaction - e.g. a rocket launches and pushes exhaust down and the ground pushes the rocket up. |
Acceleration | A change in velocity. |
Galaxy | A massive body of stars, dust, gas, and other stellar remnants that is held together by gravity - e.g. the Milky Way. |
Asteroid | A large rock that orbits a larger body - e.g. asteroids in the Asteroid Belt between Mars and Jupiter. |
HR Diagram | A diagram that relates a star's temperature and a star's luminosity. |
Main Sequence Stars | Stars found on the HR diagram that are more orthodox and their luminosity increases with their temperature - e.g. the Sun. |
Light Year | The distance that light travels in the time it takes for Earth to complete one revolution of the Sun. |
EM Spectrum | The arrangement of the various types of electromagnetic radiation that vary by frequencies. Many EM waves are found in space. |