Lesson 1
Matter
Anything that has mass and takes up space
Element
A substance that cannot be broken down into any other substance by chemical of physical means
Weight
A measure of the force of gravity on you
Physical Change
Alters the form of appearance of matter but does not turn any substance in the matter into a different substance
Chemical Bond
A force of attraction between two atoms
Chemistry
The study of matter and how matter changes
Atom
The basic particle from which all elements are made
Mass
The amount of matter in an object
Chemical Change
A substance transforms into another substance. A change in matter that produces one or more new substances.
Chemical Formula
Shows the elements in the compound and the ratio of atoms
Substance
A single kind of matter that is pure, meaning it always has a specific makeup of composition
Molecule
A group of two or more atoms held together by chemical bonds
Volume
The amount of space that matter occupies is called its volume
Temperature
Measure of how hot or cold something is.
Endothermic Change
A change in which energy is absorbed.
Physical Property
A characteristic of a substance that can be observed without changing it into another substance
Compound
A substance made of two or more elements that are chemically combined in a set ratio
Density
A measure of the mass of a material in a given volume
Thermal Energy
The total energy of the motion of all of the particles in the sky
Exothermic Change
A change that releases energy
Chemical Property
A characteristic of a substance that describes its ability to change into different substances.
Mixture
Made of two or more substances are together, but their atoms are not chemically bonded
International System of Units
A way scientists measure properties in matter
Law of Conservation of Mass
A substance transforms into another substance. A change in matter that produces one or more new substances.
Chemical energy
The energy stored in the chemical bonds between atoms is a form of energy.