Describing Matter
Anything that has mass or takes up space
What is matter?
The basic particle from which all elements are made
What is an atom?
The amount of space that matter occupies
What is volume?
A measure of how hot or cold something is
What is temperature?
Ice melting
Physical change
The study of matter and how matter changes
What is chemistry?
Name the two types of mixtures we studied
What are heterogeneous and homogeneous mixtures?
A measure of the mass of a material in a given volume
What is density?
A change in which energy is released
What is an exothermic change?
Lighting paper on fire
Chemical change
Characteristic of a substance that can be observed without changing it into another substance
What is a physical property?
Substance made of 2 or more elements that are chemically combined in a set ratio
What is a compound?
Why does oil float on top of water?
It is less dense than water.
The total amount of energy of the motion of all of the particles in an object
What is thermal energy?
Chopping a piece of wood in half
Physical change
A characteristic of a substance that describes its ability to change into different substances
What is a chemical property?
A substance that cannot be broken down into any other substances by chemical or physical means
What is an element?
A system of units by scientists to measure the properties of matter
What is the international system of units?
What is the law of conservation of mass?
The principle that the total amount of matter is neither created nor destroyed during any chemical or physical change
The burning of natural gas on a stove
Chemical change
A single kind of matter that is pure, meaning it is always a specific composition
What is a substance?
The elements in the compound and the ratio of atoms
What is a chemical formula?
The mass of an object is 220g and it is placed in an 5ml cylinder. What is the density of the object?
What is 44 g/ml3?
A change in which one or more substances combine or break apart to form new substances
What is a chemical change?
A ring tarnishing
Chemical change