Describing Matter
What is Matter?
anything that takes up space and has mass
What is an Element?
a substance that cannot be broken down into any other substances by chemical or physical means
What is a chemical Formula?
a representation of the elements in a compound
What is weight?
a measure of the force of gravity on an object
What is a physical change?
a change that alters the form or appearance of matter but does not turn any substance in the matter into a different substance
Formula for density?
Densisity= MASS/volume
What is an Atom?
basic unit from which all matter is made up.
What is an Atom?
the basic particle from which all elements are made
What is a mixture?
two or more substances that are together in the same place, but their atoms are not chemically bonded
What is Mass?
The amount of matter or particles in an object
What is a chemical change?
a change in which a single substance breaks down into two or more substances. It breaks down and and cannot be put back together.
an object has a mass of 284g and a volume of 14.7 cm
what is the density?
19.3 g
What is a substance?
a single kind of matter that is pure, meaning it always has a specific makeup, or composition?
What is a chemical bond?
a force of attraction between two atoms
What is a heterogeneous mixture?
a mixture in which you can usually see the different parts and they can easily be separated out
If oil has the density of .91 g and corn syrup is 1.33 and honey 1.35 water has 1.00 please put in order of heaviest to lightest.
honey, corn syrup, water, oil
What is examples of chemical Change?
combustion, electrolysis, oxidation (rusting), tarnishing
mass 67.2 and a density 2.8 g what is the volume?
24 cm
What is a physical property?
a characteristic of a substance that can be observed without changing into another substance
What is a Molecule?
a group of two or more atoms held together by chemical bonds
What is a homogeneous mixture?
a mixture in which the substances are so evenly mixed that you can't see the different parts and they are difficult to separate
how does mass compare to weight?
Weight is based on gravitation, mass is how large a object is.
volume of an object is 240 ml and the density is .75 g what is the mass?
180 mass
What is a chemical property?
a characteristic of a substance that describes its ability t change into different substances
What is a Compound?
a substance made of two or more elements that are chemically combined in a set ratio
what to types of chemical bonds are there?
Compounds and molecules
What is density?
a measure of the mass of a material in a given volume that can be expressed as g/cm cubed
Why is Mass a better unit for measuring matter than weight?
Weight is affected by gravity which varies. mass is a measure of how much matter an object has.
how do you know that water in the solid state is less dense than water in a liquid state?
Water because ice has oxygen in-between.