States of Matter
This state of matter has a definite shape and a definite volume because its particles are tightly packed
What is a solid?
The smallest unit of a substance that still has the properties of that substance
What is an atom?
This ancient Greek philosopher believed matter was made up of tiny, indivisible particles called “atomos.”
Who is Democritus?
The acronym FARTS stands for these descriptions of a chemical change
What is fizz, aroma, radiance, temp change, (new) substance
Ice melting into water is an example of this type of change.
What is a physical change?
This state of matter has particles that move freely and spread out to fill any container.
What is a gas?
Two or more atoms joining together to form a larger particle
What is a molecule?
This scientist proposed that all matter is made of atoms that combine in whole-number ratios to form compounds
Who is John Dalton?
This is a substance that undergoes change in a chemical reaction
What is a reactant?
Burning wood creates ash, smoke, and heat. This is an example of this type of change
What is a chemical change?
The state of matter that has a definite volume but no definite shape.
What is a liquid?
Subatomic particles found in the nucleus with a NEUTRAL electrical charge.
What is a neutron?
J.J. Thomson discovered this negatively charged particle using his cathode ray tube experiment.
What is the electron?
This is a NEW SUBSTANCE formed as a result of a chemical reaction
What is a product?
Water freezing and then melting again is an example of this kind of change, because it can be reversed.
What is a physical change?
The measure of how much mass is packed into a certain volume of matter.
What is density?
Electrons that are in the outermost shell
What are valence electrons?
Ernest Rutherford’s gold foil experiment showed that atoms have a small, dense center called this.
What is the nucleus?
When vinegar and baking soda react, this gas is produced that makes bubbles.
What is carbon dioxide?
A chemical change always forms this type of substance
What is a new substance?
The state of matter where particles are charged and found in stars and lightning.
What is plasma?
The amount of electrons the innermost shell (aka the “first” shell), can hold
What is 2 electrons
This scientist proposed that electrons move around the nucleus in specific energy levels, like planets orbiting the sun.
Who is Niels Bohr? or Who is Bohr?
The name of a chemical reaction where oxygen reacts with a substance
During photosynthesis, plants use sunlight to turn carbon dioxide and water into glucose and oxygen is an example of this change
What is a chemical change?