What is the movement of air from an area of high concentration to an area of low concentration
100
Define chemical reaction.
What is a process when one or more substances are being changed into other substances.
100
When matter changes it's state.
What is a chemical reaction
100
What two elements is carbon dioxide made of?
What are oxygen and carbon.
200
The reason acids are important to our health.
What is they digest food in our stomachs and keep our bodies healthy
200
Define the Kinetic Theory of Matter.
What is all matter is made of small particles that are in constant motion.
200
What a chemical reaction releases.
What is energy
200
The most common matter in the universe.
What is plasma.
200
The reason plants use carbon dioxide.
What is to make food.
300
The reason bases are important to people.
Blood is a base and we use soap (another base) to kill germs.
300
Define semi-permeable.
What is something that will let some things pass through it but not all things.
300
The layers of electrons surrounding the nucleus of an atom.
What are shells.
300
Changes in the state of matter are __________ changes.
What are physical changes.
300
Plants take in what gas from the air?
What is carbon dioxide.
400
Is it okay to taste a substance if you do not know what it is?
NO!
400
Define Osmosis.
What is the movement of a substance through a semi-permeable membrane.
400
What has to happen for an atom to be the most stable.
What is have a full shell.
400
Tell me what the big letter is in the middle of a square on the period table.
What is the element symbol
400
Define mixture
What is a blend of two or more substances that have NOT combined chemically.
500
The reason cake rises
What is a chemical change that creates carbon dioxide bubbles.
500
What happens to a piece of meat in water vs. salt water.
In the water the cells would expand and absorb the water. In the salt water, the cells would have the water sucked out of it and the meat would shrivel.
500
How many states of matter are there?
What are 4.
500
The top left of a square on the period table tells you the _____________.
What is the atomic number
500
The substance is dissolved in a solution called the ________________.