Properties
If a substance extinguishes a flame, it is...
NOT flammable
What are the 3 states of matter?
Solid, liquid, and gas
Is an atom big or small?
Small
Think back to the start of the unit.
What is our main focus of all of these experiments? What were we trying to figure out?
How bath bombs react
Which is bigger: an atom or a molecule?
Molecule
If a substance sinks, it is...
MORE dense
What state of matter is ice?
Solid
Name 5 things made of atoms.
Anything!
Except fire... and a few other things far out in space but that is college level!
What 2 ingredients react with water in the bath bomb?
Baking soda and citric acid
Which is more dense: paper or metal?
Metal
What are the 2 properties we have studied so far?
Density and flammability
What state of matter comes from bubbles?
Gas
Is matter usually more dense as a solid or gas?
Solid
How did we test flammability?
Putting a match near the gas
What types of atoms make up carbon dioxide?
Carbon and oxygen
What are the properties of helium?
Less dense and not flammable
What is water in the 3 states of matter?
Ice, water, and steam/vapor
A molecule is...
A combination (not mixture!) of atoms
How did we test density?
We had the beaker point up one time and down another time to see if it sank or rose
Is mixing water and salt a physical change or a chemical change?
Physical change - it is still the chemicals of salt and water
What are the properties of carbon dioxide?
More dense and not flammable
Is a change in the state of matter a physical change or a chemical change?
Physical change
If atoms are rearranged is it a physical change or chemical change?
Chemical change
Name and describe 3 experiments we have done this unit. Also tell me why we did them.
Crushing bath bombs; testing ingredients; testing flammability; testing density; testing heating water; testing electricity i9n water; showing flammability
Do you need to add a new chemical to create a chemical change?
No, you can also add electricity or heat!