Physical Properties
What are the three states of matter, in order of most to least dense?
solid, liquid, gas
Ice melting into water
physcial change
What is the only proof of a chemical change?
Formation of a new substance
What is the name of the substances on the left side of the chemical equations?
What science do I have a degree in?
Biology
What is the density of an object with a mass of 4g and a volume of 2mL?
2g/mL
Paper burning
chemical change
What are the 4 signs of a chemical change?
1. change in color
2. change in odor
3. change in energy
4. formation of bubbles
What is the name of the substances on the right side of a chemical equation?
products
Where did I go to college?
University of Rhode Island
What are 2 things that happen to the particles of an object when you increase thermal energy?
faster and further apart
Cutting aluminum into smaller pieces
When observing a fire, what are the signs of a chemical change that are present?
change in color, change in odor, change in energy (light, sound, thermal)
Is this equation balanced?
C2H4O2 + NaHCO2 -> NaC2H3O2 + H2O + CO2
No, not enough Os on the reactant side.
What subject does Miss Ryall (my bestie) teach?
Social Studies
If I add a 2g object to a graduated cylinder that has 2mL of water in it and the water level goes up to 6mL, what is its density?
0.5g/mL
Chemical change
How do you know a chemical change has occured when a banana rots? (signs and proof)
signs: change in odor and change in color
proof: it is no longer a ripe banana and does not have the same properties
___ CO2 + ___ H2O -> ___ C6H12O6 + ___ O2
6 CO2 + 6 H2O -> C6H12O6 + 6 O2
What month did I get married?
Draw a phase change graph, showing 3 states of matter and 2 changes.
3 slanted lines: solid, liquid, gas
2 flat lines: melting and evaportating
Water boiling
Physical change
How is baking brownies both a physical and a chemical change at the same time?
physical change: liquid to solid
chemical change:
- signs: change in odor, change in color, change in energy
- proof: formation of a brownie (vs. batter) with new properties
11.5g, the Law of Conservation of Mass states that mass of the reactants equals the mass of the products. Mass cannot be created or destroyed.
What are the names of my four cats?
Roger, Willow, Tini, Clementine