Law of Conservation of Mass
Physical Vs. Chemical Change
Heat Flow
Law of Conservation of Energy
Energy Transformation
100
What does this law say?
Mass cannot be created or destroyed
100
Water freezing to ice
Physical Change
100
In what direction does heat flow?
Hot to cold
100
What does this law say?
Energy cannot be created or destroyed, only transformed
100
You eat a banana and then you go play a game of soccer
Chemical energy to mechanical energy
200
The equation for photosynthesis is 6CO2 + 6H2O --> C6H12O6 + 6O2. What are the reactants?
Carbon dioxide and water
200
Mixing baking soda and vinegar to create sodium acetate, water, and carbon dioxide
Chemical Reaction.
Bonus question: How do you know?
200
What method of heat transfer is occurring in order to boil the water?
Convection
200
This is stored energy or energy of position
Potential energy
200
You plug in a fan to cool down your room
Mechanical energy to electrical energy to mechanical energy
300
The equation for photosynthesis is 6CO2 + 6H2O --> C6H12O6 + 6O2. What are the products?
Glucose & Oxygen
300
You rip a piece of paper
Physical Change
300
If you put a cold spoon in a cup of hot tea, describe how heat will flow and how the temperature will change.
Heat flows from hot tea to cold spoon. Temperature of tea decreases, temperature of spoon increases
300
This is the energy an object has by being in motion
Kinetic energy
300
You turn a hand crank that turns on a light bulb
Mechanical energy to Radiant energy
400
In a closed system, what can you expect the mass of your product to be, if the mass of your reactants was 17.8 g?
17.8 g
400
A banana turning brown over time
Chemical Change
Bonus question: How do you know?
400
A pan is placed on a gas stove. What method of heat flow is occurring from the fire from the stove to the pan?
Radiation
400
What point(s) is potential energy the highest in this pendulum?
A & E
400
An archer aims and shoots an arrow at a target
Elastic potential energy to kinetic energy
500
You conduct an experiment by mixing together baking soda and vinegar in a 100 mL beaker. The mass of your reactants was 132 g. The mass of your products was 112 g. What happened to the missing mass? Be specific!
The experiment was in an open system. Gas was produced, and it spread out into the room.
500
Baking a cake
Chemical Change
Bonus Question: How do you know?
500
Does ice cool down your water, or does water warm up your ice? Explain
Water warms up your ice, because heat flows from hot to cold
500
What point(s) is the kinetic energy highest on this pendulum?
C
500
You hold two tennis balls at different heights. You drop them to the floor. Which one will bounce higher: the one at the lower height or the taller height? Why?
Taller height bounces higher because it has a higher amount of gravitational potential energy