You left your water in the freezer for too long; it's frozen. It has now experienced a Chemical Change.
False.
100
No new substance is formed.
Physical Change.
100
Why is seperating sand and gravel a physical change?
The sand and gravel is not changing chemical composition, they're just being seperated from each other.
100
You are running with your new clay project; you trip, and you have fallen and your clay project is in ruins. What is the physical change?
The clay project falling onto the ground and breaking is the physical change.
100
You're making breakfast, you pour yourself some milk, and turn to realize you have burned your eggs.
The eggs being burned is the chemical change.
200
You make yourself breakfast; toast, eggs, milk, sausage, etc. You take the butter out of the fridge and put it on the toast. The butter melts. This is an example of a Physical Change.
True.
200
Can be easily reversed.
Physical Change.
200
Why is milk souring a chemical change?
The change that milk is undergoing is irreversible, it's chemical composition is being altered.
200
You are cutting potatoes to make stew.
The potatoes being cut is the physical change.
200
You're out of breath and begin to breath heavily, in due time, you are much better.
The conversion of oxygen into carbon dioxide.
300
You cut your knee open. You run inside to get the Hydrogen Peroxide to prevent an infection. It begins to bubble. This is a Physical Change.
False.
300
Can be sped up with a catalyst.
Chemical Change.
300
Why is ice turning into water a physical change?
The ice can be frozen once again to form ice, the change is reversible.
300
You're outside, and your little sister's popsicle slides off her popsicle stick onto the ground. You come back later and the popsicle melted.
The popsicle melting.
300
You bike has been out in the storm and begins to rust very badly, it will soon not be rideable due to the rust being formed on the change.
The rust forming on the bicycle chain.
400
You are thirsty, so you make yourself some lemonade. This is an example of a Chemical Change.
False.
400
Energy is given off or absorbed.
Chemical Change.
400
Why is using gasoline a Chemical Change?
It's a chemical change because it's forming two whole new substances, water vapor and carbon dioxide.
400
You are boiling three cups of water, and became distracted and two hours later, you only had a single cup of water left.
The evaporation of water is the physical change.
400
You are outside in the sun playing basketball with your friends. You come back inside and realize your skin has darkened.
The darkening of your skin.
500
You put dry ice into water to create fog, the fog is produced and the reaction is over. This was a Physical Change.
True.
500
Sublimation occurs. (Dry Ice)
Physical Change.
500
Why is bread rising a chemical change?
It's a chemical change because the yeast in the bread is converting carbohydrates into carbon dioxide gas.
500
The jewerly maker melts silver and pours it into a ring mold.
The silver melting.
500
It is around lunch time, you feel yourself becoming hungry, but you have a basketball game later, so you eat a banana. Later in your basketball game you are energized and cramp free.