Solids
What is an example of solids in real life?
Rock, table, metal
What is an example of liquids in real life?
Water, juice, milk
What is an example of gases in real life?
Air, burps, farts
What does it mean to go through a physical change?
No new substances are made. It can go back to its original form.
What does it mean to go through a chemical change?
New substances are made. It can't go back to its original form.
What is a characteristic of a solid?
It has a fixed shape.
What is a characteristic of a liquid?
It takes flows and takes the shape of its container.
What is a characteristic of a gas?
It fills up the space.
What is another term for physical changes?
Reversible change.
What is another term for chemical changes?
Irreversible change.
When you change solids to liquids, what is it called?
Melting
When you change liquids to gas, what is it called?
Evaporation
When you change gas to liquids, what is it called?
Condensation
True or false: Baking bread is a physical change.
False
True or false: Baking bread is a chemical change.
True
Give an example of melting other than ice.
Ice cream or chocolate melting.
When you change liquids to solids, what is it called?
Freezing
Give an example of condensation, other than the shower.
Condensation on cold glass of drink or on a can.
Give an example of physical change other than water.
Chopping wood, cutting paper
Give an example of chemical change other than cooking or baking.
Fire burning, rusting metal
When you change solids to gases, what is it called?
Sublimation
Give an example of evaporation other than water.
Hot cup of coffee or when cooking.
When you change gases to solids, what is it called?
Deposition
Why is boiling water a physical change?
Because the water that you boil can evaporate into gas and that gas can cool down back into liquid, going back to its original form.
Why is digesting food in your stomach a chemical change?
Because your stomach acid is breaking down the food you ate so your body can absorb it easily. You also cannot undigest food.