Physical or chemical change?
Ice to water or water to ice
Physical change
Is oxygen a liguid?
No oxygen is a gas
Which one is a chemical change, #1 baking a cake, #2 chopping wood?
#1 chopping wood
What is the definition of a solid?
Solid is densely packed and has a definite shape and a definite volume.
True or false ”A chemical change is irreversible“
True
True or false gas molecules are loosely packed,move around a lot , of kinetic energy
True
True or false “A phyical change always creates new substances”
FLASE
Does a liquid ever have a definite shape?
No it doesn’t
If a physical change doesn’t create new substances then why is ice to water (or other way around) a physical change?
Because the heat from the sun or freezing point from coldness will melt the the ice back to water or freeze the water back to ice
What is the melting point for a solid to liquid and what is the evaporating point for a linquid to turn into a gas
melting point for a solid to a liguid to 0 decrees Celsius and evaporating point for a liguid into solid is 100 decrees celsius.