134: Physical Change and Mass (Higher) Flashcards
What happens to the mass of ice when it melts?
The mass does not change
What kind of change is melting ice?
A physical change because it is reversible
How do you know there is a physical change happening?
Because there are no new substances being made
What happens to the total mass when ice melts to water?
It stays the same
What are sugar and water made of?
particles
If we still have exactly the same particles, the we have exactly the same _____
mass
what happens to the mass of sugar when it dissolves in water?
The mass does not change
When we melt ice or dissolve sugar do we have the same amount of particles in the substance as when we started?
yes
If you leave water for a few days will the mass change or not?
yes the mass will change because water molecules from the water escape from the glass into the air
What process happens when water is left out on a window-sill?
Evaporation
How does evaporation change the mass of a liquid?
As the liquid particles rise up and escape the container
Where does the water escape to when it’s evaporated?
into the air
If i add 100g of soup to 500g of water what is the mass?
600g
