Something about substance that allows us to tell it apart from other substances is .....
A property
15
Temperature at which particles throught a liquid have enough energy to change to a gas is .....
boiling point
15
Liquids change to gases when they boil and evaporate. True or false?
True
15
The process when particles on the surface of a liquid change into a gas is called .....
Evaporation
15
The process when all the particles in the liquid have enough energy to become a gas is .....
Boiling
15
Evaporation can occur at any temperature, but most liquids boil when they are .....
heated
15
Gases have true properties : take up space and have mass. True or false?
True
15
We can't feel air unless it is .....
moving
15
What is thermal conductor?
Materials that conduct heat
15
Metals are conductor. True or flase?
True
15
Plastic, wood, and paper are conductor. True or false?
False, they are insulator.
15
When something changes and it can turn back. we call it .............. change.
reversible
15
Dissolving is reversible or irreversible?
reversible
15
Metal rusting is reversible or irreversible?
irreversible
15
Anton making 2 glasses of sweet tea but he uses different temperature of water. In the first glass, the water is 40 degree C. In the second glass the water is hotter. In which glass will the sugar dissolve faster?
second glass, because the temperature is higher.
15
Ms Yaya uses vinegar and baking soda to make bubbles (carbon dioxide). What are the reactant in the reaction?