Which statement is true?
Matter can be changed from one form to another by heating and cooling.
Matter cannot be changed at all.
Matter can be changed from one form to another only by heating.
Matter can be changed from one form to another only by cooling.
Which is necessary for evaporation?
Light
Heat
Air
Oxygen
What is solubility?
The ability of a substance to float in a liquid
Mass per unit of volume
The ability of a substance to dissolve in a liquid
The ability of a substance to melt on heating
The ability of an object to float in a liquid is known as:
Density
Buoyancy
Solubility
Conversions
The smallest unit of a substance that has all the properties of that substance is called:
Atoms
Molecules
Matter
Minerals
Why do liquids flow?
Because molecules are close to each other
Because molecules don’t move freely
Because molecules are less closely packed
Because molecules are separated by large empty spaces
Which is known as the wonder liquid?
Blood
Water
Saliva
Amino acid
A liquid is said to be miscible if it:
Does not dissolve in another liquid
Dissolves completely in another liquid
Floats on the surface of the other liquid
Dissolves partially in the other liquid
In how many forms is water found in nature?
One
Two
Three
Four
Which is the solid state of water?
Ice
Steam
Mist
Dew
