What three physical states does matter occur in?
Solid, liquid, and gas.
What determines a solid’s shape?
Its own shape, independent of its container.
What shape does a liquid take when poured into a container?
The shape of its container.
Which part of a liquid is called its free surface?
The part in contact with air.
What is the shape and orientation of a liquid’s free surface?
Plane and horizontal.
What two volume changes can gases undergo?
They can be compressed and expanded.
What space does a gas occupy?
All the space available to it.
Which examples of solids are given?
Ice, rock, and sand.
Which examples of liquids are given?
Water, oil, and milk.
Which examples of gases are given?
Air and water vapor.
Can liquids be grasped with the fingers?
No, liquids cannot be grasped with the fingers.
Why can a gas not be grasped with the fingers?
It cannot be grasped with the fingers.
Why are liquids and gases classified as fluids?
They flow.
What happens to solids when they are grasped?
They do not deform.
Answer 5 questions on States of Matter and Their Properties.
1. A student sorts water, oil, sand, air, and water vapor by physical state. Which classifications are correct?
2. A liquid is poured into a narrow vessel and left undisturbed. Which statements describe its shape and free surface?
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