# Properties And Composition Of Matter Unit Test: Question Preview (ID: 27444)

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How is density calculated?
a) By multiplying length, width, and height
b) Multiplying the number of electrons by the number of protons
c) Measuring the amount of mass per unit of volume
d) By measuring the force of gravity on an object

Which statement correctly identifies what happens when two substances chemically react with one another?
a) When two substances chemically react, there is a change in the state of matter
b) When two substances chemically react, a new substance is formed
c) The substances combine to become water
d) The substances combine to become fire

Anything that has mass and takes up space is an example of
a) energy
b) chemical change
c) matter
d) temperature

What happens to matter as its temperature increases?
a) The average kinetic energy of its particles decreases
b) The average thermal energy of its particles decreases
c) The particles gain kinetic energy
d) The particles lose potential energy

An ice cube is placed into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?
a) The molecules will begin to move slower
b) The molecules will begin to move faster
c) The molecules will begin to increase in density
d) The molecules will begin to condense in air

Which characteristic of aluminum allows it to be made into aluminum foil?
a) it is dense
b) it is soluble
c) it is magnetic
d) it is malleable

How is plasma different from gas?
a) The particles in plasma are magnetic
b) The particles in plasma can break away from each other
c) The particles in plasma have a set volume
d) The particles in plasma have electric charges

Which property applies to matter that consists of particles vibrating in place?
a) has a definite shape
b) takes the shape of a container
c) flows easily at room temperature
d) particles far apart

The melting point of a solid is 24.9 degrees Celsius. As heat is added to melt the solid, what happens to the particles?
a) The motion of the particles increases
b) The motion of the particles decreases
c) The particles move farther apart
d) The particles move closer together

An example of a property of matter that can be observed without changing the identity of the matter is
a) flammability
b) reactivity
c) solubility
d) ability to rust

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