Science 8 Third Quarter Exam

What is matter?

• Anything that occupies space and has a symbol.

• Anything that occupies space and has mass.

• Anything that has mass and fixed position.

• Anything that has mass and temperature.

How many states of matter exist?

• 1

• 2

• 3

• 4

Why is air considered matter?

• Because it is invisible

• Because it does not occupy space

• Because it has mass and occupies space

• Because it cannot be compressed

What property enables solids to maintain their shape?

• High compressibility

• Fixed arrangement of particles

• Random motion of particles

• Large spaces between particles

Which material would you use to demonstrate the incompressibility of solids?

• Rubber

• Water

• Sand

• Metal

A student claims that deposition and sublimation are opposite processes. Which observation supports this claim?

• Both require energy to occur.

• Deposition converts a gas to a solid, while sublimation converts a solid to a gas.

• Deposition occurs in high temperatures, while sublimation occurs in low temperatures.

• Both occur when liquids are present.

Which subatomic particle has no charge?

• Proton

• Electron

• Neutron

• Atom

What is the atomic number of an element equal to?

• The number of neutrons

• The number of protons

• The number of electrons and neutrons combined

• The mass number

What is the smallest unit of matter?

• Atom

• Molecule

• Compound

• Proton

Why are isotopes of the same element chemically similar?

• They have the same number of neutrons.

• They have the same number of protons and electrons.

• They have the same atomic mass.

• They have different chemical properties.