Atoms and Matter

A sample of matter is made of identical particles. The sample could be

• an element.

• a compound.

• a mixture.

• all of the above

The smallest particle of an element is

• an atom.

• a mixture

• a molecule

• a compound

Which statement BEST describes an atom?

• Atoms are the smallest particles of matter that are still elements.

• Atoms are composed of one or more elements in a fixed ratio.

• Atoms are broken down by physical means into subatomic particles.

• Atoms are tiny energy packets that produce a beam of light.

Tags

NGSS.MS-PS1-1

An atom can BEST be described as

• the smallest particle that has all the characteristics of a compound.

• the smallest particle that has all the characteristics of an element.

• a charged particle that is larger than a molecule.

Tags

NGSS.MS-PS1-1

What is the smallest part of a gold ring that is still gold?

• an atom

• an electron

• a molecule

• a compound

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

A student has two pieces of aluminum foil. Each piece can be folded and rolled into a wire. Why do both pieces of aluminum foil behave the same way?

• They are composed of the same types of atoms.

• They are composed of different types of atoms.

• They have the same physical properties, but different chemical

  properties.

• They have the same chemical properties, but different physical

  properties.

Tags

NGSS.MS-PS1-1

The separate atoms that make up a wooden table CANNOT be seen because the atoms are

• too small.

• moving too fast.

• packed tightly together.

• hidden beneath the surface.

What happens at the boiling point of a substance?

• liquid becomes a gas

• solid becomes a gas

• liquid becomes a solid

• solid becomes a liquid

Tags

NGSS.MS-PS1-4

When ice melts, it becomes a

• gas

• solid

• liquid

• plasma

Tags

NGSS.MS-PS1-4

When liquid water freezes, it forms ice. What is the physical state of an ice cube?

• gas

• solid

• liquid

• plasma

Tags

NGSS.MS-PS1-4