Substances and Mixtures Lesson 1 check in

Which is the smallest piece of an element that still represents that element?

• a quark
• an compound
• an atom
• a molecule

What is matter?

• anything that you can see, hear or feel
• anything with mass that takes up space
• anything that can be burned
• anything that exists

Which describes the COMPOSITION of a pure substance?

• it is always the same
• it is not always the same
• it contains only one type of element
• it contains more than one type of element

Which is true of a compound?

• they contain at least three atoms
• they contain at least two elements that are bonded together
• they contain atoms of at least three different elements
• they contain only 1 type of atom

Some substances are chemically combined in specific combinations. These are ______________________.

• elements
• heterogenous mixtures
• homogenous mixtures
• compounds

Which item is a form of matter?

• air
• sound
• gravity
• light

A(n) _______________ is a substance made up of one kind of atom.

• compound
• element
• homogeneous mixture
• heterogeneous mixture

Matter with a composition that is always the same is called a(n)

• substance
• mixture

Which item is a substance?

• trail mix
• table salt
• salad

Which statement describes a compound?

• It contains a solute.
• Its composition can vary
• Its combination of atoms never changes.
• It is not chemically bonded.