Lesson 1: Matter: Properties and Changes

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H) and oxygen (O).

Front

Which of the following can be found on the periodic table?

Back

Element.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together. Example: Water (H2O) is a compound made of hydrogen and oxygen.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded. Example: Air is a mixture of gases.

Front

What does conductivity refer to?

Back

The ability of a material to conduct heat or electricity. Materials with high conductivity allow heat and electricity to pass through easily.

Front

How many elements are in the formula C6H12O6?

Back

3 (Carbon, Hydrogen, and Oxygen).

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the chemical formula for table salt?

Back

NaCl (sodium chloride), which is a compound made of sodium and chlorine.

Front

What is the definition of a homogeneous mixture?

Back

A mixture that has a uniform composition throughout. Example: Saltwater.

Front

What is the definition of a heterogeneous mixture?

Back

A mixture that consists of visibly different substances or phases. Example: Salad.