Matter Unit Recap-7th Grade

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. For example, water (H2O) is a compound made of hydrogen and oxygen.

Front

What is the role of a solvent in a solution?

Back

A solvent is the substance in which a solute is dissolved to form a solution. In a saltwater solution, water is the solvent.

Front

What does it mean when we say a solution is saturated?

Back

A saturated solution is one in which no more solute can dissolve at a given temperature and pressure.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

Front

What are rare earth elements?

Back

Rare earth elements are a group of 17 elements that are difficult to mine and are used in various high-tech applications, such as electronics and magnets.

Front

What property of metals allows them to be shaped into thin sheets?

Back

Malleability is the property of metals that allows them to be hammered or rolled into thin sheets without breaking.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Each substance retains its own properties.

Front

What is the definition of solubility?

Back

Solubility is the ability of a substance (solute) to dissolve in a solvent at a given temperature and pressure.

Front

What is the significance of stirring a solution?

Back

Stirring a solution increases the rate at which solutes dissolve but does not affect the maximum amount that can dissolve.

Front

What are nonmetals?

Back

Nonmetals are elements that typically lack the properties of metals, such as conductivity and malleability. Examples include oxygen and sulfur.