8th Q2 Quarterly Review

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals.

Front

What does a pH of 6 indicate about a substance?

Back

It is slightly acidic.

Front

In an experiment, what is the dependent variable?

Back

The outcome that is measured, such as the height of the eruption in a volcano model.

Front

What happens when a proton is added to an element?

Back

It changes the element to another element.

Front

What does the law of conservation of mass state?

Back

Mass may be rearranged, but not destroyed during physical or chemical changes.

Front

What are the properties of metals?

Back

Metals are typically shiny, good conductors of heat and electricity, malleable, and ductile.

Front

What are nonmetals?

Back

Elements that are usually poor conductors of heat and electricity and have properties opposite to metals.

Front

What is the pH scale?

Back

A scale used to measure how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic).

Front

What is an independent variable in an experiment?

Back

The variable that is changed or controlled to test its effects on the dependent variable.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.