CBA2 Review

Front

What is a physical change?

Back

A physical change is a change in which no new substance is formed. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new substances. Examples include rusting, burning, and souring of milk.

Front

What does it mean for forces to balance each other?

Back

When forces balance each other, it means that the net force acting on an object is zero, resulting in no change in motion.

Front

How can you tell if an equation is balanced?

Back

An equation is balanced when the number of atoms of each element is the same on both sides of the equation.

Front

What are metals?

Back

Metals are elements that are mostly shiny, silver or gray in color, malleable, ductile, and good conductors of heat and electricity.

Front

What is the difference between physical and chemical properties?

Back

Physical properties can be observed without changing the substance (e.g., color, melting point), while chemical properties describe a substance's ability to undergo chemical changes.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is the reaction of vinegar and baking soda, which produces carbon dioxide gas.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What are nonmetals?

Back

Nonmetals are elements that are generally not shiny, are poor conductors of heat and electricity, and can be gases or brittle solids at room temperature.