Chemistry Unit Test

Front

What happens to particles when more heat is supplied to a system?

Back

They speed up.

Front

How many atoms of Hydrogen are in the compound H2O?

Back

2

Front

What is the difference between natural and synthetic resources?

Back

Natural resources occur in nature, while synthetic resources are man-made.

Front

Heat transfers from ______ objects to cold objects.

Back

Hot.

Front

What does minimum criteria for temperature in a project mean?

Back

This is the lowest temperature acceptable for the project.

Front

What is the definition of an atom?

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.