Semester 1 Chemistry Test

Front

(6.4×10^-8) ÷ (2×10^-14)

Back

3.2×10^6

Front

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

Back

A chemical change creates a new substance.

Front

Who is responsible for cleaning up the lab or classroom?

Back

Each and every student.

Front

What tool measures mass?

Back

Balance.

Front

What does the Law of Conservation of Mass state?

Back

Matter can neither be created nor destroyed.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is the pH scale used for?

Back

To measure the acidity or basicity of a solution.

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 significance of the periodic table?

Back

It organizes elements based on their atomic number and properties.