2024 Phy Sci--Chapter 2 Test Review

Front

True/False: Pure substances CAN be separated.

Back

False

Front

A change that results in the formation of new substances with new properties is called a ________________.

Back

chemical change

Front

Put 34,500,000 into scientific notation.

Back

3.45 x 10^7

Front

Which of the following can not be classified as a pure substance? O2, CO2, H2O + NaCl, C12H22O11

Back

H2O + NaCl

Front

This is a substance that cannot be broken down into simpler substances: compound, mixture, element, atom.

Back

element

Front

Define a pure substance.

Back

A material that has a constant composition and consistent properties throughout.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

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 difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down, while a compound is made of two or more elements chemically bonded together.