What do you need to have ready before starting the chemistry lesson?

• A calculator and a ruler

• A laptop and a charger

• A piece of paper and a pen or pencil

• A textbook and a highlighter

Which of the following is an example of a physical property?

• Formation of a gas

• Reactivity with acid

• Change in temperature

• Color of the material

What is a physical property?

• A property that changes the chemical composition of a substance

• A property that describes how a substance reacts with other substances

• A property that can be observed without changing the chemical identity of the substance

• A property that involves the formation of a new substance

Which of the following is an example of a physical change?

• Burning of magnesium

• Formation of a precipitate

• Melting of ice

• Rusting of iron

What happens to the chemical composition during a physical change?

• It forms a new substance

• It remains the same

• It changes completely

• It becomes a gas

Tags

NGSS.MS-PS1-1

Which of the following describes a chemical property?

• The color of a substance

• The melting point of a substance

• The density of a substance

• The reactivity of a substance with acid

Tags

NGSS.MS-PS1-5

What is a chemical property of water?

• It has a high boiling point

• It is a liquid at room temperature

• It can react with an electric current

• It is colorless

What is a chemical change?

• A change in the shape of a substance

• A change in the physical state of a substance

• A change in which a new substance is formed

• A change in which the chemical composition remains the same

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is evidence of a chemical change?

• Change in shape

• Change in size

• Change in color

• Change in state

Tags

NGSS.MS-PS1-2

What is the formation of a precipitate?

• A change in color

• Formation of a gas

• A change in temperature

• Formation of solid particles in a solution