Exploring Physical and Chemical Reactions

What are the two main types of reactions discussed in chemistry?

• Physical and Chemical

• Physical and Biological

• Chemical and Biological

• Biological and Mechanical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

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

• Boiling water

• Burning wood

• Digesting food

• Rusting iron

What remains unchanged in a physical reaction?

• The chemical composition

• The temperature

• The state of the material

• The color

What is produced in a chemical reaction?

• The same substances with different colors

• New substances with the same characteristics

• The same substances with different states

• New substances with different characteristics

Tags

NGSS.MS-PS1-2

What is required to initiate the burning of wood?

• Water

• Oxygen

• Heat

• Cold

At what temperature does wood start to decompose during burning?

• 100°F

• 200°F

• 300°F

• 400°F

What are the two forms of decomposed material released when wood burns?

• Smoke and ash

• Water and smoke

• Smoke and char

• Char and water