8th Grade Unit 1 2025 Review

Which of the following is a physical change?

• Melting ice

• Burning wood

• Rusting iron

• Baking a cake

Tags

NGSS.MS-PS1-4

What is the law that states mass is neither created nor destroyed in a chemical reaction?

• Law of Definite Proportions

• Law of Conservation of Mass

• Law of Multiple Proportions

• Law of Constant Composition

Tags

NGSS.MS-PS1-5

Which of the following is a metalloid?

• Sodium

• Silicon

• Oxygen

• Gold

• Number of oxygen atoms

• Number of hydrogen atoms

• Number of molecules

• Number of compounds

Tags

NGSS.MS-PS1-1

Which of the following is evidence of a chemical change?

• Change in shape

• Change in color

• Melting

• Boiling

Tags

NGSS.MS-PS1-2

Which element is a nonmetal?

• Iron

• Carbon

• Aluminum

• Copper

What is the formula to calculate density?

• Mass + Volume

• Mass / Volume

• Volume / Mass

• Mass × Volume

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Which of the following is a chemical change?

• Dissolving sugar in water

• Freezing water

• Burning paper

• Breaking glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

• Number of hydrogen atoms

• Number of oxygen atoms

• Number of water molecules

• Number of compounds