Final 2025 Science Test

What is the smallest unit of an element?

• Molecule

• Atom

• Compound

• Ion

Which of the following is a chemical property?

• Melting point

• Boiling point

• Density

• Reactivity

Which of the following is a physical change?

• Burning wood

• Rusting iron

• Melting ice

• Baking a cake

What is the process called when a solid turns directly into a gas?

• Condensation

• Evaporation

• Sublimation

• Melting

What happens to the particles of a substance when it is heated?

• They stop moving

• They slow down

• They move faster

• They freeze

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is a mixture?

• Water

• Table salt

• Air

• Carbon dioxide

What is a homogeneous mixture also known as?

• Compound

• Solution

• Suspension

• Element

Which of the following is a heterogeneous mixture?

• Saltwater

• Air

• Trail mix

• Vinegar

What tool is most commonly used to measure mass?

• Thermometer

• Graduated cylinder

• Balance scale

• Ruler

What is the unit for volume of a liquid?

• Grams

• Meters

• milliliters

• Kilograms