Examen de Materia para 7Th Grade

What is matter?

• Something that cannot be seen or touched

• Anything that has mass and occupies space

• A type of energy

• A chemical reaction

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

• Burning paper

• Metal rusting

• Melting ice

• Fireworks exploding

Which state of matter has a definite shape and volume?

• Liquid

• Solid

• Gas

• Plasma

What happens to the particles in a liquid when it turns into a gas?

• They slow down and come closer together

• They move faster and spread apart

• They stay in place

• They form a rigid structure

Which tool would you use to measure the volume of an irregularly shaped object?

• Ruler

• Thermometer

• Graduated cylinder

• Spring balance

What is the smallest unit of an element?

• A molecule

• An atom

• A compound

• A cell

When water boils and turns into steam, what type of change is occurring?

• Chemical change

• Physical change

• Nuclear change

• Biological change

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

• Freezing water

• Dissolving sugar in water

• Breaking a glass

• Baking a cake

What happens to the mass of a substance when it undergoes a physical change?

• Increases

• Decreases

• Remains the same

• Becomes zero

What happens during condensation?

• A solid turns into a liquid

• A gas turns into a liquid

• A liquid turns into a gas

• A liquid turns into a solid