Science Quiz on Materials and Changes

What was the impact of the invention of the electric fan on household comfort?

• increased noise levels

• reduced air circulation

• decreased home ventilation

• improved air circulation and cooling

Which of the following materials is known for being highly combustible?

• glass

• metal

• water

• wood

What happens to glass when exposed to high temperatures?

• it melts

• it changes color

• it becomes harder

• it becomes transparent

What does the term "flammability" refer to?

• The ability of a material to dissolve in water

• The ability of a material to conduct electricity

• The ease with which a material can catch fire and burn

• The tendency of a material to react with oxygen in the air

Which of the following is an example of a flammable material?

• glass

• metal

• paper

• rock

Which material is considered biodegradable?

• Styrofoam

• banana peel

• nylon fishing line

• plastic drinking straw

When wood is burned, it turns into ash and releases heat. Which of the following best describes this process?

• combustion

• condensation

• evaporation

• sublimation

What is a physical change?

• A change where heat is produced

• A change where new substances are formed

• A change in the chemical structure of a substance

• A change in the state or appearance of a substance without changing its chemical composition

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

• Boiling water

• Burning wood

• Freezing water

• Melting ice

What happens to water when it is frozen?

• it evaporates

• it condenses

• it changes into gas

• it changes into ice