Exploring the Law of Conservation of Mass

What are the basic building blocks of all things?

• Tissues
• Atoms

• Organisms
• Cells

What does the law of conservation of mass state about isolated systems?

• Mass and energy can be created but not destroyed

• Mass and energy can neither be created nor destroyed

• Only energy can be created and destroyed

• Only mass can be transferred out of the system

What molecules are formed when carbon, hydrogen, and oxygen atoms combine with energy?

• Water and carbon dioxide

• Methane and helium

• Sulfur dioxide and hydrogen

• Nitrogen and oxygen gas

How many hydrogen atoms are in a molecule of methane?

• 5
• 4
• 3
• 2

What happens when methane combusts with oxygen?

• It releases light and heat without changing

• It forms water and carbon monoxide

• It converts into hydrogen gas and carbon

• It transforms into carbon dioxide and water, releasing energy

What happens to mass during a chemical reaction, according to the law of conservation of mass?

• Mass increases during a chemical reaction.
• Mass can be created or destroyed in a reaction.
• Mass remains the same chemical reaction.

• Mass changes depending on the temperature of the reaction.

How many carbon dioxide molecules result from combusting propane?

• Three

• Two

• Four

• One

What fundamental cosmic event is responsible for the creation of hydrogen atoms?

• Formation of the Moon

• The Big Bang

• Black holes merging

• Supernova explosions

How do stars contribute to the formation of heavier elements like carbon and oxygen?

• Through chemical reactions with space dust

• By absorbing cosmic radiation

• By breaking down larger molecules

• Through nuclear fusion of lighter elements

What does Einstein's famous equation imply about mass and energy?

• Mass can convert into energy

• Neither A nor B

• Energy can transform into mass

• Both A and B