Atoms and Molecules: Key Concepts and Differences

What is the primary focus of chemistry?

• The study of forces

• The study of matter and its changes

• The study of ideas

• The study of energy

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Which of the following is NOT considered matter?

• Energy

• Rocks

• Food

• Water

What property of matter is determined by its mass?

• Shape

• Volume

• Effect by gravity

• Color

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Which tool do scientists use to measure the mass of an object?

• Microscope

• Thermometer

• Balance

• Ruler

What does it mean if an object has volume?

• It is invisible

• It takes up space

• It has color

• It can float

How do scientists measure the volume of an object using a graduated cylinder?

• By weighing the object

• By measuring its length

• By observing how much water it displaces

• By checking its temperature

What are the tiny pieces that make up matter called?

• Particles

• Molecules

• Cells

• Compounds

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What is the smallest type of particle in the universe?

• Element

• Cell

• Molecule

• Atom

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What do you get when you combine different elements and atoms?

• Cells

• Molecules

• Compounds

• Mixtures

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What elements make up a water molecule?

• Two helium atoms and one oxygen atom

• Two oxygen atoms and one hydrogen atom

• Two hydrogen atoms and one oxygen atom

• One hydrogen atom and one oxygen atom

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