Atoms & Molecules
Question: What is the tiniest piece of matter that makes up everything around you?
Hint: You can’t see it with your eyes, but it’s in every substance.
Answer: Atom
Question: What is the “glue” that holds atoms together in a molecule?
Hint: It’s not real glue, but it keeps atoms connected.
Answer: Chemical bond
Question: What do scientists use to show molecules that are too small to see?
Hint: It can be a picture, a ball-and-stick, or a computer image.
Answer: Model
Question: What does “composition” of a molecule mean?
Hint: It’s about the ingredients.
Answer: What atoms a molecule is made of and how many
Question: What do you get when two or more atoms stick together?
Hint: It’s like letters forming a word.
Answer: Molecule
Question: True or False: Molecules are formed when atoms bond.
Hint: Think about what happens when tiny pieces of matter stick together.
Answer: True
Question: In models, what color usually represents oxygen?
Hint: Think of the color of fire or blood.
Answer: Red
Question: What does “structure” of a molecule mean?
Hint: It’s about how the atoms are connected or arranged.
Answer: The arrangement of atoms in a molecule
Question: How can just adding one extra oxygen atom to water change it into a dangerous substance?
Hint: Compare H₂O and H₂O₂.
Answer: It becomes hydrogen peroxide, which can burn skin.
Question: Why do molecules form?
Hint: Atoms are happier when they are connected in certain ways.
Answer: Atoms bond to form molecules because they become more stable.
Question: What color is typically used to represent carbon in a molecule model?
Hint: It’s the same color as coal.
Answer: Black
Question: Butane and isobutane have the same atoms. What makes them act differently?
Hint: Think LEGO blocks — same pieces, different shapes.
Answer: Their atoms are arranged differently (different structure)
Question: Which molecule keeps you alive: water or hydrogen peroxide?
Hint: One is safe to drink, the other can be harmful.
Answer: Water (H₂O)
Question: What could happen if a chemical bond changes in a molecule?
Hint: Think of H₂O vs. H₂O₂.
Answer: The substance can have very different properties or effects.
Question: In a model, hydrogen is usually represented by which color?
Hint: It’s the color of snow.
Answer: White
Question: Give an example of a molecule where a tiny change in atoms changes the substance completely.
Hint: Compare the molecule you drink to one that can burn your skin.
Answer: H₂O (water) vs. H₂O₂ (hydrogen peroxide)
Question: If a molecule has 2 hydrogens and 1 oxygen, what is it called?
Hint: It’s the same molecule we drink every day.
Answer: Water (H₂O)
Question: How many hydrogen atoms are in hydrogen peroxide?
Hint: It’s the same as in water.
Answer: 2 hydrogen atoms
Question: Why do scientists use ball-and-stick models for molecules?
Hint: It helps them “see” tiny particles that are invisible.
Answer: To show the arrangement of atoms and the bonds between them.