Molecules Quiz: Can You Get 8 Out of 10?
This molecules quiz covers what molecules are, molecular formulas, water and carbon dioxide, oxygen and ozone, molecule shapes, DNA and how scientists picture molecules. Can you get 8 out of 10 on the tiny structures that make up the world?
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🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds
Definition
What is a molecule?
Water
What is the chemical formula for water?
Gas
What is the formula for carbon dioxide?
Ozone
Ozone molecules are made of how many oxygen atoms?
Shape
What shape is a water molecule?
Methane
What shape is a methane molecule?
DNA
DNA is what kind of molecule?
Avogadro
How many molecules are in one mole of a substance?
Buckyball
Which soccer-ball-shaped molecule has 60 carbon atoms?
Seeing
Which technique revealed DNA's structure?
Your score
0/10
Scroll down to see the explanation for each question.
Explanations: answer key for all 10 questions
- Q1: What is a molecule?
Answer: Two or more atoms bonded together
Molecules can be elements or compounds.
- Q2: What is the chemical formula for water?
Answer: H2O
Two hydrogen atoms bond to one oxygen atom.
- Q3: What is the formula for carbon dioxide?
Answer: CO2
We breathe it out and plants take it in.
- Q4: Ozone molecules are made of how many oxygen atoms?
Answer: Three
The ozone layer protects us from UV light.
- Q5: What shape is a water molecule?
Answer: Bent
Its angle is about 104.5 degrees.
- Q6: What shape is a methane molecule?
Answer: Tetrahedral
Its four hydrogen atoms spread evenly around carbon.
- Q7: DNA is what kind of molecule?
Answer: A very large molecule called a polymer
Human DNA in one cell stretches about 2 meters if unwound.
- Q8: How many molecules are in one mole of a substance?
Answer: About 6.02 × 10²³
This is Avogadro's number.
- Q9: Which soccer-ball-shaped molecule has 60 carbon atoms?
Answer: Buckminsterfullerene
It was discovered in 1985.
- Q10: Which technique revealed DNA's structure?
Answer: X-ray crystallography
Rosalind Franklin's images were crucial.
Molecules Quiz – The Building Blocks of Substances
A molecule is a group of atoms held together by chemical bonds. Some molecules are tiny, like oxygen with two atoms, while others are huge, like DNA with billions. Their makeup and shape determine how substances behave.
Chemists describe molecules with formulas such as H2O for water and CO2 for carbon dioxide. Shapes matter too: water's bent shape makes it a polar molecule, which explains why it dissolves salt and has high surface tension.
Scientists study molecules with X-ray crystallography, spectroscopy and powerful microscopes. Understanding molecules helps design new medicines, materials and technologies, from plastics to batteries.
What This Quiz Teaches
This quiz is for students exploring molecules.
- What a molecule is
- What water and CO2 formulas are
- What ozone is
- What shapes molecules have
- How scientists see them
Did You Know?
- Proteins are long chains of amino acids.
- Graphene is a single layer of carbon atoms.
- Smell detects molecules in the air.
- Salt forms crystals rather than molecules.
- Some molecules are left- and right-handed.
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