Question 1 of 5
What makes something matter?
Answer & explanation
It has mass and occupies space
Gases are matter too because they have mass and take up space.
5 questions · Untimed · Free
Science & Nature
Start with the everyday and look a little closer. Explore matter, melting ice, mixtures, and cells in five questions, with an explanation after every answer.
0 of 5 answeredYour first question is ready.
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Question 2 of 5
When ice melts, what happens to the water molecules?
Answer & explanation
They remain H₂O while their arrangement and motion change
Melting is a physical transition, not decomposition of H₂O.
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Question 3 of 5
Is air an element, compound, or mixture?
Answer & explanation
A mixture
Air contains several gases, chiefly nitrogen and oxygen, rather than one pure substance.
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Question 4 of 5
Why is water classified as a compound?
Answer & explanation
Hydrogen and oxygen are chemically combined in a definite ratio
Water molecules contain hydrogen and oxygen in a fixed two-to-one atomic ratio.
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Question 5 of 5
Which structure encloses most DNA in a typical eukaryotic cell?
Answer & explanation
The nucleus
A membrane-bound nucleus separates most eukaryotic DNA from the surrounding cytoplasm.
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FROM ANSWERING TO UNDERSTANDING
What you can learn from this quiz
- What counts as matter, including gases
- Melting ice, mixtures and compounds
- The nucleus in a typical eukaryotic cell
A way to learn more from each answer
Look for the distinction each question is testing. Is it about a material’s properties, a change in its state, or how its components are combined? After answering, explain why one of the other choices does not fit.
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Choose a question that surprised you. Explain the answer in your own words and open its source link if you want to explore further. You can try again; the score reflects this short quiz, not your mastery of the whole category.
Keep exploring: Earth, Space & Environment or Health & Human Body.
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