Interactive Graded Test on Matter

This is an interactive test that will automatically check your answers and calculate your grade.

Based on these lessons

This test has 25 questions and is based on material from the Matter section of lessons:

• Theories of Matter
• The Atom
• Sub-Atomic Particles
• Are Atoms Tiny Solar Systems?
• States of Matter
• Changing States of Matter
• Pressure and States of Matter
• When Water Becomes Snow
• Dry Ice
• Density

It is a good idea to study these lessons before taking this graded test.

QUIZ

Self-check your understanding

1. What is the Molecular Theory of Matter?

   Molecules are made of tiny matter in motionGood try, but not right. Select another answer.Matter is made of tiny molecules in motionThat is correct.Molecules don't matterSorry, not correct. Try another button.

2. What are some new sub-atomic particles?

   The quark and gluonThat is correct.Matter and anti-matterGood try, but not right. Select another answer.Molecules and atomsSorry, not correct. Try another button.

3. What are some newer models of the atom?

   Electron cloud and String theoryThat is correct.Quantum and Uncertainty theoriesGood try, but not right. Select another answer.Bohr's Solar system modelSorry, not correct. Try another button.

4. If the Carbon nucleus has 6 protons, how many neutrons would it most likely have?

   Carbon has no neutronsGood try, but not right. Select another answer.2 neutronsSorry, not correct. Try another button.6 or more neutronsThat is correct.

5. How were sub-atomic particles discovered?

   They are a result of experiments with atomic acceleratorsThat is correct.Experiments with very powerful microscopes helped the discoveriesGood try, but not right. Select another answer.Scientists made some lucky guessesSorry, not correct. Try another button.

6. Why is a neutrino so difficult to detect?

   It travels at velocities faster than the speed of lightGood try, but not right. Select another answer.It has no electrical charge, so it does not affect nearby particlesThat is correct.It doesn't really existSorry, not correct. Try another button.

7. How can a Quark have a fraction of a charge?

   A Quark is only a fraction of a particleGood try, but not right. Select another answer.Because Quarks are so difficult to detect in natureSorry, not correct. Try another button.The electrical charge of (+1) was defined before the Quark was discoveredThat is correct.

8. If our solar system were an atom, how would electricity be represented?

   Electricity only goes through wiresGood try, but not right. Select another answer.Perhaps an electron doesn't really existSorry, not correct. Try another button.Perhaps a comet would be like a moving electronThat is correct.

9. Why won't a gas stay in a cup?

   The gas will stay if you hold the cup upside-downGood try, but not right. Select another answer.A gas's molecules have too much energy to stay confinedThat is correct.You can't put a gas in a cupSorry, not correct. Try another button.

10. Can copper ever be a liquid?

    Copper is only used in making coinsGood try, but not right. Select another answer.Copper is a metal and can't be a liquidSorry, not correct. Try another button.Yes, it can be melted at high temperaturesThat is correct.

11. What is a possible reason that iron is a solid, while H2O is a liquid at room temperature?

    Iron atoms are harder than water moleculesGood try, but not right. Select another answer.Iron atoms have greater mass than water molecules and thus require more energy to go to the liquid stateThat is correct.Adding water to iron changes it to the rust state of matterSorry, not correct. Try another button.

12. When is condensation seen outside?

    When moist air condenses into rainThat is correct.Condensation can only occur insideGood try, but not right. Select another answer.When water becomes a solidSorry, not correct. Try another button.

13. Why doesn't the temperature of a material keep rising when reaching the melting point?

    The melting point is the highest temperature possibleGood try, but not right. Select another answer.Energy is required to change the state from solid to liquidThat is correct.Energy is given off when the material meltsSorry, not correct. Try another button.

14. Why isn't a mercury thermometer good to use near the North Pole?

    Mercury is too magnetic to use near the North PoleGood try, but not right. Select another answer.Mercury is too expensive to use in a thermometerSorry, not correct. Try another button.The mercury may freeze at very cold temperatures near the North PoleThat is correct.

15. Why does water boil at a lower temperature on a mountaintop?

    It is hotter when you are closer to the SunGood try, but not right. Select another answer.There is less pressure to contain the water moleculesThat is correct.You can't boil water on a mountaintopSorry, not correct. Try another button.

16. What can happen when the pressure of a material is less than that of its Triple Point?

    It can go directly from a solid to a gasThat is correct.It always goes directly from a solid to a liquidGood try, but not right. Select another answer.It can be in three states at one timeSorry, not correct. Try another button.

17. Why does water expand when it turns to ice?

    All materials expand when cooledGood try, but not right. Select another answer.The crystalline structure of ice causes it to expandThat is correct.Water cannot be compressedSorry, not correct. Try another button.

18. At what temperature does water change from a liquid to a solid??

    At 0 degrees CelsiusThat is correct.At 32 degrees CelsiusGood try, but not right. Select another answer.Whenever it snowsSorry, not correct. Try another button.

19. What are snowflakes before they freeze?

    CloudsGood try, but not right. Select another answer.Water dropletsThat is correct.Ice crystalsSorry, not correct. Try another button.

20. Why does temperature affect the shape of snowflakes?

    The rate at which they freeze affects how the crystals are formedThat is correct.It only affects how heavy the snow isGood try, but not right. Select another answer.Cold temperatures cause snowflakes to shrivel upSorry, not correct. Try another button.

21. Why is frozen carbon dioxide called dry ice?

    Because of its extremely low temperatureGood try, but not right. Select another answer.Because it looks like ice but does not turn into a liquid when it meltsThat is correct.To avoid confusion with wet iceSorry, not correct. Try another button.

22. How could you turn dry ice into a liquid?

    You can't, because it is dryGood try, but not right. Select another answer.By putting it under high pressureThat is correct.By dropping it in a bucket of waterSorry, not correct. Try another button.

23. Why is the density of water equal to 1?

    It just happened to equal 1Good try, but not right. Select another answer.Because there is more water than other materialsSorry, not correct. Try another button.The size of the units were defined so that water density would equal 1That is correct.

24. Which is heavier: a pound of steel or a pound of coffee?

    Steel is always heavier than coffeeGood try, but not right. Select another answer.They both weigh a poundThat is correct.Sometimes freeze-dried coffee is heavierSorry, not correct. Try another button.

25. Why is the density of lead the same on the Moon as it is on Earth?

    Density relates to the mass, not the weightThat is correct.Lead will melt on the MoonGood try, but not right. Select another answer.The Moon has less gravity than the EarthSorry, not correct. Try another button.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.

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Matter matters

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