Mini-Quiz: Factors Affecting Density of Matter

1. If Uranium atoms have greater mass than Gold atoms, why does Gold have a greater density?

   Gold is more expensive than Uranium and thus is more denseSorry, not correct. Try another button. There are more Gold atoms in a given volume than there are Uranium atomsThat's correct. You know about density. Uranium actually has a greater density than GoldGood try, but not right. Select another answer.

2. Why is the density of air in a balloon greater than the density of air outside the balloon?

   Because it is under pressure and compressedCorrect answer. You are close to being a genius. The density of air is the same everywhereSorry, not correct. Try another button. Because it is made up of HeliumOops! Wrong answer. Re-read the question and try again.

3. What happens to the density of a piece of iron when it is melted?

   The density increases because the iron atoms get heavier with heatOops! Wrong answer. Re-read the question and try again. The density remains the same because heat does not affect ironGood try, but not right. Select another answer. The density decreases when the iron changes its stateThat's correct. You know about density.

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