Questions: Density: Heavy for Its Size

Question 1

A block of wood and a block of iron are the same size. The iron block is much heavier. Which is denser?

• A. The wood block
• B. They have the same density
• C. The iron block
• D. You cannot tell from this information

Answer: (C)

Density is mass divided by volume. Since both blocks are the same size (same volume) but the iron has more mass, the iron is denser.

Question 2

A large object is typically denser than a small object.

• T. True
• F. False

Answer: False

Density depends on how much mass is packed into a given volume, not on overall size. A small pebble can be denser than a large balloon.

Question 3

How do you calculate the density of an object?

Model answer: Divide the object's mass by its volume (density = mass ÷ volume).

Density measures how tightly matter is packed. You need to know both how much stuff is there (mass) and how much space it takes up (volume).