6.6 Density

A smaller object can be denser than a larger object

• True

• False

Whether an object floats on a liquid depends only on the material making the object.

• True

• False

The density of a substance decreases when heated.

• True

• False

When a piece of wood is cut into halves, the density of each piece...

• is half of the original piece

• is the same as the original piece

• is double of the original piece

• is four times of the original piece

Boat A floats on water, but boat B sinks. The boats are made of different materials. Which statement(s) must be correct?

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only

Three liquid samples are put into a cylinder. Arrange the samples in the order of its position. The top one is first.

• P > Q > R

• Q > P > R

• R > P > Q

• R > Q > P

Compare 50 cm³ of hot water and 50 cm³ of cold water. Which statement(s) are correct?

• (1) only

• (3) only

• (1) and (2) only

• (2) and (3) only

Why can people float on the Dead Sea?

• We are lighter than water

• We are heavier than water

• We are denser than water

• We are less dense than water

If we want to sink in the Dead Sea, we should...

• Gain weight and get fatter

• Remove all the salt from the Dead Sea

• Add sugar to the Dead Sea

• Start swimming in the Dead Sea

What will happen to bulbs in a Galileo Thermometer when they are cooled?

• They sink

• They rise

• They change colour

• They spin around