Density and Archimedes' Principle

IGS Ph Density Intro

Multiple Choice

The upper sea layer is 1022 kg/m³.

The lower sea layer is 1028 kg/m³ .

Choose a value for the density of the submarine.

• 1020 kg/m³

• 1025 kg/m³

• 1030 kg/m³

Multiple Choice

Which is most dense, the brick or the balloon?

• Brick

• Balloon

Multiple Select

Why is a balloon less dense than a brick?

Choose two.

• A brick would sink in water and a balloon would float.

• On average, the spaces between the atoms in a balloon are much bigger.

• On average, there are more atoms in each unit of volume in a brick.

• Bricks are harder and tougher than balloon plastic.

Multiple Choice

At a higher temperature the air molecules move ...

• faster

• slower

• more randomly

Multiple Select

The molecules in the hotter gas move faster so when they hit the walls of the balloon they push on it with .................. and make the balloon ................... slightly.

• more force.

• less force

• contract

• expand

Multiple Choice

When the balloon expands, it makes the average density of the balloon ....

• increase

• decrease

• double

Fill in the Blanks

The balloon will float when its average density becomes less than the

.

(Enter ONE WORD, no full stop.)