Understanding Displacement and Water Conservation

What happens to the water level when a pebble is added to a cylinder filled with water?

• The water evaporates.

• The water level increases.

• The water level remains the same.

• The water level decreases.

Why does the water level rise when a pebble is added to the cylinder?

• The pebble absorbs water.

• The pebble adds more water.

• The pebble displaces water.

• The pebble dissolves in water.

In the experiment, how much does the water level increase with each pebble added?

• 25 units

• 20 units

• 15 units

• 10 units

How can adding pebbles to a water tank help conserve water?

• By increasing the water capacity of the tank.

• By reducing the amount of water needed to fill the tank.

• By making the water evaporate faster.

• By filtering the water.

What is the main principle behind using pebbles to conserve water in a tank?

• Pebbles increase the water's temperature.

• Pebbles purify the water.

• Pebbles reduce the tank's volume.

• Pebbles displace water, reducing the amount needed to fill the tank.