Bouncing Eggs

The video tutorial explores an experiment to remove eggshells without cracking them using vinegar. It explains the chemical reaction between vinegar and calcium carbonate in the eggshell, resulting in the shell's dissolution. The experiment demonstrates osmosis, where water moves into the egg, causing it to swell. The video also introduces the concept of osmotic power, a renewable energy source using osmosis to generate pressure and turn turbines.

What materials are needed to remove an eggshell without cracking it?

• Chicken eggs, water, nail polish, and a torch

• Chicken eggs, vinegar, nail polish, and a torch

• Chicken eggs, vinegar, glue, and a torch

• Chicken eggs, water, glue, and a torch

What is the purpose of coating part of the eggshell with nail polish?

• To make the egg more durable

• To prevent the egg from floating

• To protect part of the shell from dissolving

• To make the egg more colorful

What is the main component of eggshells that reacts with vinegar?

• Calcium carbonate

• Sodium chloride

• Magnesium sulfate

• Potassium nitrate

What is the process called when water moves through a semi-permeable membrane to equalize concentration?

• Diffusion

• Filtration

• Osmosis

• Evaporation

Why does the egg swell in size after being submerged in vinegar?

• The egg absorbs water produced by the reaction

• The egg absorbs air

• The egg absorbs calcium

• The egg absorbs vinegar

How does the osmotic power model generate energy?

• By using wind to turn a turbine

• By using sunlight to heat water

• By using pressure from osmosis to turn a turbine

• By using chemical reactions to produce electricity

Why is research into osmotic power considered beneficial?

• It is renewable and emission-free

• It is only suitable for small-scale applications

• It is expensive and complex

• It requires rare materials