Water Properties and Experiments

The video tutorial explores the properties of water, focusing on adhesion and cohesion. It includes a hands-on experiment where water is dropped onto dry and wet pennies to observe these properties. The tutorial guides students through setting up the experiment, making predictions, and analyzing results. The dry penny holds more water drops due to cohesion and adhesion, while the wet penny demonstrates cohesion. The video concludes with a reflection on the experiment's outcomes.

What percentage of the Earth's surface is covered by water?

• 60%

• 50%

• 70%

• 80%

What does adhesion refer to in the context of water properties?

• Water sticking to itself

• Water evaporating quickly

• Water sticking to other substances

• Water freezing at high temperatures

What is the main purpose of forming a hypothesis before starting an experiment?

• To ensure the experiment is safe

• To avoid any errors during the experiment

• To predict the outcome of the experiment

• To make the experiment more fun

During the experiment, what happens to water drops on a dry penny?

• They spread out evenly

• They evaporate quickly

• They form a large droplet

• They change color

How many drops of water did the dry penny hold before spilling?

• 15

• 20

• 25

• 30

What is an example of cohesion observed in the experiment?

• Water drops forming a large droplet

• Water drops sticking to the penny

• Water drops evaporating

• Water drops changing color

How many drops of water did the wet penny hold before spilling?

• 18

• 21

• 24

• 27

What is the main difference observed between the dry and wet penny experiments?

• The wet penny held more drops

• The dry penny held more drops

• Both pennies held the same number of drops

• The wet penny changed color

What property of water is demonstrated when water drops stick to the water already on the penny?

• Adhesion

• Evaporation

• Cohesion

• Condensation

What is the significance of the Water Drop Experiment in understanding water properties?

• It reveals water's freezing point

• It shows how water evaporates

• It demonstrates adhesion and cohesion

• It explains water's boiling point