Using air from mouth in Air, Winds And Cyclones – Class 7 Science Experiment

Chapter Name: Air, Winds And Cyclones

Activity Name: Using air from mouth in Air, Winds And Cyclones

Activity Description:

Using air from mouth in Air, Winds And Cyclones - Class 7 Science Experiment
Using air from mouth in Air, Winds And Cyclones - Class 7 Science Experiment

This activity involves two experiments related to the behavior of air and its pressure. In the first experiment, a glass containing water is used with two straws placed inside it. One straw is submerged in the water, and the other is placed horizontally.

When air is blown through the horizontal straw, the water inside the glass reacts in a certain way. The second experiment involves placing a cotton ball just inside the mouth of an empty bottle and attempting to blow air to make the ball enter the bottle.

This activity can be performed with bottles of different sizes to observe the results.

Required Items:

  1. Glass containing water
  2. Two straws
  3. Empty bottle(s)
  4. Cotton ball(s)

Step by Step Procedure:

Experiment 1:

  1. Fill a glass with water.
  2. Insert one straw vertically into the water, ensuring it is submerged.
  3. Place the other straw horizontally just above the water’s surface.
  4. Blow through the horizontal straw and observe what happens to the water.

Experiment 2:

  1. Take an empty bottle and place it on a table.
  2. Put a cotton ball just inside the mouth of the bottle.
  3. Attempt to blow air onto the cotton ball and make it enter the bottle.
  4. Try the same activity with bottles of different sizes.

Experiment Observations:

Experiment 1:

  • The water in the glass may splash or move when air is blown through the horizontal straw.

Experiment 2:

  • The cotton ball may enter the bottle when air is blown onto it.


  1. Take care while blowing through the straws to avoid any splashing or spills.
  2. Ensure the cotton ball is placed safely, and do not blow with excessive force.

Lesson Learnt from Experiment:

The activity demonstrates the principles of air pressure and its effects on liquids. Blowing through the horizontal straw creates low pressure inside the straw, causing water to rise inside it due to higher pressure in the glass.

Similarly, blowing air onto the cotton ball reduces the pressure above it, allowing it to be pushed into the bottle by the higher pressure outside.

Science Experiment Kits for Kids

Photo Title Price Buy
Einstein Box Junior...image Einstein Box Junior Science Gift Set | 2-in-1 Set of My First Science Kit & Slime Kit for 4-6-8 Year Olds| Birthday Gift for Boys & Girls ₹1,199.00
ButterflyEdufields 20+ Science...image ButterflyEdufields 20+ Science Kit For Kids | STEM Projects birthday gift For Boys and Girls Ages 7-8-10-12 |DIY Educational & Learning Experiment Toys for 7 To 12 Year Olds | Build 20+ Motor Machines ₹1,699.00
The Little Ones...image The Little Ones Science Kit - Science experiment kit for kids 6-8-10-12 years old,educational learning toys,Best gift for boys&girls,chemistry kit,science project[Complete science kit- 100+experiment]
WitBlox AI Artificial...image WitBlox AI Artificial Intelligence Robotic Science Kit for 101+ Project 137 Part 8 Yrs+, Interlocking Bricks, Electronic Sensor & Circuits to create Logic 2 Free Live Classes Gift Toy for Boys & Girls ₹3,699.00
Avishkaar Robotics Advanced...image Avishkaar Robotics Advanced Kit|150-In-1 DIY Stem Metal Kit|Multicolor|150+ Parts|Learn Robotics|Coding & Mechanical Design|for Kids Aged 10-14|Made in India|Educational DIY Stem Kit|Made in India ₹10,399.00
My Science Lab...image My Science Lab Ultimate Science Experiment Kit for Kids Age 6-14 | STEM Toys | Physics Kit Set | Science & Fun 5-in-1 Projects | School Science Kit | Best Educational Birthday Gift Toys for Boys and Girls ₹1,199.00

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *