K K Gupta and Stalin Malhotra Solutions for Chapter: Sorting Materials into Groups, Exercise 9: Brain Teaser
K K Gupta Science Solutions for Exercise - K K Gupta and Stalin Malhotra Solutions for Chapter: Sorting Materials into Groups, Exercise 9: Brain Teaser
Attempt the free practice questions on Chapter 4: Sorting Materials into Groups, Exercise 9: Brain Teaser with hints and solutions to strengthen your understanding. Frank Experience Science solutions are prepared by Experienced Embibe Experts.
Questions from K K Gupta and Stalin Malhotra Solutions for Chapter: Sorting Materials into Groups, Exercise 9: Brain Teaser with Hints & Solutions
Aim: To test for floatation of substances in water
Materials required: a beaker half-filled with water, an iron nail, a dry leaf, a cork, a coin, a plastic ruler, a small stone, an ice cube
Procedure: Collect different materials such as an iron nail, a dry leaf, a cork, a coin and a plastic ruler. Take a beaker half-filled with water. Now drop the objects into the beaker one by one.
Observation: What do you find? Record your observations in the table given below.
| S. No. | Materials | Floats on water | Sinks in water |
| 1. | an iron nail | ||
| 2. | a dry leaf | ||
| 3. | a cork | ||
| 4. | a coin | ||
| 5. | a plastic ruler |
Conclusion: We observe that some materials float on water, while others sink in it.
In a dark room, cover the glass of the torch using your palm. Switch on the torch. Now observe the other side of the palm. Is your palm transparent or translucent? Discuss in class.
