---
title: "NCERT Solutions for Class 6 Science Chapter 6 Exercise 6.7"
url: https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions/exercise-6-7
dateModified: 2026-10-07T16:01:29+00:00
---

# NCERT Solutions for Class 6 Science Chapter 6 Exercise 6.7

Chapter 6: Materials Around Us. Every question from Exercise 6.7, with full working and the final answer.

Free PDF (15 pages): https://www.swavid.com/api/seo/pdf/ncert/science/class-6/swavid-ncert-solutions-class-6-science-chapter-6-materials-around-us-5a47167364.pdf

## Activity 6.7: Let us explore

### Question 1

*Activity*

Collect small amounts of sugar, salt, chalk powder, sand and sawdust.

**Solution**

1. This is an activity step to collect small amounts of common materials like sugar, salt, chalk powder, sand, and sawdust for testing solubility in water.

**Answer:** Materials are collected for testing.

### Question 2

*Activity*

Take five glass tumblers and fill them about two-third with water.

**Solution**

1. This activity step sets up the experiment by taking five glass tumblers and filling them about two-third with water.

**Answer:** Five glass tumblers are filled two-third with water.

### Question 3

*Activity*

Put a teaspoonful of sugar in the first glass tumbler, salt in the second one, chalk powder in the third, sand in the fourth and sawdust in the fifth glass tumbler.

**Solution**

1. This activity step involves adding a teaspoonful of each specific material into the respective glass tumblers containing water.

**Answer:** Sugar, salt, chalk powder, sand, and sawdust are added to separate tumblers.

### Question 4

*Activity*

On stirring, predict what will happen in each case.

**Solution**

1. This activity step requires predicting whether sugar, salt, chalk powder, sand, and sawdust will disappear or remain unchanged in water before stirring.

**Answer:** Predictions are made for each material regarding whether it will disappear in water.

### Question 5

*Activity*

Use a spoon to stir well the contents of each glass tumbler.

**Solution**

1. This activity step uses a spoon to stir the contents of each glass tumbler thoroughly to mix the materials with water.

**Answer:** Contents of each glass tumbler are stirred well using a spoon.

### Question 6

*Activity*

Wait for a few minutes and watch what happens.

**Solution**

1. Sugar and salt dissolve completely in water and disappear.
2. Chalk powder, sand and sawdust do not dissolve in water and remain insoluble.

**Answer:** Sugar and salt dissolve in water, while chalk powder, sand and sawdust do not dissolve.

### Question 7

*Activity*

Write down your observations in Table 6.5.

**Solution**

1. Sugar and salt completely disappear in water because they are soluble.
2. Chalk powder, sand and sawdust do not disappear in water even after stirring because they are insoluble.

**Answer:** Sugar and salt dissolve in water, while chalk powder, sand and sawdust remain insoluble and do not disappear.

> Common mistake: Confusing insoluble substances like chalk powder or sand with substances that dissolve like sugar.

## Related pages

- [All Chapter 6 NCERT solutions](https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions)
- [Exercise 6.1](https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions/exercise-6-1)
- [Exercise 6.2](https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions/exercise-6-2)
- [Exercise 6.3](https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions/exercise-6-3)
- [Exercise 6.4](https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions/exercise-6-4)
- [Exercise 6.5](https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions/exercise-6-5)
- [Exercise 6.6](https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions/exercise-6-6)
- [Exercise 6.8](https://www.swavid.com/science/class/6/chapter/materials-around-us/ncert-solutions/exercise-6-8)

Solutions written by SwaVid, a personal AI tutor for Class 6 to 10 Maths and Science. Practise this chapter free: https://www.swavid.com/start/student