Have a query? Let us call you for FREE
X+91
E.g : 9884012345, 01123456789
Office hours: 9:00 am to 9:00 pm IST (7 days a week)
What are the different kinds of vehicles that you can see?
What do you think they need as fuel?
Which of the vehicles do you think give off smoke? Put a red mark on those.
Solution:
Disclaimer: This section aims to enhance the students’ imagination and observation skills. Considering the sustenance of this process, the answer to the questions has not been provided.
How do you come to school?
How do your family members go to work from home?
What problems can we have from smoke coming out of vehicles?
Solution:
Disclaimer: This question has to be answered by the students based upon their own experience. Hence, the same can vary from one student to another. Considering this, the answer to the question has not been provided.
Disclaimer: This question has to be answered by the students based upon their own experience. Hence, the same can vary from one student to another. Considering this, the answer to the question has not been provided.
The smoke coming out from the vehicles can cause pollution of air. This polluted air can cause respiratory disorders in animals and human beings. The harmful substances present in smoke can also make rain water impure.
Besides oil, what else is found deep inside the earth?
Solution:
Besides oil, metals such as gold, silver, copper are found deep inside the earth.
What kinds of problems will we face, if the number of vehicles keeps on increasing? For example, more traffic on the road. Talk to your elders and write about it.
Manju said, “Why doesn't everyone use a bus?” What do you think, why don’t people travel by buses?
Suggest some ways to deal with the problems arising out of the growing number of vehicles.
Solution:
If the number of vehicles keeps on increasing we would not get space to move on the road. There would be more traffic jam on the road and everyone would run late for work. There would be more smoke coming out of the vehicles and then we would suffer from more breathing problems. There would be noise pollution all around.
Disclaimer: This question has to be answered by a student based upon his own thinking and imagination. Hence, the same can vary from one student to another.
People do not travel by buses for their own convenience. People love to travel in their own vehicles to save their time.
Some ways to deal with the problems arising out of the growing number of vehicles are:
(i) We should avoid using private vehicles for traveling. Rather we should try to travel by bus.
(ii) If possible, we can live near our working place to reduce the need of moving out in vehicles.
How much oil? |
Scooter |
Car |
Tractor |
How much petrol/diesel can be filled at a time? |
|
|
|
How far can it go on one litre of petrol/diesel? |
|
|
|
The rates of petrol are different in each city. The rates of petrol and diesel in Chennai are given here. Look at the table and answer the questions.
Oil |
Rate of one litre in 2002 |
Rate of in one litre 2007 |
Petrol |
Rs 28 |
Rs 47 |
Diesel |
Rs 18 |
Rs 33 |
Solution:
Where is diesel used? Find out.
Solution:
(i) For dry cleaning
(ii) For lighting
(iii) As petrol, diesel or aeroplane fuel
(iv) As kerosene and LPG
(v) To run machines
(vi) For making plastic and paints
Diesel is used as fuel in vehicles such as cars, tractors, buses and trucks. It is also used in generators for electricity generation.
Suggest some ways to save oil.
Solution:
Some ways to save oil are:
(i) Using public transport such as buses and trains instead of private vehicles such as cars and bikes
(ii) Switching off the engines when we stop your vehicles at traffic signals
(iii) Using some other alternatives of energy such as sunlight (solar energy) that would last longer
Have you ever collected dry wood or made cow dung cakes? How are they made?
Do you know anyone who collects dry wood or leaves to be used for lighting a chulha?
Who cooks food in your family? What about other families in your area?
If they cook food using wood or upla (cow dung cakes), what difficulties do they face due to smoke?
Can Durga use anything else instead of wood? Why not?
Solution:
Disclaimer: This section comprises of questions which calls for the process of one’s own observation and gathering information. Considering the sustenance of this process, the answer for the same has not been provided.
Which was the fuel used the least in 1976?
In 1976, LPG and kerosene were used in ______ houses and in 1996 this increased to______. This means that in twenty years their use increased by________%.
Out of 100 how many houses were using electricity in 1996?
Which fuel was used the least in 1996? What percentage of houses used it in the year 1976?
Solution:
Electricity as a fuel was used the least in 1976.
In 1976, LPG and kerosene were used in 10 houses and in 1996 this increased to 18 . This means that in twenty years their use increased by 80 %.
Hint: Increase in LPG and kerosene usage in twenty years = (18 – 10/ 10) × 100
Out of 100, 5 houses were using electricity in 1996.
Coal was used the least in 1996. 5% of houses used it in the year 1976.
Hint: Percentage of houses using coal in 1976 = 5/ 100 × 100
When they were young what was then used to cook food at home?
In the past 10 years use of which cooking fuel has increased in your area? Use of which fuel has decreased?
Guess the use of which fuel would increase and which would decrease in the next 10 years.
Solution:
Disclaimer: This section aims at increasing the creativity of the students. Hence, the students are advised to do this section themselves.
old people __________________
children __________________
those who cannot see? __________________
Solution:
Disclaimer: This section aims at increasing the creativity of the students. Hence, the students are advised to do this section themselves.
Disclaimer: This section comprises of questions which calls for the process of one’s own observation and gathering information. Considering the sustenance of this process, the answer for the same has not been provided.
Disclaimer: This section aims at increasing the creativity of the students. Hence, the students are advised to do this section themselves.