In ancient times, people used to determine directions during the night with the help of __________.
During the lunar eclipse which body is shadowed?
Which of the following rocks is made of mineral calcite?
An active volcano gives out __________.
Which of the following is/are fossil fuels?
Using clean fuel helps in preventing_________.
Forest is the source of __________.
Wastage of paper will affect_________.
How can you shift a table from one room to the another room?