Class 9th Science Session 2022-23 Class 9 Science Terminal Exams MCQ Solutions 9th Science Terminal Exam Based MCQ Extra Questions Class IX Science MCQ Extra Questions Answers

Fuel is burned in the rocket and the exhaust gases are made to escape in a downward direction through a narrow nozzle. As a response, the rocket accelerates upward.

Mass of rocket is greater than mass of gases as the rocket is used for carrying a satellite etc. to a suitable height above the ground.

The first cell was observed in cork slice. Robert Hooke in 1665, observed the cells in a cork slice with the help of a primitive microscope.

Farmers typically use techniques such as hand picking, breaking and sifting to purify the grain.