Cell Structure and Functions — Science STD 8 — Question

Fill in the following blanks with suitable words: The process of ______________ ensure continuity of life on earth.

Why should we not put a pin or pencil in our ears?

What is the SI unit of force?

Write True and False against the following statements and also correct the false statement.Middle zone is the hottest zone of a flame.

Name two methods of irrigation with conserve water.

Paheli wants to understand why porters place a round piece of cloth on their heads when they carry heavy loads ?

Name the scientist who observed a thin slice of cork through a microscope and coined the team ‘cell’.

What is a thunderstorm?

Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?

Name two non-metals which are used in fireworks (crackers, etc.)