Combustion and Flame — Science STD 8 — Question

What happens when the two forces act in the opposite direction on an object?

Name the process of separating the various useful constituents of petroleum.

Boojho has seen fountains of water coming out of the leaking joints or holes in pipes supplying water. Is it due the pressure exerted by water on the walls of the pipes ?

If a charged plastic straw is brought near another uncharged plastic straw, what will happen?

Does the application of a force would always result in a change in the state of motion of the object ?

What determines the different states of matter?

Name an antibiotic extracted from fungus (mould). Name the fungus.

Fill in the blanks with suitable words. Time taken by an object to complete one oscillation is called _________.

Write True/ False against the following statement. Wildlife is an exhaustible natural resource.

Mention the size of an ostrich egg. Is it a single cell of a group of cells?