Question

how will you separate sand and water from the mixture?

why does a lump of cotton shrink in water?

how do plants and animals help each other in the exchange of gases in the atmosphere ?

why do mountaineers ,se drivers and astronauts carry oxygen cylinder with them?

how are the eyes placed in the face of lion and deer?

some trees have needle shaped leaves why?

factory have long Chimneys. why?

how does a fish move which part of its help it to breathe underwater?

differentiate between Luminous and non luminous object with examples for each ?

write three properties of light,?

if current does not flow through a circuit what does be the possible reason?

Answer 1

sand& water can be separated by filtration technique..
2) lump of cotton shrink coz the water get pumped in it..