Gurushala

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chem...

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4 year ago

Climate change is the long-term alteration of temperature and typical weather patterns in a place. ... The cause of current climate change is largely human activity, like burnin...

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4 year ago

The Nobel Prize for chemistry has been awarded to German scientist Benjamin List of the Max Planck Institute and Scotland-born scientist David WC MacMillan of Princeton Universi...

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4 year ago

greenhouse gases are carbondioxide , methane, ozone, nitrous oxide and some artificial chemicals like chlorofluorocarbons.

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4 year ago

sulphur dioxide, nitrogen dioxide, carbon monooxide and increased concentration of CO2 can also be harmful.

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4 year ago

. What is meant by power of accommodation of the eye?

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4 year ago

A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?

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4 year ago

Why does the sky appear dark instead of blue to an astronaut?

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4 year ago

Why does the Sun appear reddish early in the morning?

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