Fill in the blanks.
(a) A place where animals are protected in their natural habitat is
called .
(b) Species found only in a particular area is known as .
(c) Migratory birds fly to far away places because of changes.
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?
In an experiment 4.5 kg of a fuel was completely burnt. The heat produced
was measured to be 180,000 kJ. Calculate the calorific value of the fuel.
Which zone of a flame does a goldsmith use for melting gold and silver
and why?
It is difficult to burn a heap of green leaves but dry leaves catch fire easily.
Explain.
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