Adolescence: A Stage of Growth and Change — Science STD 7 — Question

The coldest region on the earth is the:

Iodine used to detect presence of starch. It gives starch:

What are the effects of deforestation?

Why is metal used for cooking utensils?

This method does not result in conservation of water:

A student wants to measure the speed of a ball rolling down a ramp. He found a few instruments which are listed in the lists.
(i) Hourglass
(ii) Thermometer
(iii) Measuring tape
(iv) Stopwatch
(v) Balance scale
Which of these are required to measure the speed of the ball?

Which among the following forest animals is the smallest?

What is likely to happen if high speed winds blew over a building with a weak roof?

A cable manufacturing unit tested few elements on the basis of their physical properties.

Properties	W	X	Y	Z
Malleable	Yes	No	No	Yes
Ductile	Yes	No	No	Yes
Electrical Conductivity	Yes	Yes	Yes	No
Melting Point	High	Low	Low	High

Which of the above elements were discarded for usage by the company?