Chemical Effects of Electric Current — Science STD 8 — Question

Does any part of our body vibrate when we speak? Name the part.

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

One student says that water exerts pressure on the bottom of the bucket but another student says that water exerts pressure on the sides of the bucket. What would you like to say?

In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case. An athlete making a high jump to clear the bar at a certain height.

Name one good habit to maintain hygiene.

Name the gland which secretes insulin hormone.

Boojho wonder if there is a record of the endangered species.

Which force makes a rolling ball stop on its own?

Where would sound travel faster-in wood or in water?

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 ?