Wastewater Story — Science STD 7 — Question

A fuse is connected with a live wire or with neutral wire?

Mark the following statements as True or False. If false, write the correct statements. All heterotrophs have a similar basic process of nutrition.

State the consequence when one food chain is disturbed in an ecosystem.

Mention the name of lens which can converge the sun's rays to a point and burn a hole in the piece of paper.

State the factors on which the time period of a simple pendulum depends.

State uses of concave mirror.

Do you think that one possibility could be using a turmeric solution for the spraying liquid and a soap solution for writing on the paper?

How many mirrors are used in a Kaleidoscope?

Fill in the blanks:
An image formed by a concave ___________ cannot be obtained on a screen.

Define ignition temperature.