Electricity: Circuits and their Components — Science STD 7 — Question

List two reasons that can cause floods.

Place the following statements in a proper order to form a meaningful paragraph:

1. Which inturn decreases the seepage of rainwater into the ground.
2. This decreases the open areas like parks and playgrounds.
3. Increasing population create demand for construction of houses, shops, offices, roads and pavements.
4. This results in depletion of water table and creates scarcity of more water.

In Fig, how many hours of sunlight do the North Pole and the South Pole receive during one rotation of the Earth?

Place a piece of bread in a moist and warm place for few days. Observe it after few days. What will you see?
(i) Name the organism that grows on the bread piece?
(ii) What are the thread-like projections called?
(iii) What is the knob-like structure present on the top of thin stem called?
(iv) Which type of reproduction does this organism show?

Indicate the type of climate of the following areas:

Draw a diagram to show the radiation by the sun.

Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them. Shearing, __________, sorting, __________, __________, _________.

Explain with the help of a diagram, how does the magnetic effect of electric current help in the working of an electric bell.

Distinguish between the following.
Exothermic reaction and Endothermic reaction.