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

Where is water absorbed in the digestive system?

Name the two types of blood vessels.

Name the source from which litmus solution is obtained. What is the use of this solution?

What name is given to those substances which do not change the colour of either red or blue litmus paper?

Why some plant leaves appear red, violet or brown?

Define zygote.

Name some components of food.

What do you mean by average speed?

Trisha has seen huge garbage dumps outside the school campus which are not being regularly disposed off by municipality of the area. She discussed the problem with her biology teacher and decided to organise a rally to spread awareness among local people. Next day she delivered this information in the assembly and convinced the school mates to join her. She also explained them about the importance of sanitation at public places which she had recently studied in biology.
(i) In your views, who is responsible to maintain sanitation at public places?
(ii) What would happen, if all the wastes produced at public places are not disposed off regularly?

What type of image is formed on a cinema screen?