Question

1. on which factor does the colour of scattered white light depend?

2. mention the position of isotopes in the modern periodic table

3. choose one consumer each that belongs to the second and third trophic levels from the organisms given below:

eagle, frog, tiger, rabbit, fox

4. write the formula of the compound formed by silicon and chlorine.

5. describe the various parts of a seed.

6. 4 disadvantages of burning fossil fuels

Answer 1

1. The colours of scattered white light depend on the varying wavelength of the different coloured lights.
2. Isotopes are placed in a single slot due to their similar chemical properties. 6. a. Release of harmful gases causing air pollution. b. Depletion of fossil fuels which take millions of year to form. c. Acid rain. d. Greenhouse effect