Question

1. Explain the Rutherford's model of an atom with a neat diagram.
2. Compare the limitations of JJ. Thomposon's model of atom and
Rutherford's model of atom.
3. Differentiate between isotopes and isobars.
4. What is the law of conservation of energy? An object of mass 40 kg is raised
to a height of 5 m above the ground. What is its potential energy? If the
object is allowed to fall, find its kinetic energy when it is half-way down.
5. Describe an activity to show sound requires a medium for propogation
6. Explain nitrogen cycle with a neat flow chart.
7. Explain an activity to show plants prevent soil erosion.
8. Write a note on how forest influence the quality of air, soil and water
resources
9. Explain ozone layer depletion.
10. What is green house effect? How can we prevent global warming?​

Answer 1

Answer:

1. Rutherford model also know n as goldfoil experiment which shows the deflated alpha Ray's when passed through a gold foil .and the position of elctrons in it

3. atoms of same elements haVing same atomic number but different mass number is called isotopes.

atoms of different elements having different atomic number but same mass number is called isobar.

4 . mass can neither be created nor destroyed but can be changed from one form to another.