Available Answers

1. 1.

   Fill in the blanks.

   1. When ____________ is applied on an object and it moves, work is done.
   2. Light travels in a ____________ path.
   3. It is important to keep ourselves clear and maintain personal _____________.
   4. The ability to do work is called ____________.
2. 2.

   Write T for the true and F for the false statements.

   1. Translucent objects do not allow light to pass through them.
   2. A pulley is an example of a simple machine.
   3. Biodegradable wastes do not decompose.
   4. Any object which is in motion possesses kinetic energy.
3. 3.

   What is organic waste?
4. 4.

   Write a short note on Class 1 lever.
5. 5.

   How is rotation different from revolution? Write any two differences.
6. 6.

   What is potential energy? Explain with the help of an example.