Science assignment (Class 8)

 

1.     Define cell. Who discovered the cell?

2.     What is the difference between atoms and molecules?

3.     Name the process by which liquid changes into gas.

4.     What is friction? Mention one advantage and one disadvantage.

5.     What are renewable sources of energy? Give two examples.

6.     Explain respiration in humans.

7.     What is the function of red blood cells?

8.     Why is water called a universal solvent?

9.     Define force and name any two types of forces.

10.  What is global warming?