Science assignment (Class 9)

 

1.     State Newton’s First Law of Motion.

2.     What is the SI unit of force?

3.     Define density and write its formula.

4.     What is the difference between elements, compounds, and mixtures?

5.     Write the chemical formula of calcium carbonate.

6.     What is photosynthesis? Write its word equation.

7.     Define work in scientific terms.

8.     What is refraction of light?

9.     Name the parts of the human heart.

10.  What is natural selection?