VII Standard - 7th - Science - First Midterm Test Question Paper - Samacheer Kalvi

 

            First Midterm Test

Standard: VII                                                                                      Marks:50

Subject :  Science                                                                                 Duration: 1.30 hrs                                                                   

 

I . Choose  the  correct  answer :                                                                        10X1=10                                     

1. Which of the following is a derived quantity?

a) mass                             b) time                                c) area             d) length

2. Light year is the unit of

a) distance                        b) time                               c) density         d) Both length and time

3. SI unit of density is

a) kg/m2                           b) kg/m3                            c) kg/m           d) g/m3

4. The basic unit of matter is ________

a). element                         b). atom                            c.)  molecule  d). electron

5. _______ is positively charged.

a. Proton                           b. Electron                         c. Molecule    d. Neutron

6. The sub-atomic particle which revolves around the nucleus is _______

a. atom                            b. neutron                           c. electron       d. proton

7. The atomic number of an atom is the _______

a. number of neutrons                                  b. number of protons

c. total number of protons and neutrons      d. number of atoms

8. Asexual reproduction in yeast is

a. spore formation             b. fragmentation             c. pollination  d. budding

9. Reproductive part of a plant is

a. root                               b. stem                              c. leaf           d. flower

10. Pollinators are

a. wind                              b. water                           c. insect            d. All the above

II .Fill in  the blanks :                                                                                                  5X1=5

11. Density of mercury is _______________.

12. The area of a leaf can be measured using a________________________.

13. The _______________ revolve around the  nucleus.

14. Onion and garlic are example for __________.

15. The male reproductive part of a flower is  __________.

III.Answer any 10 of the following:                                                                      10X2=20                                                                           

16. Name some of the derived quantities.

17. Name the liquid in which iron ball sinks.

18. Define the density of objects.

19. What is one light year?

20. Define – Atom.

21. Name the sub-atomic particles.

22. What is atomic number?

23.. What are the characteristics of proton?

24. Write two types of reproduction in plants.

25. Define – Pollination.

26. What is cross pollination?

27. Give example for Corm and Tuber

IV.Answer any 3 of the following                                                                    3X5=15

28. Describe the graphical method to find the area of an irregularly shaped plane figure.

                                                            OR

     How will you determine the density of a  stone using a measuring jar?

29. Draw the structure of an atom and explain  the position of the sub-atomic particles.

                                                            OR

      What are nucleons? Why are they called so? Write the properties of the nucleons.

30. Write a brief account on pollination.

                                                            OR

     Explain the underground stems.