Section A
Q1. Write S.I unit of universal gravitational constant.
Q2. What is the value of gravitational acceleration of the earth?
Q3. What is the acceleration of free fall?
Q4. Define third law of motion.
Q5. Rate of change of velocity is equal to ____.
Q6. Which if the following is a chemical change:
a) Rusting of iron.
b) Freezing of water.
Q7. Which seperation technique will you apply for the seperation of Butter from curd.
Q 8. What is disease?
Q9. Define tissue.
Q10. What is function of mitochondria?
Q 11. Name tissue present in brain.
Q 12. Give2 example of infectious disease.
Section B
Q13. Write any two points of difference between mass and weight.
Q14. Define uniform motion and non-uniform motion with example.
Q 15.Write any two points of difference between physical and chemical change.
Q16. Calculate the molar mass of:
a) Ethyne C2H2
b) Sulphur molecule S8.
Q 17. What are causes of disease?
Q 18. Draw label diagrams of parenchyma and collenchyma.
Q 19. Write note on plastids.
Answers
Answer:
3) All objects fall towards earth under the action of gravitational force of earth alone are said to be in free fall.
4) the square of time period of revolution of planet around the an is directly proportional to cube of the semi-major axis of the election orbit.
5)acceleration
9)a group of cells that are similar or dissimilar in origin which work together to perform a particular function is called tissue
10)mitochondria is also known as power house if cell. it stores power
Muscle power comes from mitochondria
11)nervous tissue
8)any disturbance in the structure or function of any organ or part of body
12)tuberculosis,commoncold,AIDS,tetanus
14)uniform motion-if an object travels equal distance in equal interval of time
non-uniform motion-if an object travels unequal distance in equal interval of time