Differentiate between experimental and observational research.

  • Experimental Research: Involves manipulating variables and observing the effects in a controlled environment. The researcher directly controls the independent variable to test its impact on the dependent variable. Example: Testing the effect of temperature on plant growth in a lab.
  • Observational Research: Involves observing and recording phenomena as they naturally occur without manipulation or intervention. The researcher studies subjects in their natural environment. Example: Observing animal behavior in the wild.

Related Questions:

  1. Define the following branches of physics:
  2. Define the terms theory and law. Also, give two examples of each.
  3. Define Hypothesis?
  4. What is the difference between classical mechanics and quantum mechanics?
  5. What determines the validity of a theory?
  6. Which part of the study is not handled by the classical study of physics?
  7. Define the scientific method and list its key steps.
  8. Explain why theories are modified over time.
  9. Discuss the importance of physics in our daily life.
  10. Briefly discuss the importance of physics in other disciplines of science.
  11. Differentiate the terms ‘science’, ‘technology’, and ‘engineering’ with suitable examples.
  12. Explain the terms hypothesis, theory, and law with examples.
  13. Q2. List with brief descriptions of different branches of physics.
  14. Q4. How many kilometers are there in 25 micrometers?
  15. Q5. What is pitch and least count of: a. Vernier calipers if the smallest division on the main scale is 1 mm and total divisions on the vernier scale are 20. b. Screw gauge if the smallest division on its main scale is 0.5 mm and its movable scale has 50 divisions.
  16. Q6. Look at the measurement of vernier calipers:
  17. Q7. Look at the figure of screw gauge, let a small steel ball is place between its thimble and anvil then:
  20. SEPARATION TECHNIQUES