Discussion Question 1
Theories, hypotheses, and laws form the life-blood of chemistry.
Using the South University Online Library or the Internet, conduct research on theories, hypotheses, and laws. Based on your research, answer the following:
- What do you think is the difference between a theory and a hypothesis?
- What is the difference between a hypothesis and a law?
- Is there a sequential move from one to another; amongst law, theory, and a hypothesis?
- Describe controlled conditions to find a scientific solution to a problem.
Discussion Question 2
Every measurement has a measurement uncertainty.
Using the South University Online Library or the Internet, conduct research on measurement uncertainty.
Based on your understanding, respond to the following:
- How can precise and accurate measurement be achieved in spite of the inherent measurement uncertainty? You could use either of the two measurement activities given below to provide empirical data:
- Take a ruler and measure the height of a textbook three times. Record the three measurements. Remember to report the smallest markings or "resolution" on your ruler.
- Take an egg and measure the weight of the egg three times. Record the three measurements. Explain the uncertainty in your measurements. Remember to report the smallest markings or "resolution" on your scale.
In addition to the above, respond to the following:
- What are the types of measurement errors? Explain at least three such errors.
- Which measurement errors apply to the activity that you chose?