Match the phrases in column a and column b
column a
1. general or nonspecific observation
2. educated guess
3. when two variables change in the same direction, one remaining larger than the other by the same factor
4. "measured" observation
5. standard, reference data, or experiment
6. a presently accepted explanation of how something happens
7. a statement that explains what something does under the same conditions
8. a curve drawn to average the data's deviations

column b

qualitative
control
direct relationship
quantitative
hypothesis
law
best fit curve
theory

are you like autistic or something?

xd

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.