Questions & Answers
Which physical science MOST directly deals with the fundamental
nature of time, space, energy, forces, and motion of matter?
(Ans- Physics
The statement, "The total energy in a closed system stays constant," is
based on many years of experimental observations. The statement is an
example of a
(Ans- law
A scientific procedure done in order to test a hypothesis is
(Ans- an experiment.
At a scientific conference, a researcher suggests that fossil fuels did not
originate from the decomposition of organic materials but instead were
produced by inorganic means. What does this statement represent?
(Ans- Hypothesis
While on a hiking trip, several children become sick after drinking water
from a well. What is a hypothesis concerning this situation?
(Ans- Bacteria in the well may have caused the sickness.
, How does a hypothesis compare with a law?
(Ans- A law is supported by extensive evidence, but a hypothesis has
not been tested enough to be supported by extensive evidence yet.
A scientific theory is discarded
(Ans- if it is contradicted by new experiments or observations.
Theories help scientists
(Ans- explain large amounts of data.
Which model can be touched?
(Ans- Physical
Medical researchers want to be able to classify samples of cells by
shape rapidly from the way light shining on the cells from a laser is
scattered into different directions. Why might they run a computer
program to calculate the scattering from different tiny egg-shaped
particles for different lengths and widths instead of doing the tests on
real cells?
(Ans- The length, width, and height of the model cells can be adjusted
more easily than with real cells.