MODULE 1: THE SCIENCE OF LIFE: ON YOUR OWN QUESTIONS Flashcards
1.1
When trying to convince you of something, people will often insert “Science has proven…” at the beginning of a statement. can science actually prove something? Why or why not?
Science cannot prove anything. The best science can say is that all known data support a given statement. However, since all data come from experiments that might be flawed, there is no way that science can prove anything. If the eperiments that produced the data that support a particular statement are flawed, the statement might be wrong.
1.2
A scientist makes a few observations and develops and explanation for the observations that she has made. At this point, is the explanation a hypothesis, theory, or scientific fact?
It is a hypothesis. The explanation will have to be tested with a significant amount of data before it can even be considered a theory.
https://www.youtube.com/watch?v=SMGRe824kak
1.3
Why is it important for scientists to test only one variable at a time when experimenting?
Scientists should test only one variable at a time so that they know the variable they’re testing is the only factor affecting the outcome of the experiment.
https://www.youtube.com/watch?v=Zwv3LIg2NjE
1.4
Explain the relationship between an independent variable and a dependent variable.
An independent variable is manipulated by the scientist and a dependent vaiable responds to the independant variable.
1.5
Describe the impact Pasteur’s work had on the scientific community.
Pasteur showed that all living things come from other living things and that spontaneous generation was not possible.
https://www.youtube.com/watch?v=OXdbQ1JkX7c&t=6s
https://www.youtube.com/watch?v=oLKaJtv-QbU
https://www.youtube.com/watch?v=1lLNZQVPpQA&t=2s
https://www.youtube.com/watch?v=OFWIGBnmSP8
https://www.youtube.com/watch?v=2JdBH2tys6M
Questioning Germ Theory: https://www.bitchute.com/video/y91RMKvjgqm4/
1.6
Should scientific laws be considered 100% reliable? Explain
Scientific law should not be considered 100% reliable. The nature of science is to change theories and laws when new evidence requires it. Because it is impossible to fully test a scientific law and because laws are tested by experiments that might be flawed, scientific laws are not necessarily true. They represent the best conclusions that science has to offer, but they are nevetheless not completely reliable.
https://www.youtube.com/watch?v=GyN2RhbhiEU
1.7
List the criteria all living organisms possess.
All living things:
- are composed of cells
- grow
- require energy to power activities
- maintain a stable internal environment
- contain hereditary information in their DNA
https://www.youtube.com/watch?v=jpO52VTHecQ
https://www.youtube.com/watch?v=Umg4io_YrTY
1.8
A biologist studies an organism and then two of its offspring. They are all identical in every possible way. Do these organisms reporduce sexually or asexually.
Since the offspring are identical in every way to the parent, it is asexual reproduction.
https://www.youtube.com/watch?v=co5jZId0F-g
1.9
How are unicellular and multicellular organisms alike? How are they different?
Unicellular and multicellular organisms are alike in that they all possess the criteria for life. They are different in that the unicellular organisms are one-celled and multicellular organisms have more than one cell.
https://www.youtube.com/watch?v=9SLYdENgsog
https://www.youtube.com/watch?v=FK9xHry877U
1.10
Why is it important that scientists use a common SI system of measurement?
Scientist use the SI system of measurements so that they can compare results and replicate each other’s research more easily.
https://www.youtube.com/watch?v=oAtDAoqdExw
https://www.youtube.com/watch?v=OKC_g3obGTo
https://www.youtube.com/watch?v=5iXyyQBGl-Y
1.11
What is the difference in the way light microscopes and electron microscopes produce images?
Light microscopes use visible light passing through a specimen and a combination of two lenses. Electron microscopes do not use light. They use electron beams to either pass through or scan across the surface of the specimens.
https://www.youtube.com/watch?v=bjcewKLlb2Y
https://www.youtube.com/watch?v=Ue-86MDmjns
1.12
A biologist is studying viruses, which are much smaller than cells. Which type of microscope should the biologist use if she wants to study the internal structure of the virus.
She should use a transmission electron microscope (TEM) BECAUSE TEMs send an electron beam through a thin specimen so that we can see the internal structures whereas SEMs run the electron beam back and forth over a specimen to give an image of its surface.
https://www.youtube.com/watch?v=a0G7iyz4McM
