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NAS 2 Challenge Final Exam 2024 Questions with 100% Correct Answers | Verified | Latest Update
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NAS 2 Challenge Final Exam 2024 Questions with 100% Correct Answers | Verified | Latest Update
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NAS 2 Final Exam1. Purpose of the Scientific Method: To answer questions and solve
problems
2. Identify the Steps of the scientific method: Observation, Hypothesis,
Predic- tions, Testing, Revise and Repeat, Report Results, Conclusion
3. OHPTRRC: our happy pets tease red rubber chickens
4. independent variable: controlled by the investigator
5. What is a dependent variable?: What you are measuring; not
controlled by experimenter
6. control group: standard of comparison for experimental group
7. experimental group: Group that is being experimented on with variable
8. homeostasis: the process by which living things maintain a
constant, stable internal environment.
9. mechanisms for homeostasis: receptor, control center, effector
10.negative feedback: Cells reverse direction to maintain homeostasis
11.positive feedback: cells maintain homeostasis by intensifying
change in the same direction such as child birth or blood clotting
1/
, 12.Describe basic atomic structure: Atoms have a nucleus (with 2
subatomic particles), protons, neutrons and electrons
13.ionic bonds: complete transfer of electrons between two atoms
14.covalent bonds: Bonds that share a pair of electrons between two
atoms
15.hydrogen bonds: Attraction between a hydrogen atom and an
electronegative atom
16.Why is water essential for life?: 67% of body weight, Covers 75% of the
Earth's surface, essential for organism survival
17.polar and non-polar covalent bonds: polar bond doesn't share
electrons equally and non-polar does
18.basic compounds of chemical reactions: Substrates, intermediate, end
prod- uct, enzyme, cofactors
19.chemical reaction: When chemical bonds are broken, formed, or
rearranged
20.substrate: substances that enter reaction
21.intermediate: any substance that forms between the start and end of
the path- way
22.end product: substances left at the end of the reaction
2/
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