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IB 150 Exam 1 With Complete Solutions Latest Update

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IB 150 Exam 1 With Complete Solutions Latest Update

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  • October 27, 2024
  • 18
  • 2024/2025
  • Exam (elaborations)
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Solution 2024/2025
Pepper

IB 150 Exam 1 With Complete Solutions Latest
Update

Biological science ANS✔✔ The study of life



Organism ANS✔✔ A living entity made up of one or more cells



5 fundamental characteristics of an organism ANS✔✔ 1. Cells

2. Replication

3. Information

4. Energy

5. Evolution



Hypothesis ANS✔✔ A testable statement based off of scientific theory



Theory ANS✔✔ A hypothesis that has been tested with a significant amount
of data



Experiment ANS✔✔ Allow researchers to test the effect of a single



Independent variable ANS✔✔ Variable being manipulated

- on the x axis

, Solution 2024/2025
Pepper
Dependent variable ANS✔✔ Variable being measured, depends on
independent variable

- on the y axis



Orders of increasing complexity ANS✔✔ 1. Organic molecules

2. Organelles

3. Tissues

4. Organs

5. Organisms



Cell ANS✔✔ Fundamental unit

- Semipermeable membrane that surrounds a space that contains various
organic molecules inside that



Homeostasis ANS✔✔ Organisms maintain a stable internal environment that
is distinct from the external environment



How does an organism maintain homeostasis? ANS✔✔ Work against the
natural flow of energy

- Endergonic reactions



Kinetic energy ANS✔✔ Energy of motion



Potential energy ANS✔✔ Energy that is stored in a population

, Solution 2024/2025
Pepper
1st law of thermodynamics ANS✔✔ Energy cannot be created or destroyed



Enthalpy (H) ANS✔✔ Total energy in a molecule



Exothermic ANS✔✔ Reaction releases heat

- Products have less PE than reactants

- delta H-



Endothermic ANS✔✔ Heat is taken in during the reaction

- Products have more PE than reactants

- delta H+



Second Law of Thermodynamics ANS✔✔ The total entropy always increases
in a system that includes the surroundings as well as the products of the
reaction

- Consequence: nothing can be 100% effiicient



Entropy (S) ANS✔✔ Amount of disorder of any system



Equilibrium ANS✔✔ maximum disorder



Less order ANS✔✔ delta s is positive

- more disorder from reactants to products



More order ANS✔✔ delta s is negative

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