# Chapter 2: Bio Study Guide

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Chapter 2: Bio Study Guide
Test 1 Review Questions Chapter 2
59-61: 1-6, 8-9, 13-14, 17-19, 24-25a, 29-30, 35-42
63: 1-7, 12

Pg. 59-60
1. How does quantitative information differ from qualitative information? Quantitative is numerical and Qualitative is descriptive.

2. What is a hypothesis? An explanation that is based on prior scientific research or observations and that can be tested.

3. a. What is a model in the scientific sense? A pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept

b. How does a model differ from a theory? A model explains one concept while a theory explains a body of facts and phenomena.

4. Why is it important for a measurement system to have an international standard? So that when scientists test each other’s experiments there will be a lower chance of mistakes.

5. How does a quantity differ from a unit? Use two examples to explain the difference. A quantity is a type of measurement while a unit represents a way to measure something. Ex1-A quantity is length; a unit used to measure length is a meter. Ex2- A quantity is mass; kilograms are used to measure mass.

6. List the seven SI base units and the quantities they represent. Meter(length), Kilogram(mass), Seconds(time), Kelvin(temperature), Mole(amt. of substance), Ampere(electric current), Candela(Luminous intensity.)

8. Identify the SI unit that would be most appropriate for expressing the length of the following.
a. width of a gymnasium- meter
b. length of a finger-centimeter
c. distance between your town and the closest border of the next state -kilometer
d. length of a bacterial cell- attometer

9. Identify the SI unit that would be most appropriate for measuring the mass of each of the following objects.
a. table- kilograms
b. coin- centigrams
c. a 250 mL beaker- grams

13. a. Why are the units that are used to express the densities of gases different from those used to express the densities of solids or

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