CHAPTER 1- THE STUDY OF LIFE

___________________: Study of living and once-living things

___________________: A person who studies living and once-living things.


People use biology in their everyday lives. ____________________ is used in science to solve everyday problems. Technology, including computers, is used to make artificial hearts, and to find genetic sequences.

Careers in Science

_______________________Uses a microscope to study hair, fibers, skin & blood

_______________________ Must know where to place beehives to get the most honey

_______________________ Must choose the best soil for a good crop

_______________________ Has studied eyes and knows how they work

 


Scientific Method

Scientists (and everyday people!) use a series of several steps to solve a problem. This is called the Scientific Method.

 

Steps of the Scientific Method:

 

_________________The factor being tested (causes changes in an experiment)

_________________ The experiment with the variable left out (used as a comparison)

 

_________________________ - Numbers (measurements, amounts)

_________________________ - Distinguishing characteristics (color, shape, texture)

 

Tools of Biology (Also refer to Microscope Diagram)

Microscopes are primarily used in biology to magnify things. There are several types of Microscopes:

__________________ lens: 10X magnification

__________________lens: Low Power = ______X magnification
                                            High Power = ______X magnification

Total Magnification = (Eyepiece Lens) X (Objective Lens)

 

 

Advantage: Can magnify up to ________________ X
Disadvantages: Cannot view objects in color, dyes are expensive, need skill & training

 

Measurements in Biology


_____________________________________________ – (SI Units, or the Metric System): Measuring system based on units of 10, used universally for scientific measurements.

To Measure___ of an Object…. Use this SI Unit: What does this measure? How To Measure/ Miscellaneous
Length  

 

How long something is Use a Ruler
Volume  

 

Amount of space something occupies V = L x W x H
Weight   Force of gravity on an object Changes with atmosphere (earth/ moon) – Use balance
Mass   Amount of matter inside an object Doesn’t change with atmosphere – Use a balance
Temperature   Amount of heat in something F = 1.8(C) + 32 (Scientists use Celcius) Boiling Point of water - 100  C

 

When moving to the ______________ with conversion factors, move your decimal point to the ______________ the same number of conversion factors you are moving.

 

Example: When converting from meters to kilometers, you are you are moving 3 conversion factors to the left. So, move your decimal point 3 places to the left: 2.0 m = 0.002 km. Now fill in the table:

 

k

h

da

meter (m), gram(g), liter(l)

d

c

m

kilo

hecta

deka

  (no prefix)

deci

centi

milli

1,000

100

10

1

1/10

1/100

1/1,000

     

5,000 g

     
 

40 hl

         
       

0.8 dm

   

 

 

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