HISTORY OF BIOLOGY PERIOD/STAGES 1. PRIMITIVE PERIOD -characterized by uncritical accumulation of information, mainly derived from the practical necessities of obtaining food, materials for clothing and shelter, substances to cure ailments, and necessary information about the human body. -accumulation of knowledge was not recorded, nor were there scientific method and associated intellectual activities. 2.
CLASSICAL PERIOD -began with the Greeks and continued with the Romans, marked by great curiosity about natural phenomena and ability to organize biological knowledge and record it.
SCIENTISTS
Hippocrates Father of Medicine
Aristotle Greatest Ancient Scientist - Father of Biology Theophrastus
3.
RENAISSANCE PERIOD th th -took place during the 14 to 16 century curiosity about the structure of living things were rekindled -by the middle of renaissance, anatomy, physiology, botany and zoology were established. 4. MODERN PERIOD -marked by the introduction of microscope at the beginning of th the 17 century.
Galen- Last Great Biologists of Antiquity - Greek physician Leonardo da Vinci Michael Angelo Andreas Vesalius- founder of modern anatomy William Harvey Robert Hooke Matthias Schleiden- botanist Theodore Schwann-zoologist Schwann-zoologist Anton van Leeuwenhoek Francesco Redi Lazzaro Spallanzani
Carolus Linnaeus-Father of Taxonomy Jean Baptiste Lamarck Charles Darwin
Loius Pasteur- The Father of Modern Microbiology Claude Bernard and Johannes Muller Karl von Baer Gregor Mendel Hugo de Vries E.H. Starling th
20 century Cowla(botanist),Clements(botanist) Shelford(zoologist)
CONTIBUTIONS
-stated that diseases have natural causes & the body has the power to repair itself. -most significant biological contributions, studied hearts and brains of animals. -excelled in making observations -studied almost all areas in science. -pupil of Aristotle -carried on pioneers studies on the nature of plants -his works are the most complete biological treaties to reach us from classical period. -began to study human anatomy and st carried out the 1 physiological experiments in animals. -both made accurate studies in plants and animals and human anatomy. -published his book, The Structure of the human Body -described the blood circulation in man which contributed to physiology. -formulated/conceptualized -formulated/conceptualized the Cell Theory -made the first microscope -disapproved the spontaneous origin of life from non living matter matter -experimented on the idea of Francesco Redi. -established the system of nomenclature in which all living things are arranged by genera and species. -proposed the theory of evolution -most outstanding contribution in evolution -proposed the Natural Selection as an explanation by which evolutionary changes take place. -laid the foundation of modern microbiology. -established comparative physiology. -founded comparative embryology -made studies on genetics -formulated the mutation theory -his work increased our knowledge on hormones under endocrinology. -they put ecology on a modern basis.
PHYSICAL SCIENCE:
SCIENTIFIC METHOD- a systematic way of solving problems
-
PROBLEM
the application of a logical process of reasoning to arrive at a model nature that is consistent with experimental results.
OBSERVATION
HYPOTHESIS
EXPERIMENT
THEORY
APPLICATION
MEASUREMENT - the process of comparing the size or unknown quantity of matter with a known quantity or chosen standard. PHYSICAL QUANTITIES
William Thomson (1824-1907)-also known as Lord Kelvin stated the importance of numerical measurement: I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot express it in numbers, y our knowledge of it is meager and unsatisfactory kind. A quantitative observation or measurement, always consists of two parts: a number and a unit. Units provide a standard of comparison for a measurement. E.g. 3 kg, 4 ft. 24 hours SYSTEMS OF MEASUREMENT
1. Metric System (CGS System) - the universally accepted system of measurement, also known as SI (International System or Systemme Internationale- system of units that scientists have agreed upon and is legally enforced in almost all parts of the world.) fully adopted in the Philippines on January 1, 1983, under Batas Pambansa no.8. originated in France in 1791, measurements may be expressed as fractions or multiples of ten times the base unit. 2. English System (British System) first adopted in England, also known as FPS System, derived from the names of the standard units of length (foot), weight (pound) and time (second). A. Fundamental Quantities - basic quantities, quantities that are directly measured. 7 Fundamental Quantities PHYSICAL QUANTITY Length Mass Time Electric Charge Temperature Amount of Substance Luminous Intensity
Symbol for Quantity l m t Q T n
I
SI Base Unit meter kilogram second Coulomb Kelvin mole candela
Symbol of Unit m kg s C K mol Cd
B Derived Quantities- when the quantities are expressed as a combination of fundamental or basic quantities. .
Derived Quantities PHYSICAL QUANTITY Area Volume Density Speed/velocity Acceleration Force/weight Pressure Work Power
Symbol for Quantity A V D v/v a F/W P
W P
SI Base Unit square meter Cubic meter Kilogram per cubic meter Meter per second Meter per second squared Newton Pascal Joule watt
Symbol of Unit m m kg/m m/s m/s N Pa or N/m J W
Common Prefixes for Measurement Units Prefix atto femto pico Angstrom nano micro milli centi
Symbol a f p A n µ m c
Factor 10 10 10 10 10 10 10 10
Prefix deci deca hecto kilo mega giga tera
Symbol d da H k M G T
Factor 10 10 10 10 10 10 10
Commonly Used Physical Quantities
1. Mass & Weight Mass-quantity of matter that it contains Weight- is the force that gravity exerts on a body Balance is used to measure the mass or weight of an object. Different types of balances: Platform and Triple Beam Balance- moderately accurate measurement is done, sensitive to 0.1 gram. Digital/Analytical Balance- used for more accurate work, sensitive to 0.001 gram to 0.0001 gram. Spring Balance used to measure the weight of the body directly and is given in the units of force, the Newton (N). The spring is stretched until the force of g ravity acting on the body is equal to the backward pull of the spring. 2. Length & Volume Length- distance, the standard or base unit is me ter. Ruler, meterstick, caliper are used to measure the length of an object. Volume- it is defined in terms of standard length. Volume of regular solids is obtained by measuring its dimensions. Volume of liquid is commonly measured using a graduated cylinder, pipette, burette, and volumetric flask. 3. Density and Specific Gravity Density- defined as the ratio of the samples mass to it s volume. Density of liquids and solids is usually expressed in grams per milliliter (g/ml) or gram per cubic meter (g/cc) and in gas, g/L. Specific Gravity or Relative Density is a ratio of that substance to the density of a reference substance. Water is the reference substance used for solids and liquids, for g ases, air and hydrogen is used. It has no unit. 4. Pressure defined as a force per unit area. It is measured in Newton per square meter equal to Pascal, other units use, psi, torr and atmosphere. Manometers- used to measure the pressure of li quids or gases. Barometer- used to measure atmospheric pressure devised by Evangelista Torrecilli. 5. Temperature- the measure of the kinetic energy of a body, also the measure of how hot or cold a substance is. Thermometer- used to measure temperature; alcohol and mercury are used in thermometers. Clinical thermometer- used to measure the small variations in the temperature of a human body. Temperature Scales: Water Freezing pt Boiling pt. Celsius Scale (Anders Celsius) 0 C 100 C Fahrenheit (Daniel Gabriel Fahrenheit) 32 F 212 F Kelvin (William Thomson) 273 K 373 K CONVERSION- Factor-unit method having a numerator and a denominator representing a relationship is used. To convert one quantity to the other, follow the g iven steps: 1. Write down the given quantity. 2. Multiply/divide the given quantity by one or more factors such that the units of factors. 3. Cancel the units of the known quantities and genera te the units of the desired quantity. SIGNIFICANT FIGURES- are those digits in a number with known certainty plus the digit that is uncertain. Rules Governing the Identification of Significant Figures:
All nonzero digits are significant. (346, 3 SF) All zeros between two nonzero digits are significant. (101.02, 5 SF) Zeros at the right of a nonzero digi t but to the left of a n understood decimal point is not significant. (100, 1 SF, 1020, 3 SF, 1000., 4 SF) Zeros to the right of n understood decimal point and f ollowing a nonzero digit is significant. (1.500, 4 SF, 10.10, 4 SF) Zeros to the right of an understood decimal point and preceding a nonzero digit are not significant. (0.005, 1 SF) In addition and subtraction, express the final results with the last dig its corresponding to that uncertain figure occurring in that component/factor with the le ast number of decimal places. (0.0521 + 1.3456 + 3.56 + 4.9577 = 4.96) In multiplication and division, express the final result in as many significant figures as are contained in the factor having the least number of sig nificant figures. (1.5 x 2.0 = 3.0, 2 SF) , 22.0/3.1416 = 7.26, 3 SF) All factors should be rounded off after computation.
SCIENTIFIC NOTATION- a convenient way of expressing very large and very small numbers. M x 10 where M is a decimal number with one nonzero digit before the decimal point; and n is s whole number. FORMULA TRANSFORMATION- a rearrangement of the symbols in a g iven formula, a process of changing the subject of the formula. Formula- a set of algebraic symbols representing a mathematical fact, rule or principle. PRECISION- the agreement of a set of results among themselves. Two forms of deviation, Absolute deviation (AD) the difference between the measured value (Mo ) and the mean (M) for the set of se veral measurements. Relative Deviation- is calculated by dividing the absolute deviation by the mean. ACCURACY- refers to the closeness of a measurement to the accepted value for a specific physical quantity. Absolute error is the actual difference between the measured value and the accepted value. Relative Error is often called percentage error.
NAME:________________________________________________________________ DATE: ____________________ YEAR & SECTION:_____________________________________________________SCORE:___________________
EXERCISES: A. SIGNIFICANT FIGURE
Write the number of Significant Figures the following numbers have. Write your answer in the space provided before the letter. ____a) 0.016036
b) 983 _____
_____c) 7.0001
____d) 1007
____g) 125, 000
_____h) 0.00005 _____i) 3, 000, 000 ____j) 102
____e) 706.5
____k) 400900 ____l) 22. 234500
B. SCIENTIFIC NOTATION
I. Express the following numbers into scientific notation a) 706.5 = _____________________________________________ b) 0.00123 = ___________________________________________ c) 125, 000 = ___________________________________________ d) 0.000000034 = _______________________________________ e) 3, 000, 000, 000 = _____________________________________ f) 0.015730 = ___________________________________________ g) 13.2 = _______________________________________________ h) 0.005976 = ___________________________________________ i) 56700000007 = _______________________________________ j) 220000000000 = ______________________________________ II. Change the following scientific notation into their standard form. a) b) c) d) e) f) g) h) i) j)
7
9.3 x 10 = ________________________________________ 3.2 x 10-3 = ________________________________________ 1.03 x 10-8 = ________________________________________ 8.09 x 1012 = ________________________________________ 3.4 x 104 = _________________________________________ 6 2.56 x 10 = ________________________________________ -5 1.097 x 10 = _______________________________________ 2 55.7 x 10 = ________________________________________ 9.86 x 10 -4 = ________________________________________ 12.78 x 109 =________________________________________
C. CONVERSION Convert the following measurements to the required unit. a) b) c) d) e) f) g) h) i) j)
508 g = ____________ kg 1200 mL = __________cubic meter 10 m/s = ___________km/h 2L = ___________mL 250 mg = ___________g 40 cm = ____________m 355 micro meter = _____m 76 Gigabyte = ________ byte 5890 kg = ___________cg 12905 s = ___________h
D. FORMULA TRANSFORMATION
Derive the formula for x using the following equations. Show your solution
a) b) c) d) e)
C= 2mx P= 2l + 2x b = ax ±s c = s/x A = 2xhr/3V
____f) 340000
BULACAN STATE UNIVERSITY BUSTOS CAMPUS BUSTOS, BULACAN NAME:________________________________________________________________ DATE: ____________________ YEAR & SECTION:________________________________________________________
PROJECT PROPOSAL in Environmental Science
I. II.
III.
PROJECT TITLE: RE-USE TO PRODUCE SPECIFIC TITLE:_________________________________________________________ OBJECTIVES: 1. To create new and functional things from garbage, trash, scraps and used materials. 2. To respond to the immediate garbage problem encountered by the community. 3. To develop students¶ skills in identifying environmental problems and possible solutions. 4. To develop students¶ creative thinking skills, resourcefulness and self-reliance. MATERIALS/BUDGET: USED MATERIALS TOOLS
IV.
ILLUSTRATION
V.
PROCEDURE:
VI.
POSSIBLE IMPLICATIONS:
VII.
RESULT/DOCUMENTATION: (1photo of maker with product and 1 of the product)
