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Biology Study Guide Topics

Endocrine System | Lymphatic System | Blood | Circulatory System | Skull Bones | Human Skull and Brain | Tissue Types | The Cell | DNA | Anatomy Models | Electron Transport Chain | History of Microbiology | Human Anatomy | Punnett Squares | What is Mitosis | What is Life | Macromolecules | Cellular Respiration | DNA Replication | Enzymes | Pathogenic Bacteria | Natural Selection | Punnett Squares | Transcription and Translation | Exam Notes | Viruses | Osmosis | Protists | Genetic Code | Mendelian Genetics | Meiosis | Sensory Processing | Amino Acids |



Online Presentations

Bones of the Human Skull | Tissue Types | Selective and Differential Media

Classroom Activities

Recombinant DNA Cut And Tape Classroom Activity


Units and Conversion Factors
Units of Length
meter (m)= 39.37 inches (in.)

= 1.094 yards (yd)
angstrom (Å)= 10–8 cm (exact, definition)

= 10–10 m (exact, definition)
centimeter (cm)= 0.01 m (exact, definition)yard (yd)= 0.9144 m
millimeter (mm)= 0.001 m (exact, definition)inch (in.)= 2.54 cm (exact, definition)
kilometer (km)= 1000 m (exact, definition)mile (US)= 1.60934 km
Units of Volume
liter (L)= 0.001 m3 (exact, definition)

= 1000 cm3 (exact, definition)

= 1.057 (US) quarts
liquid quart (US)= 32 (US) liquid ounces (exact, definition)

= 0.25 (US) gallon (exact, definition)

= 0.9463 L
milliliter (mL)= 0.001 L (exact, definition)

= 1 cm3 (exact, definition)
dry quart= 1.1012 L
microliter (μL)(μL)= 10–6 L (exact, definition)

= 10–3 cm3 (exact, definition)
cubic foot (US)= 28.316 L
Units of Mass
gram (g) = 0.001 kg (exact, definition) ounce (oz) (avoirdupois) = 28.35 g
milligram (mg) = 0.001 g (exact, definition) pound (lb) (avoirdupois) = 0.4535924 kg
kilogram (kg) = 1000 g (exact, definition)

= 2.205 lb
ton (short) =2000 lb (exact, definition)

= 907.185 kg
ton (metric) =1000 kg (exact, definition)

= 2204.62 lb
ton (long) = 2240 lb (exact, definition)

= 1.016 metric ton
Units of Energy
4.184 joule (J) = 1 thermochemical calorie (cal)
1 thermochemical calorie (cal) = 4.184 ×× 107  erg
erg = 10–7 J (exact, definition)
electron-volt (eV) = 1.60218 ×× 10−19 J = 23.061 kcal mol−1
liter∙atmosphere = 24.217 cal = 101.325 J (exact, definition)
nutritional calorie (Cal) = 1000 cal (exact, definition) = 4184 J
British thermal unit (BTU) = 1054.804 J1
Units of Pressure
torr = 1 mm Hg (exact, definition)
pascal (Pa) = N m–2 (exact, definition)

= kg m–1 s–2 (exact, definition)
atmosphere (atm) = 760 mm Hg (exact, definition)

= 760 torr (exact, definition)

= 101,325 N m–2 (exact, definition)

= 101,325 Pa (exact, definition)
bar = 105 Pa (exact, definition)

= 105 kg m–1 s–2 (exact, definition)

Footnotes

  1. 1 BTU is the amount of energy needed to heat one pound of water by one degree Fahrenheit. Therefore, the exact relationship of BTU to joules and other energy units depends on the temperature at which BTU is measured. 59 °F (15 °C) is the most widely used reference temperature for BTU definition in the United States. At this temperature, the conversion factor is the one provided in this table.

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