BackBio Practical #1
Terms in this set (36)
Base Units
grams, liters, meter
Prefixes
kilo-10^3, centi-10^-2, mili-10^-3,micro-10^-6, nano-10^-9
Graphing Rules
X-axis: independent variable (variable you change) , Y-axis: dependent variable (variable being measured), include: title and units
Types of Graphs
Bar: categories, Line graph: changes over time, Scatter plot: relationships, Pie Chart: proportions
Scientific Method Steps
1) Observation
2)hypothesis
3)experiment
4)conclusion
Gradulated cylinder
volume
Pipet
small liquid transfer
balance
mass
Ruler
length
Beaker
holding/mixing
covalent bond
shares electrons
ionic bonds
transfer electrons
Hydrogen bonding
weak attraction
Cation
positive ion (paw=cat)
Anion
negative ion (onions make you cry which is sad)
Electrolyte
conducts electricity in water
meniscus
curve of liquid
displacement
water level changes
Volume
space occupied
Density Formula
D=M/V
M= D x V
V= M/D
units: g/mL or g/cm^3
Precision
consistency of repeated measurements
Accuracy
closeness to true value
controlled experiment
only one variable is changed
reactant
starting material in reaction
product
ending material in reaction
Acid
High H+ concentration
Base
Low H+ concentration
Buffers
resist in pH
Adding acid to a buffer
shifts reaction to the left (reactants)
Adding base to a buffer
shift reaction to the right (products)
Buffered Solution
small pH change
Non-buffered solution
Large pH change
crenation
cell shrinks in an animal cell
plasmolysis
when a cell swells in the plant; P=Plasmolysis
Microscope Base
supports microscope
Arms of microscope
used to carry microscope