Download Definitions A - Spanish Point Science

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Definitions
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Vacuole
• Fluid filled compartment within a cell
• Large and permanent in plant cells (filled with
cell sap)
• Small or absent in animal cells
Vein
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Type of Blood vessel
Brings blood into the heart
Have valves
Low in oxygen (except the pulmonary vein)
Velocity
• Speed in a given direction ms-1
• Acceleration =
Change in velocity
Time taken
Valency
• The number of electrons that an atom will give
take or share so that it has a full outer shell like
the nearest Noble Gas and is stable
• e.g valency of sodium is one
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valency of carbon is four
valency of chlorine is one
Vertebrate
• Animal with a backbone e.g. human or cat
Voltage
• Also called potential difference
• Voltage forces electrons to move around a
circuit (the push)
• V = Current X Resistance
• Measured in volts (V)
• Measured in parallel
• Measured using a voltmeter
Ohm’s law
Volume
• The amount of space an
object takes up
– its size
• Measured in cm3 or m3
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Volume = LxWxH
Or Use a measuring cylinder
Or overflow can and measuring cylinder
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Vacuole
Vein
Velocity
Valency
•Vertebrate
•Voltage
•Volume