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science ch 35
n/a
19
Science
9th Grade
12/05/2011

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Cards

Term
what is area ?
Definition
it is the amount of surface enclosed within its boundary lines.
Term
what is volume?
Definition
it is the amount of space taken up by an object!
Term
how can you measure volume?
Definition
multiply the length by width by height!
Term
what is density?
Definition

it is the mass per unit volume! =devidd volume into mass = mass over volume

 

 

 

Term
how do you find the density of an irregular solid?
Definition
  1. find out the mass of the volume by putting it on an electric balance.note the reading!
  2. find out the volume of the irregular solid by 1.fill up an overflow can just up to the top where the water falls out.2. wait until 1 drop  drops out! 3. place a measuring cylinder underneath the overflowcan. 4. place the irregular solid into the overflow can with a string wrapped around it! 5. read the volume of the liquid!
Term
what are burettes  and pippettes used for ?
Definition
to transfer a definite amounts of liquid.
Term
  1. what is the unit and symbols of the following.
  2. length
  3. mass
  4. time 
  5. temperature
Definition

1.length = metres = symbol =m

2.mass = kilogram = symbol = kg 

3.time = seconds = symbol = s

4.temperature = degrees celsius = 0

Term
what is physics?
Definition
deals with how and why things behave as they do !
Term
how do scientists collect evidence?
Definition
by observing and using information collected by other scientists!
Term
what is the mass of the object!
Definition
it is the amount stuff in it and the amount  of matter in it
Term
how is the mass of an object found ?
Definition
by using a balance or scales!
Term
how is time measured!
Definition
by A stopwatch or stopclock
Term
how is the temperature of an object measured?
Definition
how hot or cold the object is!
Term
what is temperature measured with!
Definition
a thermometer or a temperature sensor!
Term

what is the melting point of

1. melting point of ice

2. boiling point of water

3. normal temperature of human body!

Definition

1. 0 degrees celsius 

2.100 degrees celsius

3. 37 degrees celsius

Term
what is filtration?
Definition
it is used to seperate an insouble liguig using a material that allows the liquid to pass through  e.g soil and water,rocksalt , pure water from sea water.
Term
what is evaporation 
Definition
it is when a  liquid is changed to a gas e.g salt and water 
Term
what is simple distillation?
Definition
to seperate a liquid and a soluble solid e.g pure water from sea water.
Term
paper chromatography
Definition
is used to seperate mixtures of substances in solution.
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