MIXTURES
SOLUTIONS
SURFACE TENSION
ACIDS/BASES
CHEMICAL REACTIONS
100
a heterogeneous mixture
What is the mixture of sand and rice called?
100
sugar and water
What things would form a solution?
100
because the surface tension is strong enough to hold the needle
Why can a needle float on the water without sinking?
100
placing a drop of iodine on the item and seeing what color it turns
What is the method to test for starch?
100
a mixture of two solids
What is an example of a reversible change?
200
a homogenous mixture
What is a mixture of M & M's and Smarties called?
200
immisicible
What is a solution of oil and vinegar called?
200
because the tissue soaked up the surface tension and let the water in
Why would a basket filled with tissues sink?
200
soapy water, milk, melted snow
What are some examples of bases?
200
testing for starch, producing carbon dioxide
What is an example of an irreversible reaction?
300
use a sieve
What is the method used in separating a mixture of two solids?
300
by decanting - using an eye dropper
How can you separate a solution of oil and water?
300
the matches are pushed away from the center
What is the reaction of putting soap into the water and than placing matches on top?
300
apple juice, pickle juice, lemon juice
What are some examples of acids?
300
liquid, solid, gas
What are the three states of matter?
400
use a sieve and a magnet
What is the best way to separate a nails and wood shavings mixture?
400
using filtering - a sieve
How can you separate sand and water?
400
They put their arms straight out when they dive to break the surface tension before the rest of their body hits the water.
What do people do to break surface tension so that the water doesn't hurt their body when diving into water?
400
fizzing, bubbling
What is the reaction when you combine vinegar and baking soda?
400
Stretchy Putty
What do you make when you combine Borax water and white glue?
500
sand and water
What things would form a suspension?
500
an emulsion
What is a solution of liquid soap and water called?
500
the sugar attracts the matches towards the center
What is the effect of sugar in the water and than placing matches on top?
500
because vinegar is an acid and it ate away the shell making a chemical reaction
Why does the egg shell disappear when the egg is soaked in vinegar?
500
a chemical reaction
When two liquids make a solid, it is called?
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