Examlex
Timothy is a quiet 6-year-old who is usually withdrawn in class.As a result,he does not receive much attention from his peers and mostly plays by himself.According to Sandra Scarr,this is an example of a(n) _____.
Scratch Test
A method used to determine the relative hardness of minerals by scratching them with an object of known hardness or with other minerals.
Effervescence
The potential of a mineral to have a vigorous bubbling reaction when a drop of dilute hydrochloric acid (HCl) is placed on it.
Magnetism
A physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
Specific Gravity
The ratio of the density of a substance to the density of freshwater.
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