The Jewelry is made of silver.
Let us consider the statements individually;
2) Falling barometric pressure precedes the onset of bad weather - This is a law because it has been proven experimentally.
All life on earth has evolved from a common, primitive organism through the process of natural selection - This is a theory because it is just an explanation of an observation without empirical proof.
My truck’s gas mileage has dropped significantly, probably because it’s due for a tune-up - This is a hypothesis because it is a mere guess.
10) A het--erogenous mixture consists of more than one phase while a hom--ogeneous consists of only one phase. Both of them contain substances that are not chemically combined together.
12) An element differs from a compound in the sense that compounds are composed of elements. Both a compound and an element are pure substances.
16)
Copper - element
Water - compound
Nitrogen - element
Sulfur - element
Air - Mixture
Sucrose - compound
A substance composed of molecules each of which contains two iodine atoms - compound
Gasoline - Mixture
28)
Coal burning - chemical change
Ice melting - physical change
Mixing chocolate syrup with milk - physical change
Explosion of a firecracker - chemical change
Magnetizing of a screwdriver - physical change
32)
Volume - extensive
Temperature - extensive
Humidity - extensive
Heat - extensive
Boiling point - Intensive
The density is obtained from;
Density = 132.6 g/61.2 mL - 48.6 mL
= 10.5 g/mL
The Jewelry is made of silver.
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