121. When molten rock cools
and solidifies, the ________ are formed.
A. igneous rocks
B. satimantary rocks
C. metamorphet rocks
D. none of these
122. Molten rock below the
surface of the Earth is called?
A. Lava
B. Magma
C. Crystals
D. Granite
123. Molten rock above the
surface of the Earth is called?
A. Lava
B. Magma
C. Crystals
D. Granite
124. The metal which is liquid
at room temperature is?
A. Zinc
B. Nickol
C. Lead
D. Mercury
125. Between the melting point
and boiling point of a substance, the substance is a?
A. Solid
B. Liquid
C. Gas
D. Crystal
126. The boiling point of
alcohol is
A. 78 oc
B. 86 oc
C. 94 oc
D. 100 oc
127. The visible cloud of dust
and gas in space is called?
A. White Dwarf
B. Supernova
C. Nebula
D. Galaxy
128. The average salinity of
the Earth's oceans in 1 kilogram of sea water is about ________ grams of salt.
A. 90
B. 25
C. 30
D. 35
129. The most abundant
substance that constitutes the mass of the Earth is?
A. Iron
B. Oxygen
C. Nitrogen
D. Silicon
130. The Earth's atmosphere is
divided into ________ main layers.
A. 4
B. 5
C. 6
D. 7
ANSWERS:
121.
A
122.
B
123.
A
124.
D
125.
B
126.
A
127.
C
128.
D
129.
A
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