Science 7th Grade Test: Question Preview (ID: 29656)

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Too much carbon dioxide mixing in the oceans causes -
a) fish scales turn colors
b) fish live longer
c) reefs grow larger
d) reefs die

Melting of polar caps also leads to -
a) flooding
b) transformation of the earth's crust
c) increased food supply for animals
d) global warming

Plants absorb ___
a) oxygen
b) nitrogen
c) helium
d) carbon dioxide

Melting of the polar ice caps leads to --
a) increased availability of drinking water
b) the earth's shape being transformed
c) severe storms
d) there are no effects on the earth

Too many ___ gases are being released into the atmosphere
a) greenhouse
b) nitrogen
c) false
d) oxygen

Ways to reduce global warming:
a) leaving refrigerator doors open to aid in cooling
b) reduce, reuse, recycle
c) not using a hair dryer as the heat intensifies global warming
d) driving faster

measures how alkaline or acidic something is
a) thermometer
b) barometer
c) pH scale
d) these things cannot be measured

A measurement of 7
a) is neutral
b) is highly acidic
c) is alkaline
d) is impossible because the scale ranges from 10 to 20

A measurement of above 7 is
a) is impossible because the scale ranges from 10 to 20
b) is alkaline
c) is highly acidic
d) is neutral

A measurement of below 7 is
a) is neutral
b) is acidic
c) is impossible because the scale ranges from 10 to 20
d) is basic

H2 is the symbol for:
a) hydrogen
b) helium
c) hotter than the boiling point
d) dihelium

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