Science Worksheet - Grade 8 Intermediate Level - The University Of The State Of New York - 2012 Page 8
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3223 The diagram below shows how a plant community changed over 300 years.
Barren
Crabgrass
Ragweed, aster,
Broomsedge
Pine
Mature pine
Oak and hickory
Mature, stable
soil
and
broomsedge,
and pine
trees
and young,
forest with pine
hardwood forest
horseweed
and pine
seedlings
deciduous trees
(mainly oak
seedlings
and hickory)
300 years ago
Present time
Which process caused the gradual changes shown in this plant community?
(1) urban growth
(3) environmental pollution
(2) global warming
(4) ecological succession
24 Which diagram best represents light being reflected after striking the flat surface of a mirror?
Mirror
Mirror
Mirror
Mirror
( 1 )
( 2 )
( 3 )
( 4 )
25 The diagram below shows the positions of the Sun, Earth, and the Moon as seen from space.
Moon’s orbit
Earth’s shadow
Sun
Moon
Earth
(Not drawn to scale)
Which event is caused by the Moon passing through Earth’s shadow?
(1) a meteor shower
(3) an eclipse
(2) a change of seasons
(4) an earthquake
[8]
Grade 8 Science — June ’12
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