A soft, black opaque carbonaceous rock that can be used to make pencils is
lignite
graphite
lead
coal
Correct answer is B
No explanation has been provided for this answer.
The biodiversity of an ecosystem may be reduced through the
extinction of plant species
removal of a single animal
introduction of a new plant
trapping of a single fish
Correct answer is A
No explanation has been provided for this answer.
The medium class of layered cloud which brings continuous rain, snow or sleet is the
altocumulus
altostratus
stratocumulus
nimbostratus
Correct answer is D
No explanation has been provided for this answer.
The direction of flow of ocean currents is determined mainly by the
rotation of the earth and land and sea breezes
shape of the continents and the temperature of the continental interior
prevailing winds and the rotation of the earth
depth of the ocean and the amount of fresh water inflow
Correct answer is C
No explanation has been provided for this answer.
humus content
layered profile
nutrient status
topsoil texture
Correct answer is B
No explanation has been provided for this answer.