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Answer:
By closed contours with hachures
Explanation:
A sinkhole is a depression in the ground that forms when water erodes an underlying rock layer.
Sinkholes are denoted by closed contours with tick marks (hachures) that point towards lower ground.
The topographical map below shows the difference between the contours of a hill and those of a sinkhole.
Answer:
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Explanation:
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Answer:
The energy released from food was once energy from the sun that was captured by plants in the chemical process that forms plant matter (from air and water). Food provides animals with the materials they need for body repair and growth and the energy they need to maintain body warmth and for motion.
Convection occurs because the oceanic waters heat up becoming less dense. .This water moves above the cooler water, and give off its heat to the surrounding environment. As it cools, it begins to sink, and the process begins again.