An ice skater's blade pushes down onto the ice very hard, creating water as a result of the pressure from the weight of the skater. How is her skate acting like a glacier?
A) Glaciers glide along the ground on only a small, thin blade of ice.
B) The weight of the ice in the top part of the glacier melts some of the ice at the bottom of the glacier, allowing for of plastic flow.
C) Glaciers always move over smooth ground, and the skating rink is smooth.
D) When the skater produces water at the bottom of the skate, that water impedes her motion. In a similar way, t
Ans: B) The weight of the ice in the top part of the glacier melts some of the ice at the bottom of the glacier, allowing for of plastic flow.
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Which statement best summarizes the law of conservation of matter?
A. We can rearrange matter but we cannot create or destroy it. B. Matter that is highly concentrated and readily available is most useful as a human resource. C. Matter consists of elements and compounds. D. Matter can undergo a physical change in its chemical composition. E. Matter should never be wasted.
Population Geography is
A) the distribution of humankind across our planet. B) the tracking of deer within an ecosystem. C) the analysis of the migratory patterns of the monarch butterfly. D) the number of pets per person in the United States.
Which of the following can cause enzyme activity to either increase or decrease?
A) changing the temperature B) changing the pH C) both a and b D) neither a nor b
It has been estimated that about ________ of the CO2 added to the atmosphere has been absorbed by seawater.
A. 5% B. 25% C. 40% D. 15%