Why does temperature data collected in more recent times have less uncertainty than for the past?
What will be an ideal response?
As techniques for measuring temperature become more standardized and instruments become more reliable, there is less variability in temperature measurements that can be attributed to the measurement itself, meaning that there is greater certainty that the measured value represents actual temperature. Also, when averaging temperature over a region, there is greater uncertainty in earlier values than more recent ones simply because there are many more measurement locations now (covering roughly 80% of Earth's surface) than previously (representing only about half of Earth's surface in the 19th century).
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Why do large, broad beaches have gradual slopes?
A) They have coarse particles. B) There is a minimal transport of sediments back to the ocean. C) They are not in equilibrium. D) They have a large area for wave energy to dissipate.
Energy is lost as it moves from one trophic level to the next because
A) one trophic level does not consume the entire trophic level below it. B) some of the calories consumed drive cellular activities and do not add mass. C) some ingested materials are undigested and eliminated. D) All of the above are correct.
Which of the following is not a base?
A) HPO42- B) OH- C) NH3 D) None, they are all bases.
More fresh water is stored in ice caps and glaciers than in freshwater lakes.
Answer the following statement true (T) or false (F)