A car travelling at 20 km/h has the same kinetic energy as a car of twice the mass. What is the speed of the heavier car?
A. about 21 km/s.
B. 10 km/h.
C. about 14.2 km/h.
D. not possible
Answer: A
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Which of the following is true about biomes in general?
A) Because evolution occurs over millions of years, the boundaries between biomes can be considered to be static over our lifetimes.
B) Biome boundaries are abrupt, with very distinct differences in appearance from one side of the line to another.
C) Biogeographers disagree on how many biomes there are and which types of landscapes should be considered part of the same biome.
D) Biomes only exist over land areas.
Of the four agents of erosion–water, wind, and ice–the one that can move only small-sized sediments is
A) water. B) wind. C) ice. D) all of these
The following diagram illustrates the Rock Cycle.
The diagram illustrates the Rock Cycle. Match the item below to step number 7 on the diagram.
A. Cementation and compaction (lithification) B. Heat and pressure C. Weathering, transportation, deposition D. Cooling and solidification E. Melting
It is easier to remove an invasive species than it is to control its introduction.
Answer the following statement true (T) or false (F)