Low velocity im pretty sure
Answer:
Argon
Explanation:
Argon, an inert gas, is the third most abundant gas in the atmosphere.
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There's not enough information to find an answer.
I think the idea here is that in descending (416 - 278) = 138 meters,
the glider gives up some gravitational potential energy, which
becomes kinetic energy at the lower altitude. This is all well and
good, but we can't calculate the difference in potential energy
without knowing the mass of the glider.
Here's an unorthodox approach that you might try:
READ each choice and think about it for a coupla seconds !
<span>A) diversity improves an established ecosystem.
No. The results were not an improvement.
B) genetic variation leads to the formation of a new species.
No. There's no mention of genetic variation or new species in the story.
C) the introduction of non-native species upsets a balanced system.
YES ! That's exactly what is described in the story.
D) changing in one part of a system does not affect other parts of the system.
</span>
No. A very great effect on the system is described.