Biome is an open system because energy and matter are constantly being transferred in and out.
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Answer:
C. a rolling bowling ball
I just answered this question on my quiz.
Part 1)
here we know that supply took 10 s to reach the ground
so here we will have




Part 2)
Here all the supply covered horizontal distance of 650 m in 10 s interval of time
so here we can say



<h2>
Answer: Infrared light</h2>
A dark nebula is a cloud of dust and cold gas, which does not emit visible light and hides the stars it contains.
These types of nebulae are composed mainly of the hydrogen they obtain from nearby stars, which is their fuel.
It is using infrared light that we can "observe" and analyze in detail what happens in the inner parts of these nebulae.
That's the definition of the PERIOD of the vibration.
It's exactly the reciprocal of the vibration's frequency.