What are levels of ecology and how can we remember them

The levels of Ecology is organisms, populations, communities, Ecosystems, and Biosphere, but you can remember it by going over you notes every day and then you will slowly start to remember it and get the hang of it.

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the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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