Which is an example of plasmas in nature?

a. solar cells
b. plasma balls
c. auroras
d. clouds

c. auroras

(my answer was deleted for some reason by staff? idk)

The correct answer is option C.

Explanation:

Plasma is the state of matter composed of ionized gas which formed by providing energy to gases so as to free the electrons from the their respective atoms.

Auroras are reddish greenish lights in the sky which are seen near the southern and northern magnetic pole. This effect is due to the interaction between the charge particles from the sun and gases present in Earth atmosphere.

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.

chemical properties are the characteristic of matter which can only be observed by changing the chemical identity of a sample like flammability reactivity and toxicity.