The earliest stage of a star's life before it begins to undergo fusion is known as: Retrograde
Planetesmals
Protostar
Solar nebula

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

multiple

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6