The answer would be a.
a chemical change is a change to the chemical makeup of a substance so if the bonds are unchanged it would be a characteristic of a physical change
Answer:
See below
Explanation:
Energy is lost in the form of friction/heat/sound
you cannot get more work out of a machine than you put into it.
Answer:
D. circumpolar
Explanation:
A circumpolar star is a star, as viewed from a given latitude on Earth, that never sets below the horizon due to its apparent proximity to one of the celestial poles.
-Wikipedia
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Yes. With converging plates, where two plates are touching
towards each other instigating one to sub duct beneath the other, you incline
to have volcanoes and earthquakes. Instance: In Asia, the Pacific Plate touching
to and beneath the Eurasian Plate. Another example of where you would have
earthquakes is where two plates are slipping in contrary directions parallel to
one another. This is an instance of the Pacific Plate touching next to the
North American Plate. This makes faults or crashes in the plates instigating
earthquakes. As the plate slip past each other, subsequently separately plate
boundary isn't flawlessly smooth, they catch on one another and accumulate pressure.
When the pressure is free, the energy is gave out as an earthquake.
