the answer is c in question 7
almost everything artafitial would have been made because of science. However nothing natural would exist because of science. All science does is look around and see what's up.
The properties that change how we perceive light waves are the following:
The amplitude of the light wave changes the brightness of light relative to other light waves of the same wavelenghth.
The frequency of the light wave changes the color and the type of the light wave.
Answer:
Atomic number of calcium is 20.
Answer:
an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
Explanation:
Look it up on google
