Answer:
B. Brain and spinal cord
Explanation:
because we need both in order to survive and work properly.
If a star is 300 light-years from Earth, it will take 300 light years from that star to reach Earth. So, the correct option is A.
A light year is defined as the larger unit of length used to express astronomical distances which is approximately equal to 9.46 trillion kilometers or 5.88 trillion miles.
A light year is explained as a measure of distance and not as time where light travels at a speed of 300,000 km/s where the distance that light will travel in one year is considered as a light year which is 9.4611012 is equal to km. When a star is 300 light-years from Earth, it will take 300 light years from that star to reach Earth.
Therefore, the correct option is A.
Learn more about Light years, here:
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Your question is incomplete, most probably the complete question is:
If a star is 300 light years away from Earth, how long does it take light from that star to reach Earth?
A. 300 light-years
B. 300 years
C. 300 hours
D. 300 days
Answer:
Explanation:
Synthetic is something that is not made from natural materials but rather made from the synthesis of other materials in a lab. This is mostly done in clothing where you have some natural materials like cotton and other materials that are synthetic. This doesn't mean it is not high quality. It is actually preferable for some sports for example to wear synthetic clothing instead of cotton.
Answer:
Bacteria are unicellular microorganisms that are not visible by the naked eye. they are found everywhere and exist in millions in population. some of them are harmful while some are essential for us like lactobacillus which helps in formation of curd.
b.thunderstorm that does not produce lightning or thunder.
c.thunderstorm that does not produce hail.
the bread. She repeated the process with a slice of bread using red plastic wrap & a slice of bread using
blue plastic wrap. The bread came from the center of the same loaf. In each case she used the same
amount of water and the same brand of plastic wrap. She wrapped the different slices of bread in the
same way.
Independent variable:
I
Dependent variable:
Control:
Answer:
Explanation:
An independent variable can be described as the variable that is intentionally altered during the experiment by the researcher and is not affected by any other variable involved in the course of the experiment. From this description, the independent variable in the question are the "plastic wraps".
A dependent variable can be described as the variable that is been experimented on or has the tendency to be affected by the independent variable. From this description, the dependent variable here is the "time" it will take for the bread to mold.
The control of an experiment can be described as the "normal" or the "standard" experiment in which other experiments in the same research of the same nature are compared with. From this description, the control of this experiment is the experiment done involving the clear plastic wrap.