Berlin Airlift <span>was the result of the Soviet Blockade during 1948-1949 and brought air support from the US and British forces. The correct option among all the options that are given in the question is the fourth option or the last option. I hope that this is the answer that has actually come to your great help.</span>
Answer:
1: It moves in straight line called Rectilinear Propagation of light.
2: It is stream of Corpuscles by Newton.
3: It is also Electromagnetic wave.
4: It have incredible speed in vacuum about 299792458 m s-1.
5: It's Frequency unchanged when passed from one medium to other.
6: It's Wavelength changed when passed from one medium to other.
7: It totally passed by transparent.
8: It partially passed by Translucent.
9: It not passed by Opaque at all.
10: It bounces back after hitting a polished surface.
11: It's speed decrease or increase when go from one medium to other medium.
12: It's Wavelength be very small.
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Replication is used to ensure there is an adequate number of observations in each experimental condition.
<h3>
What is observation?</h3>
Information from a primary source is actively acquired through observation. Observation of living things makes use of the senses. Using scientific tools to perceive and record data is another way that observation can be used in science. The phrase can also be used to describe any data gathered for the scientific endeavor. Observations can be quantitative if a numerical value is assigned to the observed phenomena by counting or measuring, or qualitative if just the existence or absence of a property is documented.
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Answer:
excavation
Explanation:
Excavation retains its central role in field-work because it yields the most reliable evidence for human activities in the past and changes in those activities from period to period.
In archeology, excavation is the procedure by which archaeologists define, retrieve, and record cultural and biological remains found in the ground. It is an important archaeological tool for understanding the processes of the human past. Past activities leave traces in the form of house foundations, graves, artifacts, bones, seeds, and numerous other traces which are helpful in studying the way of life of the people who lived in that era. Excavation helps uncover this remains.