Lewis Nixon invented the first sonar-like listening device to detect icebergs. During World War I (1914-18), a need to detect submarines increased interest in sonar. The U.S. military began using the term "sonar" during World War II.
Answer:
field studies
Explanation:
The documentation and collection of descriptive details of events in nature such as amounts, sizes, colors, smell , behavior, texture e.t.c are all categorized as field studies.
It involves the gathering of raw data outside a laboratory.
- Often times, based on the needs of an experiment, it is desirable to corroborate laboratory studies with field evidences.
- The approach in gathering such data varies from discipline to discipline.
- Most field sampling are usually done in an uncontrolled environment.
Answer:
genes are part of the DNA that contain traits from ur biological parents that basically make u who u r