When a certain amount of water is heated up, it expands, increasing in volume changing the density. This goes for when it’s heated or cooled; the density then changes.
Answer:
Polar region, area around the North Pole or the South Pole.The northern polar region consists mainly of floating and pack ice, 7–10 feet (2–3 m) thick, floating on the Arctic Ocean and surrounded by land masses.
Answer:
<u>Statement no 1 is true</u>. A primary response occurs when an antigens invades the body for the first time. B cells and T cell are activated to generate a response.
<u>Statement no 2 is true</u>, the B cells form plasma cells and memory cells during a primary response.
<u>Statement 3 is false</u>. A secondary response is faster than the primary response. When a pathogen invades the body again, the immune system already has memory cells for this pathogen. These memory cells will generate a quick response.
<u>Statement no 4 is true</u>. During a secondary response, the plasma cells will make more plasma cells and will also make memory cells as the pathogen might invade again.
Answer:
Absolute dating(also known as radiometric dating) is based by the measurement of the content of specific radioactive isotopes of which the "half time" is known. ... Relative dating instead allows for identifying the sequential order of geological events one relative to the other.
Explanation:
A. Regularly test the water in residents' homes
Explanation:
The best way to have kept the water quality in check would have been to constantly and regularly test the water in residents' homes.
Lead is used in making pipes due to its very unique properties and availability. Over time, lead can enter the water it is carrying in dissolved form.
Increasing amount of lead in the water will eventually become toxic when an anomalous concentration is reached.
The best way to monitor the trend is to simply check the water in residential homes from time to time for dissolved lead.
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Chemistry of lead brainly.com/question/5852049
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