Answer: The physical and biological changes that confirm climate warming include the rate of retreat in glaciers around the world, the intensification of rainfall events, changes in the timing of the leafing out of plants and the arrival of spring migrant birds, and the shifting of the range of some species.
Explanation:
<em>Radioactive tracers are useful in </em><em><u>determining medical problems.</u></em>
Answer: <em>B. Determining medical problems.</em>
Explanation:
Radioactive tracers are comprised of carrier particles that are reinforced firmly to a radioactive atom. These bearer particles shift incredibly relying upon the motivation behind the scan.
A few tracers utilize atoms that associate with a particular protein or sugar in the body and can even utilize the patient's very own cells.
Examples of radioactive tracer are - tritium, carbon-11, carbon-14 and oxygen-15 and so forth. Radioactive tracers are either injected in the body intravenously or orally.
Answer:
The temperature of the Sun's middle most layer is 6,000 degrees Celsius to 20,000 degrees Celsius.
Explanation:
- The sun is basically divided into inner and outer layer.
- The inner layer consists of Core, Radiative Zone and Convection Zone.
- The outer layer has Photosphere, chromosphere, transition region and corona.
- The chromosphere is the middle layer that can vary its temperature 6,000 degrees Celsius to 20,000 degrees.
- For most reason the temperature of chromosphere can be taken around 7700 degree Celsius but it varies.
<span>a)there would be a decrease in consumers
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