Answer:
the time taken for the radioactivity of a specified isotope to fall to half its original value.
The half-life of an isotope is used to describe the rate at which the isotope will decay and give off radiation. Using the half-life, it is possible to predict the amount of radioactive material that will remain after a given amount of time.
Explanation:
<span>Relationships
between organisms may be beneficial or detrimental. Which of the
following examples shows a relationship in which both organisms benefit?
</span>
<span>B. An African wasp Certolsolen arabicus pollinates a fig tree Ficus sycomorus as it eats the tree's nectar.</span>
Domain (Specifically domain Eukarya)
When echinoderms move in a manner such as walking or crawling, they pump sea water through a series of internal body canals. The water is used to inflate some of the tube feet, causing them to expand. In many species, the tube feet are equipped with suc(k)ers that grip onto the sea floor.
Answer:
a dwarf star
Explanation:
hope this helps!!! I haven't taken Earth science in a while but I know that you can find this in the reference tables.