Temperature plays in important part in most chemical reactions. Generally speaking,
the higher the temperature, the higher the rate of reaction due to the increased
amount of energy available as well as an increase in particle contact.
Suppose a chemical reaction was discovered in which temperature was not relevant
at all. An experiment was devised where all other factors were allowed to vary -
pressure, number of particles, etc. - and the temperature was increased from 10°C to
50°C while the rate of the reaction was measured.

answercells,tissues,organs,organ,system-organism;

levels of biological organization; organism,population,community,ecosystem,biome,biosphere,

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1) a giant star is a star with a radius much larger than that of our sun (even hundreds of times bigger). they can be either blue giants or red giants: in the first case, the surface temperature is very high, higher than that of the sun, while in the second case the surface temperature can be lower than that of the sun. the same applies to the mass: blue giants are very massive stars, burning quickly their nuclear fuel, while red giants can have small masses (a little bit bigger than that of our sun).

2) we can find giant stars in the upper part of the hr diagram, blue giants will be on the upper left corner since they have high luminosity and high temperature, while red giants will be on the upper right corner, having high luminosity but low temperature.