Distance between objects in the solar system is usually measured in astronomical units.
Answer:
Rank of the stars from shortest to longest distances:
Barnard's Star (M4)
61 Cygnia A (K5)
Alpha Centauri A (G2)
Sirius (A1)
Spica (B1)
Explanation:
The habitable zone, also known as the circumstellar habitable zone, is the range of distances from a star where it is not too hot and not too cold for liquid water to exist on the surface of surrounding planets.
The location of a star’s habitable zone is dependent upon its luminosity, which is the amount of light emitted by an object in a unit of time, because a star’s luminosity increases with time; and also the star's mass.
The inverse square law of light brightness can be used to determine the extent of the habitable zones for different luminosity stars with the formula:
star boundary = Sun boundary × squareroot[(star luminosity)/(Sun luminosity].
Answer:
Among the 'macro-factors', the inadequate human and economic development of the origin country, demographic increase and urbanization, wars and dictatorships, social factors and environmental changes are the major contributors to migration. These are the main drivers of forced migration, both international or internal.
Explanation:
Answer:
b
Explanation:
that the only part i know sorry i hope this helps
Answer:
Stomata- specialized cells that contract and expand to open or close pores for ____gas exchange_____. Stomata can adjust to temperature, staying ____closed______ when temperatures are hot and dry to prevent gas and water loss. Would you expect to see more stomata in a tropical region or dry region
Explanation:
Stomata cells are used by plants for gas exchange and normally present at the under surface of the leaves and sometimes on green stems.