the disks of spiral galaxies appear blue because:
spiral galaxies are still undergoing star formation
Hope this helps:)
Answer:
Landscapes have economic value because the owners of the land or the area have many visitors coming and going and they can put up shops etc to get money
Explanation:
Answer:
volcanoes and erosion
Explanation:
both could be right but im sure of volcanoes
Answer: Carbon
Explanation:Carbon is the element released by volcanic outgassing,animal respiration and flatulence,burning of fossil fuels and the metamorphism of limestone.
Volcanic outgassing is the release of carbon into the atmosphere mainly in the form of carbon monoxide.
Animal respiration and flatulence are process taking place in animals which leads to the release of carbon dioxide.
Burning of fossil fuels is the use of heat to breakdown fossil fuels such as petroleum leading to the release of Carbon.
Limestone metamorphism is the breakdown of limestone which leads to the release of Carbon to the atmosphere.
