the disks of spiral galaxies appear blue because:
spiral galaxies are still undergoing star formation
Hope this helps:)
Answer:
Explanation:
Desertification:
The process of the land degradation in arid , semi - arid , and sub - humid areas because of the factors , human activities , climatic variations .
This process lead to persistent degradation of the dry land and ecosystem because of some variation in climate and man - made activities .
The major cause of Desertification are -
1. Overpopulation
2. Overgrazing
3. Deforestation
4. Unsustainable agriculture techniques
5. Climate change
6. Stripping of land resources .
7. Overgrazing of the land by the cattle and wild stock.
Answer:
Because Egyptians believed that this life is just one phase that lead to the one that starts after we die. That is why pharaohs and important persons were mummified so their body would be preserved to continue the road. They were put in pyramids, because they were built to be their tombs.
Explanation:
Process of mummification was a complex process which usually lasted for 17 days. Everything had to be well-planned and people who were involved in this process were to be very careful. Pyramids that were built as burial places actually presented greatness and importance of pharaoh that was to be buried in them.
