If we keep on using fossil fuels the earth will become hotter and we will have no more left.we will end up using all of our resources.
another theory is that the sun will one day stop and shut down.with out the sun there will be no more humans,solar system,water or plants.and life on earth will stop.<span />
The nucleolus disappears. Centrioles begin moving to opposite ends of the cell and fibers extend from the centromeres. Some fibers cross the cell to form the mitotic spindle. The nuclear membrane dissolves, marking the beginning of prometaphase.
Answer:
True
Explanation:
The model of the universe developed by Nicolas Copernicus gave better predictions than the model of Ptolemy. The model of Ptolemy had prevailed for centuries, and it placed the Earth at the center of the universe. However, Copernicus accurately established that the sun was located at the center of the solar system. Moreover, Copernicus also established that the Earth is only one of many planets, that the Sun is stationary and that the Earth moves in three different ways (daily, annual, and annual tilting), among other astronomical principles.
Answer: Please refer to Explanation
Explanation:
Undernourishment
This is defined as being unable to take the required amount of food and nutrients for energy that the body needs per day. This has to have gone on for a year for it to be classified as Undernourishment.
Desertification
This refers to a situation where land that was once fertile looses that fertility and instead begins to become more desert like. This is very prevalant in the Sahel region of Africa and can be caused by droughts and inefficient farming practices.
Food Security
This is defined as the access to sufficient, safe, and nutritious food at all times needed to be able to sustain the human body by meeting the minimum amount of recommended energy that the body requires to function.
The Sahel is an area immediately south of the Sahara Desert. It is semi-arid in nature and is prone to prolonged periods of drought.
When this drought occurs it tends to cause soil that was once fertile to begin to turn into a desert like soil due to the soil not getting water for such a prolonged period of time.
When there is a lot of fertile land used for farming lost to desertification then the people in those areas cannot farm and get food needed to survive. This causes Food Security issues because people do not have access to food that they require to survive.
Should this happen and the people there go through Food security crisis, they will become undernourished as they are unable to take the recommended amount of food necessary.
