Answer:
Hydrogen in the core of the star is converted to helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes unstable and contracts.
Answer:
Explanation:
Perimeter: perimeter is measured by the length of the shape around. The area of the shape is mostly the exact amount of a two dimensional shape that it covers. The ratio of the perimeter to the area is just the perimeter divided by the area.
The correct answers are:
- Polar ice caps would melt, increasing sea levels;
Because of the rise of the temperatures, the permafrost, glaciers, and polar ice caps would mostly melt. As they melt, they will increase the sea levels significantly because they will introduce much more water into the the seas and oceans.
- Wildlife would have to migrate or die;
With increasing sea levels, as well as change of habitats, lot of animals would find themselves in situation where they will have to migrate, because if they don't, they will find themselves in water and drown, or starve to death.
- Hurricanes and typhoons could increase in intensity;
Because the water in the sea levels will increase, and the water bodies will become even bigger, the hurricanes and typhoons will be able to become stronger and more intense, thus be more destructive as well.
Answer: How explosively or quietly a volcano erupts is not affected by the:
C) concentration of dissolved gases in the magma.
Explanation: Therefore, when a volcano is explosive or less explosive, is as a result of the composition of magmas in different areas or location.
