Answer:
Human activity - Produces greenhouse gasses.
Greenhouse gasses - Cause atmosphere to trap more heat.
Sun's output - Can vary.
Ice age - Peaked 20,000 years ago.
Explanation:
Human activity includes the usage of fossil fuels on a very large scale, and by using them we release huge amounts of greenhouse gasses into the atmosphere.
The greenhouse gasses have the ability to trap the heat that is reflected from the surface of the planet, thus keeping more of it in the atmosphere and causing global temperature rise.
The sun is technically a star, thus an object that produces energy and light, and like every star, it has variations in its activity in accordance with the processes going on on it.
There have been numerous ice ages through the geological past, and the last one of them ended only around 10,000 years ago, with its peak being just 20,000 years ago.
Answer:
Stretching from Canada to Mexico, the
✔ Rockies
are the longest mountain range in the United States.
The Rio Grande, Missouri, and Mississippi are major
✔ rivers
in the United States.
The United States is bordered by the
✔ Atlantic Ocean
to its east.
Explanation:
1. B
2. C
3. B
Answer:
B. when they impact Earth.
Explanation:
- Asteroids are minor planet type rocky masses that are broken off and found in the inner solar system and also been called the inner planetoids as they are orbiting around the sun. They are similar to comets based on surface features.
- Computerized methods are used to find out the presence of asteroids in the shy. The asteroid belt has tended to evolve in the nebula formation of the sun with the presence of heavy metals sinking in the ice cores leaving the rocky mineral in the crust. They are almost 1000 km to 1 meter wide and can be large as miniature planets
- However waste the majority of them are irregular in the shade the three largest asteroids are Ceres, Vesta, and Pallas that form a type of the dwarf planet.
The answer is b, the Great Plains are in America
Global warming, as carbon dioxide is a major contributor to the earth’s atmosphere getting warmer.
