Every river and it's flow has source and mouth: source is the part of the flow of the river- the place where the river starts and mouth is the part where the river flows into a sea or lake.
Answer:
Weathering, erosion, and deposition are processes that act together to wear down and build up the Earth's surface. These processes have occurred over billions of years. Weathering is any process that breaks down rocks and creates sediments. There are two forces of weathering, chemical and mechanical (physical).
Explanation:
Answer:
Explanation: A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate. Every dune has a windward side and a slipface.
Answer: b. Asteroids can cause great damage if they collide with Earth.
Explanation:
The main idea is that asteroids can cause great damage to earth if they collide with our planet. This is what the entire article was centred around starting with an example of the effects of the last time there was a collision with Earth.
It then goes forward to talk about the chances of being hit by another asteroid and what scientists will do if the Earth is at risk of being hit by one which shows that the whole point of the article is the damage asteroids can cause on earth and why this should be avoided.
