The five key features of tornadoes are formation, speed, vacuums, location and dust devils. They usually form in large thunder clouds. Their internal winds begin to whirl forming a funnel. The speed at which the funnel spins can be 400 km/hr making them the fastest winds on earth. The funnel acts like a giant vacuum sucking up debris and dirt as it goes. They usually only last about 15 minutes but can cover over hundreds of kilometers in that time. The primary location of tornadoes is in the United States in the Mid-Western states. If it develops over sea it is called a waterspout with winds up to 80 kph. In deserts where there is not as much water, small sandstorms known as dust devils are produced by whirling winds.
Major Key Fact: A tornado will sound like a roaring train. It is a deafening roar.
AIDS in Africa: causes for the high spread of the HIV virus
The reasons for the high level of AIDS spread in sub-Saharan Africa are manifold. The most common causes include: Poverty: About half of the world's people living in extreme poverty live in sub-Saharan Africa.
Answer:
50
Explanation:
its between the line of elevation 0 and 100
It's a Sextant
here is a photo of it with full indications
Hope this Helps :)
