Answer: the core of the earth heats up the more dense part of the mantle making it less dense.<em> </em>When the less dense part of the mantle rises, the more dense part of the mantle falls, and cools off. This motion continues creating convection currents
let u=speed of flow
A x v = n x a x u then u = A x v/ n x a
Answer:
A
Explanation:
the larger the size means the lower the porosity
The answer to this is Human immunodeficiency virus.
Answer:
Harmful effects of microorganisms:
Bacteria: Causes various diseases such as typhoid, diarrhea, and cholera.
Fungi: Causes a large number of diseases in plants and in animals such as rust diseases in plants, fruit rot in apple, red rot in sugar cane and ring worm disease in human beings.
