Rust is caused when there is a redox reaction of iron and oxygen in the existence of water or air moisture. For the metal to be weakened by rust, the oxygen atoms needs to be mixed with metallic atoms to form the oxygen compound.
PSAT stands for Preliminary SAT, where SAT is the Scholastic Aptitude test. It is a standardized test that allows for a nation-wide comparison of students. The results of the test are relevant for the National Merit Scholarship program.
Answer:
People should use minimum water for daily needs, such as washing cars and utensils. Whenever you see open taps, you should immediately go and close them properly to save water. The simple ways to save the environment will help you know more. Apart from water, steps must also be taken to save natural gas.
Answer:
Africa is the birthplace of humankind
Explanation:
Places like South Africa and East Africa is considered to be the birthplace of humankind. The idea that human evolution in Africa was given by Charles Darwin. Africa is also known as the cradle of Humankind. Fossil of early humans has been found in this region in a vast region that indicates the early human evolution.
To stop the north korean invasion of south korea
