Answer:
prostitution
Explanation:
Occupations such as farming, tool making, and carpentry emerged as a result of first human creations such as tools and agriculture. According to some research reports prostitution was considered as the oldest job in the history of mankind.
Answer:
This test uses formaldehyde and sulfuric acid. The solution will turn purple when introduced to heroin, morphine, or other opium drugs.
Explanation:
Earth would move straight forward through the universe, but the Sun exerts a constant pull on our planet. This force bends Earth's path toward the Sun, pulling the planet into an elliptical (almost circular) orbit. His theories also made it possible to explain and predict the tides.