The scientist first designed thee geologic time scale because.... the people who needed to understand the geological relationship of different rock units were miners. Mining had been of commercial interest since at least the days of the Romans, but it wasn't until the 1500s and 1600s that these efforts produced an interest in local rock relationship.
The fuel cells are what powers up the spacecraft with regards to its different operations like regulating breathable oxygen and making pot water. The famous incident that the fuel cells got leaked was in the Apollo 13. Their quest to the moon has come to an end when their fuel cells had gone insufficiently to continue the voyage.
Answer:
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Explanation:
An ore is a naturally occurring solid material from which a metal or valuable minerals can be extracted profitably. They are found from underground which means you have to dig then out.
They are like silvers and gold
Nigeria is very hot, if you see pictures of Nigeria you can see how the sun is shining very brightly on the houses and on people. Their color of their skin are adapted to support the sun hot temperature.
