For Absolute dating they assign a numerical date to each rock layer studied
For relative dating they go Through geological dating and stratigraphy processes. Also, they use Uranium Dating.
SI units are a modern form of the metric system.
He played an important role in the industrial revolution by "making steam engines a reliable power source."
Explanation:
James Watt was an architect and mechanical engineer whose developments in steam engine technology inspired the Industrial Revolution. Watt did not discover the steam engine. Steam engines were previously in survival, mainly being used to elevate water out of mines.
Magma and methane or both liquids because hamsters and toe nails will definitely not be liquids
Heat from the core
Outter and inner core