whats the name of the chemical
Au
Gold
what is the second layer of the earth
mantle
what is a ecosystem
a community of interacting living organisms and their non-living environment
Ra
Rubidium
what is the longest layer of the earth
the mantle
what is a atom
the smallest unit of an element, and the basic building block of all matter
CO2
Carbon dioxide
what layer is after the mantle
the core
what happens to the human body after you die
After death, a human body undergoes a series of physical changes, including cooling, rigor mortis, and eventually decomposition
boron
what layer is the hottest
the inner core
Al2O3
aluminum oxide
how long is the mantle
1,790 miles