Geography, 06.12.2019 03:31 mixcolin0002
Earth probably formed years ago, and the first life evolved as early as years ago. hint: because fossils of bacterial communities have been discovered that are 3.5 billion years old, it is reasonable to assume life originated around 3.9 billion years ago.
a. 3.9 million years ago 2.0 billion years ago
b. 10 billion years ago 4.5 billion years ago
c. 4.5 billion years ago 3.9 billion years ago
d. 6,000 years ago 6,000 years ago
e. humans observed neither event, so there is no way to tell.
Answers: 1
Geography, 23.06.2019 11:20, breezyalanah
You have been tasked with sorting the rock samples shown into three categories, with two rocks in each category. what attribute would you use to sort these rocks? which rocks would be in each category? rocks: obsidian, coquina limestone, granite, soapstone, pumice, and gneiss.
Answers: 2
Geography, 23.06.2019 11:30, marcustuo1
Fertility and mortality rates are higher in more developed nations.
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