[Answered] Stromatolites date back to approximately A) 4.6 billion years ago B) 3.5 billion years ago C) ...

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Author Question: Stromatolites date back to approximately A) 4.6 billion years ago B) 3.5 billion years ago C) ... (Read 77 times)

eruditmonkey@yahoo.com

Hero Member
Posts: 546

on: Jul 27, 2018

Stromatolites date back to approximately

A) 4.6 billion years ago
B) 3.5 billion years ago
C) 3.85 billion years ago
D) 4.0 billion years ago

Question 2

An up quark (u) has a charge +2/3, and a down quark (d) has a charge of -1/3. Which of the following describes a proton?

A) uuu
B) uud
C) udd
D) ddd

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AmberC1996

Sr. Member
Posts: 317

Reply #1 on: Jul 27, 2018

Answer to Question 1

B

Answer to Question 2

B

eruditmonkey@yahoo.com

Member
Posts: 546

Reply 2 on: Jul 27, 2018

Excellent

AmberC1996

Member
Posts: 317

Reply 3 on: Yesterday

Thanks for the timely response, appreciate it

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