Scientists Use Radioactive Dating for wich of the Following
A-Identifying the relative ages of rock layers
B-**determinating the absolute ages of rocks**
C-telling how radioactive substances are
D- collecting evidence of fossils
Wich of the following periods are in order from smallest to largest
A-epoch,period,era
B-epoch,era,period
C-**period,era,epoch**
D-epoch,period,era
Earth's first atmosphere was mainly composed of wich of the following gasses
A-Hydrogen, Helium
B-**Carbon dioxide, oxygen**
C-nitrogen,oxygen
D-carbon monoxide, ozone
I agree after googling
https://www.google.com/search?q=early+earth+atmosphere+composition&ie=utf-8&oe=utf-8&client=firefox-b-1-ab
Do you agree with all of them or just the Carbon one? Also I googled it too and it did say hydrogen and helium as well, so i'm kind of getting mixed answers
I certainly agree with the first two.
I can not do better than just Google the last one.
Kk thanks Damon :)
To determine which option is correct for each question, let's break down the questions and analyze each statement:
1. Scientists Use Radioactive Dating for which of the Following?
The correct answer is B - determining the absolute ages of rocks.
Explanation: Radioactive dating, also known as radiometric dating, measures the abundance of certain isotopes in rocks and minerals to determine their absolute ages. This method is based on the concept of radioactive decay, where isotopes of elements decay over time at a constant rate.
2. Which of the Following Periods Are in Order from Smallest to Largest?
The correct answer is C - period, era, epoch.
Explanation: In the geological timescale, the hierarchy of periods, eras, and epochs follows a specific order from largest to smallest. Therefore, starting from the smallest to the largest would be epoch, period, era.
3. Earth's First Atmosphere Was Mainly Composed of Which of the Following Gases?
The correct answer is B - carbon dioxide, oxygen.
Explanation: According to scientific research, the Earth's first atmosphere was primarily composed of gases like carbon dioxide (CO2), water vapor (H2O), nitrogen (N2), and small amounts of other gases, including methane (CH4) and ammonia (NH3). Free oxygen (O2) was not present in significant quantities at that time, as it was produced later through biological processes.
By understanding the explanations provided, you can find the correct answers to the questions.