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Question:
What is the second most abundant gas in the atmosphere?
A
Oxygen
explanation
Oxygen represents 21% of the Earth’s atmosphere, and nitrogen is about 78%. The remaining 1-2% is made up of carbon dioxide, argon, and helium.
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PN78999
3 years ago
Each practice sections give explanations of each question after every question. Commercial shows up after each section/ module, which is fine with me. It probably help them offset in maintaining the app. This is a 100% free apps with a lot sections and practice quizzes.
Glxglskstky
3 years ago
This app is great because it contains various types of information that will be tested on the real ASVAB, I recommend this app greatly
Tennismxer
3 years ago
So far so good, their are a few errors here and there, but the apps interface and functionality is very smooth and easy to use!