What is the significance of large percentage of oxygen in Earth's atmosphere?
What will be an ideal response?
According to the way we believe the atmosphere evolved, the oxygen is an indication that life is present.
Physics & Space Science
You might also like to view...
Most meteorites from the inner solar system originate from
A) the Moon B) Mars C) Mercury D) Venus
Physics & Space Science
A light source blinks once per second in its own frame of reference. As you approach the blinking source, you observe the frequency of blinks to be
A) less than 1 Hz. B) 1 Hz. C) more than 1 Hz.
Physics & Space Science
What is the electron configuration for Li, which has 3 electrons?
A) 1s3 B) 1s1 2s2 C) 1s2 1p1 D) 1s2 2s1 E) 1s1 2s1 3s1
Physics & Space Science
The net force always points in the same direction as:
a. the displacement. b. the frictional force. c. the velocity. d. the force of gravity. e. the acceleration.
Physics & Space Science