What does this figure tell us?
A) The current level of carbon dioxide in our atmosphere is higher than it has been at any time during the past 800,000 years.
B) Earth is now warmer than it has been at any time during the past 800,000 years.
C) The current level of carbon dioxide in our atmosphere can be attributed to natural changes in Earth's climate.
D) The level of carbon dioxide in our atmosphere changes randomly with time, so there is no way to predict how it will change during the next century.
E) The current level of carbon dioxide in the atmosphere and the global average temperature are both higher today than at any other time during the past 800,000 years.
A) The current level of carbon dioxide in our atmosphere is higher than it has been at any time during the past 800,000 years.
You might also like to view...
The ____________________ of a black hole in a binary system can emit X-rays and allow us to detect the presence of the black hole
Fill in the blank(s) with correct word
A bar magnet that holds a chain of nails illustrates
A) magnetic field displacement. B) magnetic induction. C) electromagnetic induction.
In chemistry and physics, what is a mole?
a. The number of grams of an element that equals its mass in atomic mass units. b. The number of ounces of an element that equals its mass in atomic mass units. c. The number of molecules of an element in a liter. d. The number of atomic mass units of an element in a liter of its gas. e. The number of atoms of an element in a liter.
Consider again the civilization described in the previous question. (They live on a planet orbiting 10 AU from a close binary star system that consists of a 15 MSun red giant star and a 10 MSun black hole surrounded by an accretion disk)
One foolhardy day, a daring individual in their space force (let's call him Major Tom) decides to become the first of his species to cross the event horizon of the black hole. To add to the drama, he decides to go in wearing only a thin space suit, which offers no shielding against radiation, no cushioning against any forces, and so on. Which of the following is most likely to kill him first (or at least to start the process of killing him first)? A) tidal forces due to the black hole B) X-rays from the accretion disk C) the crush of gravity at the singularity embedded within the black hole D) the sucking force from the black hole, which will cause his head to explode