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Today, we observe that * 1 point the universe is expanding, but that expansion is slowing. the universe is expanding, but that expansion is increasing. the universe is not expanding or contracting. the universe only contains forms of energy that we understand. * Over large distances in the universe, (please check all that apply) 1 point the universe is very close to flat. the universe has obvious spherical geometry. matter and energy are almost perfectly evenly distributed. matter and energy are not evenly distributed at all.

Dark energy * 1 point constitutes about 75% of the energy of the current universe, but we do not know what it is. constitutes about 75% of the energy of the current universe, and we can fully explain it. constitutes only a tiny fraction of the energy of the current universe, but we do not know what it is. causes galaxies to rotate too quickly. Which of the following is not a prediction made by the Big Bang model? · 1 point The universe is expanding, and has been for about 14 billion years. There exists radiation left over from the Big Bang, which we call the Cosmic Microwave Background Radiation, that we find everywhere we look. The matter and radiation in the universe are evenly distributed over large distances. Nuclei were formed within about 20 minutes of the Big Bang.

Cosmic inflation * 1 point is the hypothesis that, in the early universe, there were no atoms. is the hypothesis that, in the early universe, there was a brief but extreme period of expansion. is a theory which has supplanted the Big Bang model. is the hypothesis that, in the early universe, there was a period of contraction.

* The Big Bang model states that (please check all that apply) 1 point all elements heavier than helium were produced in the early universe. the universe has been expanding for about 14 billion years. O hydrogen and helium were produced in the early universe, in about a 3:1 ratio (by mass). the universe has been contracting for about 14 billion years.

* The earliest evidence for dark matter was 1 point the fact that the edges of spiral galaxies seemed to be rotating too slowly. the fact that the edges of spiral galaxies seemed to be rotating too quickly. the fact that not all galaxies in the universe are spiral galaxies. the discovery of the top quark.

This picture represents 1 point 21 21 요 L2=1 MAP990006 the three different types of geometry that the universe may have, according to Einstein's theory of gravity. From observing our universe, we can tell that our geometry is like the bottom one. three different types of gravity that might exist. the three different types of geometry that the universe may have, according to Einstein's theory of gravity. From observing our universe, we can tell that our geometry is like the middle one. three different types of gravity that might exist. Our universe has the top one.