define dark matter and dark energy quizletmauritania pronunciation sound

And dark matter’s influence shows up even in individual galaxies, while dark energy acts only on the scale of the entire universe Our universe may contain 100 billion galaxies, each with billions of stars, great clouds of gas and dust, and perhaps scads of planets and moons and other little bits of cosmic flotsam. The Universe is full of matter and the attractive force of gravity pulls all matter together. 26) Which of the following are candidates for dark matter? D) Dark energy exists but dark matter does not. 11) Which of the following statements best summarizes current evidence concerning dark matter in individual galaxies and in clusters of galaxies? 8) How does gravitational lensing tell us about the mass of a galaxy cluster? 6) How do we know that galaxy clusters contain a lot of mass in the form of hot gas that fills spaces between individual galaxies? 7) Why does the temperature of the gas between galaxies in galaxy clusters tell us about the mass of the cluster? A type of matter hypothesized to account for a large part of the total mass in the universe. 13) Based on current evidence, how does the actual average density of matter in the universe compare to the critical density? 10) When we say that a cluster of galaxies is acting as a gravitational lens, what do we mean? 3) The text states that luminous matter in the Milky Way seems to be much like the tip of an iceberg. 13) What do we mean when we say that particles such as neutrinos or WIMPs are weakly interacting? 24) What do we mean when we say that a particle is a weakly interacting particle? 2) Which of the following best summarizes what we mean by dark energy? Dark matter cannot be seen directly with telescopes; evidently it neither emits nor absorbs light or other electromagnetic radiation at any significant level.Is dark matter a form of dark clouds of normal matter/No, it is not bayrons, a type of particle.

This refers to the idea that 8) In general, when we compare the mass of a galaxy or cluster of galaxies to the amount of light it emits (that is, when we look at it mass-to-light ratio), we expect that9) Which of the following is not one of the three main strategies used to measure the mass of a galaxy clusters? C) Neither dark energy nor dark matter really exist. B) Dark energy does not exist and there is much more dark matter than we are aware of to date. A type of matter hypothesized to account for a large part of the total mass in the universe. We know because we would be able to detect baryonic clouds by their absorption of radiation passing through them.No, it is not antimatter/ We do not see the unique gamma rays that are produced when antimatter annihilates with matter.In the early 1990's, one thing was fairly certain about the expansion of the Universe.

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