How did dark matter affect the development of structures in the early universe?(1 point) Responses It seeded the development of galaxies. It seeded the development of galaxies. It seeded the development of quasars. It seeded the development of quasars. It became part of black holes. It became part of black holes. It cooled pockets of gas to form nebulae.
It cooled pockets of gas to form nebulae.
Which is evidence for the existence of dark energy?(1 point) Responses Galaxies that are rotating at a constant rate. Galaxies that are rotating at a constant rate. Pulsars that seem to be moving closer at an accelerating rate. Pulsars that seem to be moving closer at an accelerating rate. Supernovae that are moving away at an accelerating rate. Supernovae that are moving away at an accelerating rate. Black holes that are expanding at a constant rate.
Supernovae that are moving away at an accelerating rate.
Question How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.(1 point) Responses The percentage of ordinary matter has grown in scientists' estimates. The percentage of ordinary matter has grown in scientists' estimates. The percentage of dark matter has shrunk in scientists' estimates since the 1980s. The percentage of dark matter has shrunk in scientists' estimates since the 1980s. The percentage of dark energy has shrunk in scientists' estimates. The percentage of dark energy has shrunk in scientists' estimates. The percentage of unknown material has grown in scientists' estimates since the 1970s.
The percentage of ordinary matter has grown in scientists' estimates.
The percentage of unknown material has grown in scientists' estimates since the 1970s.
Dark matter affected the development of structures in the early universe by seeding the development of galaxies.
Dark matter played a significant role in the development of structures in the early universe by seeding the formation of galaxies. The presence of dark matter influenced the gravitational pull in regions of higher density, causing ordinary matter (gas and dust) to accumulate and eventually form galaxies.
To get to this answer, you can begin by understanding the basic concept of dark matter. Dark matter is a form of matter that does not emit, absorb, or reflect light, making it invisible to our current instrumentation. However, its presence can be inferred through its gravitational effects on visible matter.
Studies and observations have shown that galaxies are surrounded by vast halos of dark matter that provide the necessary gravitational force to hold these galaxies together. The theory suggests that dark matter began to clump together in the early universe due to fluctuations in the density of the primordial soup of particles and radiation. These clumps of dark matter acted as seeds for the formation of galaxies.
So, in summary, dark matter affected the development of structures in the early universe by acting as seeds for the formation of galaxies through its gravitational influence on ordinary matter.