DSST DSST Astronomy Flashcards

The CMB is the residual heat from the Big Bang, detectable in the universe's microwave radiation.

This concept is crucial for understanding the Big Bang Theory and the universe's origins. The CMB is a key evidence for the Big Bang model.

Galaxies move away from each other faster, driven by Dark Energy.

This scenario tests understanding of the Expansion of the Universe and Dark Energy's role. Accelerating expansion is a key concept in cosmology.

False. Dark Matter attracts, while Dark Energy repels, driving the universe's acceleration.

This common misconception must be clarified to understand the distinct roles of Dark Matter and Dark Energy in cosmology. The distinction is vital for the exam.

The Big Bang Theory describes the universe's origin and evolution, while the Steady State Theory proposes a constant, unchanging universe.

This comparison is essential for understanding the fundamental concepts of cosmology and the Big Bang Theory's significance. The Steady State Theory is an outdated alternative.

Dark Energy is a mysterious, repulsive force driving the universe's accelerating expansion.

Understanding Dark Energy is critical for explaining the universe's observed expansion and the Fate of the Universe. Dark Energy's nature remains a topic of ongoing research.

Invisible matter that doesn't emit light, making up 27% of the universe's mass-energy.

This concept is crucial for understanding the universe's structure and evolution, and is a key topic in the DSST ASTRONOMY exam. Students often struggle to distinguish Dark Matter from Dark Energy.

False. It supports the Big Bang Theory.

This question targets a common misconception, as students may confuse the Cosmic Microwave Background's significance. The correct answer demonstrates understanding of the Big Bang Theory's evidence.

Dark Matter attracts, while Dark Energy repels, driving the universe's acceleration.

This question evaluates the ability to distinguish between two closely related but distinct concepts in Cosmology. Students often struggle to understand the contrasting roles of Dark Matter and Dark Energy.

The universe began as a singularity, expanding rapidly around 13.8 billion years ago.

This question tests recall of a fundamental concept in Cosmology, which is essential for understanding the universe's origins and evolution. The Big Bang Theory is a cornerstone of modern astronomy.

A mysterious force driving the acceleration of the universe's expansion.

Understanding Dark Energy is essential for grasping the dynamics of the universe's expansion and its ultimate fate, making it a critical concept for the exam. Students must be able to define and explain Dark Energy's role.

Galaxies will move away from each other at increasing speeds, potentially leading to a 'Big Rip'.

This question assesses the student's ability to apply their knowledge of the universe's expansion to predict its potential fate, a key concept in cosmology. It requires understanding the implications of Dark Energy's influence.

A mysterious force driving the universe's accelerating expansion.

This concept is crucial for understanding the fate of the universe, and students often struggle to distinguish it from Dark Matter. Mastering this definition is essential for the DSST ASTR 4 COSMOLOGY exam.