aura farm
What do scientists call the study of the universe as a whole, including its origin, structure, and evolution?
Cosmology
What did Edwin Hubble's observations provide evidence for?
The expansion of the universe/ expanding universe
What is the most widely accepted theory of solar-system formation?
Nebular Hypothesis, Nebular Theory, Solar Nebular Theory
Where do many long-period comets originate?
Oort Cloud
Who is known for proposing in 1927 that the universe was expanding from an extremely dense beginning?
Georges Lemaitre
Approximately how old is the universe?
13.8 billion years
Where is the main asteroid belt located?
Between Mars and Jupiter
What process is the main focus of the Nebular Hypothesis?
Condensation of material in a gaseous nebula.
What is another name for the habitable zone?
Goldilocks Zone
Which scientist developed equations from General Relativity that allowed for an expanding or contracting universe?
Alexander Friedmann
What is the universe?
Everything that exists, including space, time, matter, and energy.
What is the approximate orbital period of Halley's Comet?
75-76 years
Who proposed Planetesimal Theory in 1941?
Viktor S. Safronov
Who was Arno Penzias' collaborator in the discovery of the Cosmic Microwave Background?
Robert Wilson
Which theory of universe formation would have difficulty explaining a universe that clearly changes over time?
Steady State Theory
What observation by Edwin Hubble provided evidence that the universe is expanding?
He observed that distant galaxies were moving away from us.
What type of matter is proposed to be continuously created in the Steady State model?
Hydrogen
What is the main difference between the Nebular Hypothesis and Planetesimal Theory?
The Nebular Hypothesis emphasizes condensation of a gaseous nebula, while Planetesimal Theory emphasizes collision and accumulation of material.
Why does the Philippines experience significant tectonic activity?
The Philippines is associated with the Pacific Ring of Fire and several tectonic plate boundaries.
How are Cosmic Inflation and the Big Bang model related?
Cosmic Inflation describes extremely rapid expansion during the earliest moments of the universe and helps explain certain problems associated with the early universe within the broader Big Bang framework.
Who were associated with the development of the Steady State Theory?
Fred Hoyle, Hermann Bondi, Thomas Gold
A researcher finds a rocky object orbiting the Sun between Mars and Jupiter. It does not show a coma or tail. What classification is most appropriate?
Asteroid
A proposed solar-system formation scenario involves material being pulled from the Sun by another massive object and later forming planetesimals. Which theory does this represent, and what feature of the theory identifies it?
Tidal Theory; it is identified by the near encounter of a massive object with the Sun and the resulting material pulled from the Sun.
Name several characteristics that contribute to Earth's habitability.
Suitable distance from the Sun, liquid water, protective atmosphere, moderate greenhouse effect, magnetic field, plate tectonics, stable climate, and rich biodiversity.
What evidence supports the idea that the universe has changed over time?
Evidence includes the expansion of the universe, Cosmic Microwave Background, abundance of light elements, and galaxy evolution.