Physics - Checklist Flashcards
What is meant by geocentric?
A model of the Solar System that places the Earth at the center
What observations led to our present model of the Solar System?
Various astronomical observations including planetary motions
What is the age of the Solar System?
Approximately 4.6 billion years
What theory explains how the Universe started?
The Big Bang theory
What are the types of orbits a satellite can take?
Geostationary, polar, elliptical
What are some uses of satellites?
Communication, weather monitoring, GPS, Earth observation
What is the Big Bang?
The event that marks the beginning of the Universe
What is one risk and one benefit of the space programme?
Risk: High cost; Benefit: Technological advancements
What is one use of telescopes?
To observe distant celestial objects
What are the two types of telescope?
Refracting and reflecting telescopes
What conditions are required for life like that on Earth to exist?
Presence of water, suitable temperature range, atmosphere
How do astronomers search for life on other planets?
By studying exoplanet atmospheres and conditions
What is the heliocentric model of the Solar System?
A model that places the Sun at the center
What is an observation that could not be explained by the geocentric model?
Retrograde motion of planets
What is the importance of evidence in developing the heliocentric model?
It provides a basis for validating the model’s accuracy
Why could atoms not be formed immediately after the Big Bang?
The Universe was too hot and dense
How is the Big Bang theory supported by evidence?
Cosmic microwave background radiation and redshift of galaxies
What are the benefits of the space programme?
Scientific discovery, technological innovation, international collaboration
How does one type of telescope work? (Fill in the blank)
A ray diagram can explain how a _______ telescope works
How do astronomers compare the orbits of different satellites?
By analyzing their trajectories and altitudes
How do astronomers compare the different uses of satellites?
By evaluating their applications in various fields
