Copernicus quietly suggested that the Earth moved around the Sun, but this person boldly promoted the heliocentric view in the 1600s and played a major role in the scientific revolution.
Who is Galileo Galilei?
100
Early 20th century
When did we first begin to understand the expanding nature of U?
100
The moon formed from a big splat of material which blasted out of proto-Earth's mantle and crust upon impact of a small planet-sized object during the period of the Great Bombardement.
What is the Giant Impact Hypothesis?
100
The Geological Society of America said...
THEY KNOW WHAT'S GOING ON WITH THE CLIMATE. HUMANS MESSING THINGS UP. REDUCE GHG.
100
A light year is a measure of...
What is distance?
200
The U described by Einstein differs from that described by Newton. Which one described a "clockwork U" meaning it was like a clock wound by God?
Who is Isaac Newton?
200
About 13.8 billion years
What is the estimate of the age of the U?
200
In the early U
What is the Period of the Great Bombardment?
200
The presence of O3 in the troposphere is...
What is a pollutant?
200
From the light they emit, we know what?
What are stars made of?
300
First observed the redshift in distant galaxies.
Who is Edwin Hubble?
300
About 66%
What is the % of population in the US that can't see the night sky well enough from their homes to distinguish Milky Way?
300
One effect the moon has on Earth is to produce higher tides than would exist w/o moon. Moon also controls the wobble of Earth and stabilizes the climate. W/o moon, life may not have come to exist.
What is truth?
300
Process changed the primitive atmosphere of the E by starting the oxygen revolution which allowed modern life to evolve.
What is stratospheric ozone depletion?
300
Redshift of distant galaxies reveals what about our U?
Is our U expanding?
400
First described the laws of motion and gravity.
Who is Newton?
400
5-7 billion years
How long will our sun live, expectedly?
400
The early atmosphere had little or no free oxygen.
What is the diff between early Earth and modern Earth?
400
1. H and He
2. First stars, beg of Stelliferous Era
3. Carbon
4. Our Solar System
What is truth?
400
A star will live for how long/a star will die depending on...
What is its mass?
500
Developed a map of a geocentric U that was not question for 1500 yrs.