Lecture 7 Bio
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- Humans desire to explore and learn can sometimes be very dangerous, which is exemplified by the destruction of the Space Shuttles __________ and ________
- Columbia, Challenger
- The basis of life on Earth is in the form of the element _________ and as this element is abundant throughout the Universe it also may serve as the basis of life on other planets.
- carbon
- In order for life to exist, it requires a narrow range of environmental conditions, including pH, pressure, energy, and _________.
- temperature
- The inhospitable caves known as Caeva De Willa Luiz in Mexico are home to bacteria which form large colonies that drip from the ceilings. These colonies are called _________.
- snottities
- Lake Vostok is a large body of water which is located about 4,000 m below the ___________ ice sheets and contains abundant life which can tolerate the extreme cold.
- Antarctic
- Bacteria live 3.5 km underground within the Earth’s crust and gain their energy from _______ gas.
- methane
- In a recent poll of scientists at a European Space Agency conference found that _______ of them believe that life once existed on Mars and ______ believe it supports life today.
- 75%, 25%
- ________, a moon of Jupiter, is hypothesized to have a liquid ocean capable of supporting life under its thick ice caps
- Europa
- SETI was the first scientific organization to look for evidence of ______________
- Extraterrestrial Intelligence
- The equation formulated in the 1960’s to estimate the possible number of intelligent civilizations in the Milky Way Galaxy is called the _______ equation
- Drake
- Although it is currently impossible to see distant planets around other stars using telescopes, we can detect them because the planets exert a gravitational pull on the stars that they orbit. This pull causes the star to _________.
- wobble
- ________ telescopes were the first type of telescopes employed to look for the signals of communication from distant civilizations.
- radio
- The ________ space crafts were both launched in the 1970’s to explore our solar system, but although they have been traveling for more than 30 years, it would take another ________ years at the speed of light for them to reach the next closest star.
- Voyager, 80,000
- Some scientists believe that intelligent life may not exist in the Milky Way Galaxy because of the probability of ___________ for a technologically advanced civilizations is rather high.
- self-annihilation
- One argument for the presence of intelligent life elsewhere in our galaxy assumes that because _________ evolved, the conditions of the universe must be suitable for intelligent life to evolve elsewhere.
- humans