1) In September 2017, the decision was made to allow Cassini to fall and burn up in Saturn's atmosphere. Scientists did this because they were worried it may have some microorganisms on it from Earth and they did not want to risk contaminating any of Saturn's moons. a) saving money for use on other research projects exploring Saturn b) minimizing human impact in the solar system outside of our planet and moon c) applying an understanding of science to a relevant situation d) gathering data about Jupiter's surface as the probe fell 2) Which characteristic is common to the four outer planets in our solar system? a) Gaseous composition b) Low mass c) High density d) Fast revolution 3) The Inner planets have a higher _________ than the gas giants. a) Density b) Mass c) Gravitational Pull d) Amounts of water

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