Initially proposed Hubble’s Law

Part of the current atmosphere of Earth is believed to be

a. the remnants of the original hydrogen and helium gas from the solar nebula attracted by the protoplanet. b. the result of the melting and vaporizing of the glaciers from the last ice age. c. composed primarily of hydrogen and helium. d. composed of gases that were outgassed from the heated rocks sometime after the planet formed. e. the result of a collision between the sun and another star.

The Miller experiment succeeded in creating ____________________

Fill in the blank(s) with correct word

________ used the extensive records of planetary positions measured by ________ to discover that the orbits of the planets are ________.

A. Kepler; Galileo; elliptical B. Kepler; Tycho; elliptical C. Tycho; Kepler; elliptical D. Tycho; Kepler; circular

A liquid has a specific gravity of 0.68. What is its density?

A) 680 kg/m3 B) 1360 kg/m3 C) 1000 kg/m3 D) 6800 kg/m3