The most abundant gas making up the Sun's composition is _______________
Fill in the blank(s) with correct word
hydrogen
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How do humans use their eyes to measure relative distance by parallax?
a. By continuously focusing our eyes on distant objects, we can determine distance. b. Since our eyes are separated, the brain interprets the relative look angles of these eyes in terms of distance to the object viewed. c. Our eyes can measure the time it takes light to travel from an object and from this we get distance. d. By moving our heads from side to side our brain compares look angles from each of these positions to obtain the distance to the object viewed.
Comets are not actually members of the solar system, but captured by the Sun
Indicate whether the statement is true or false
One mole of Strontium-90 is decaying with a half life of 28. years. After 61. years, how much Strontium is left and what is its activity?
What will be an ideal response?
The materials that compose most of Titan are completely different than those that compose Earth. Therefore, what were scientist surprised to see from space-probe images in a 2005 landing?
A) some indications that an ancient civilization may have inhabited Titan approximately 500,000 years ago B) a landscape similar to Earth's C) an utterly alien landscape, unlike anything seen on Earth D) the image of a man's face on an equatorial mountain range