Astronomers - Study guides, Class notes & Summaries

PHSC Exam Questions with Correct Answers New Update How long does the sunspot cycle last, on average? Select one: a. about seven years b. about 76 years c. about 11 years d. between 25 and 35 days - Answer -11 years The vibrations of the Sun reveal information about Select one: a. the magnetic field of the Sun. b. the production of energy in the Sun. c. the structure of the atmosphere of the Sun. d. the interior structure of the Sun. - Answer -interior structure The m...

A black car left in the sunlight becomes hotter than a white car left in the sunlight under the same conditions because - ️️the white car reflects more sunlight than the black car. A planet is detected via the Doppler technique. The velocity change of the star is a measure of - ️️the planet's mass and orbital distance. A planet will have bands in its atmosphere like Jupiter and Saturn if - ️️the planet has a high temperature. A prism is able to spread white light out into a spect...

According to Hubble's Law, if two galaxies are not part of our Local Group, and galaxy B is three times farther away from us as Galaxy A, then Galaxy B will - ️️ove away from us three times faster than A According to our current understanding, giant elliptical galaxies form: - ️️by the merger (or swallowing) of a number of smaller galaxies in a cluster of galaxies According to the models of the universe we discussed in this course, why do the galaxies move apart (why do we have Hubble...

What are the Milky Way Galaxy's spiral arms? - The spiral arms are places where stars are formed from clouds of gas and dust Where are you in the Universe? If you had to give directions to your location in the Universe, what directions would you give? - We are the third planet away from the Sun. Our Solar System is located in one of the spiral arms of the Milky Way Galaxy, one within the Local Group of galaxies Why do astronomers now label Pluto a "dwarf planet"? - Due to its small size ...

To find the most accurate distance to a nearby star using parallax, astronomers could compare the view of the star against the background stars at what times of the year? - In January and July Which of the following correctly expresses the distance to a nearby star? - 1.3 parsecs Consider two stars (Y and Z) that both exhibit parallax. Star Z appears to move back and forth against the background stars by a greater amount than Y. Which star is farther away from Earth? - Star Y A star has a p...

The Bell-Magendie law was significant because: a) it solved the mind-body problem b) it confirmed Hartley's view of nerve conduction c) it demonstrated that specific mental functions were mediated by different anatomical structures d) it allowed the individual differences in reaction times among astronomers to be equated Ans: c) it demonstrated that specific mental functions were mediated by different anatomical structures Weber found that subjects detect much smaller weight differenc...

As astronomers have learned more about the structure of the Sun, they found that it - Answer- is made entirely of hot gas. You are out on the beach, enjoying the warm sunshine with friends. As you glance (briefly we hope) up at the Sun, the part of the Sun that you can see directly is called its - Answer- photosphere. How do astronomers know the composition of the outer layers of the Sun? - Answer- We take an absorption line spectrum of the Sun. these absorption lines tell us what ...

Using the ideas discussed in the text, in what sense are we "star stuff"? - Nearly every atom from which we are made was once inside of a star When did humans learn that the Earth is not the center of the universe? - Within the past 500 years How are galaxies important to our existence? - Galaxies recycle material from one generation of stars to the next, and without this recycling we could not exist. If we imagine the history of the universe compressed into one year, dinosaurs walked...

Science Praxis 5005 Elementary Education 100% Correct Plate tectonics Movement of continents and changes in the Earth's crust caused by internal forces Atmosphere dry gas (nitrogen, oxygen, argon carbon dioxide), water vapor, solid particles Troposphere closest to Earth's surface (weather related activities) Stratosphere Very little water, ozone layer Mesosphere Coldest layer Thermosphere Layer extends upward into space Mountains are caused by... volcanic action or tectonic plate collisi...

It is believed that an asteroid or comet impact caused the extinction of the dinosaurs 65 million years ago. What are the two major lines of evidence supporting this theory? - There is a layer of clay at the time of the dinosaurs with high concentration of iridium from asteroids in it, and scientists have found a large impact crater that hit Earth 65 million years ago. . Of the four Earth biomes shown below, which has the greatest number of species? - Rainforest A student collects the foll...