Gravity & stars
Gravity is an attractive force that exists between all objects that have ______ .
What is mass?
The spin of an object around its axis is called ______.
What is a rotation?
What is a large ball of gas held together by gravity with a core so hot that nuclear fusion occurs?
What is a star?
regions of strong magnetic activity, that are are cooler than the rest of the photosphere and appear as dark splotches on the Sun
What are sunspots?
What is it called when the Moon moves into the Earth's shadow?
What is a lunar eclipse?
The Law of Universal Gravitation is the pull of gravity between two objects. This force depends on what two things?
What is the mass of the objects and the distance between them?
If the northern hemisphere is tilted towards the sun, what season will the southern hemisphere be experiencing?
What is winter?
What is the closest star to Earth called?
What is the sun?
Term describing a model of the solar system in which Earth and the other planets revolve around the sun
What is heliocentric?
the moon phase in which a lunar eclipse happens
What is a full moon?
what is apparent magnitude
When Earth's rotational axis is tilted neither toward nor away from the sun. This is called _______.
What is an equinox?
It is the process that occurs when the nuclei of several atoms combine into one larger nucleus? It powers stars.
What is nuslear fusion
the color of the hotest star
what is blue
The moon phases Earth is experiencing during neap tides
what are 1st Quarter and 3rd Quarter?
the true brightness of a star and is based on on the star's temperature and mass
what is absolute brightness/magnitude or luminosity
What is it called when the Earth's rotational axis is tilted directly toward or away from the sun?
What is a solstice?
the Sun and most stars are made almost entirely of what two elements?
What is hydrogen and helium
____________determines a star's temperature and its luminosity.
what is mass
What is it called when the Moon's shadow appears on Earth's surface?
What is a solar eclipse?
scientists classify stars according to their _____________
what is spectra (a star's temperature and luminosity)
What changes the intensity of light that the Earth receives throughout the year and creates the seasons?
What is the Earth's tilt on its axis?
the wide-outermost layer of a sytar's atmosphere
What is the corona
What is brightness, color, temperature, and size
The largest tidal range that occurs when the Sun, Earth, and Moon form a straight line is called a_______.
what is a Spring tide?