Drag the tiles to the boxes to form correct pairs. Use the Hertzsprung-Russell diagram to determine which condition describes each star. Use the arrows to help you locate the stars.

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Procyon B

Polaris

Vega

“It is fusing hydrogen at its core”_

“It has lost its outer shell and retained only a hot core that is slowly losing its brightness”_

“It’s temperature has decreased, but it is shining brighter than before”_

Answer quickly (15 points) a comet is approaching earth. describe earth’s gravitational pull as the comet gets closer to it. a. remain constant b. increase c. decrease d. reversed

Is it possible to use the energy from two atoms colliding to create a clean burning lasting fuel source with a large amount of force? is it also possible to harness that energy from the two atoms colliding to create a clean energy source that will last for years from just two atoms colliding. is there a possibility to control and store that energy for years but slowly let the energy out enough to power cities cheaper and faster.

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?