Which of these is evidence for the Big Bang?

Fairly young fossils are often radiometrically dated using carbon-14 dating. The half life of carbon-14 is approximately 6000 years. A sample of carbon taken from a fossil is found to contain 1/8 the carbon-14 you would find in a sample of carbon of the same size taken from something alive today. From this information, the fossil is approximately how old?

If an atom’s 2p orbitals are full, how many electrons does it have in those 2p orbitals? Be careful. The question asks how many 2p electrons the atom has, not how many TOTAL electrons the atom has.

When alpha particles were shot at gold foil, what happened to the alpha particles?

Uranium-238 alpha decays, emitting a helium-4 nucleus. What is the mass number of the product?

Which of these statements correctly applies the 2nd law of thermodynamics (the law of increasing disorder) to an air conditioner?

In the bottom, double-slit pattern shown above there are lots of small dark lines separating the band of red light into individual spots. The spots are not present in the top image. What causes these?

When the dynamite explodes, what happens to its mass?

Where on the periodic table can you find elements that typically will “take” two electrons in chemical reactions?

Professor Lawler borrows a spaceship and loads one of the lasers from a physics lab into it. She flies away in a straight line at constant speed going exactly half the speed of light.   As she flies off, she shines a beam of light from the laser back towards the science center and has one of her students measure how fast the light is going. What does the student find?