Space and the Universe Crossword Puzzle
QUESTIONS LIST: gravity : the force of attraction that exists between any two masses, whether they be stars, microscopic particles or any other bodies with mass, atom : the basic building block of all normal matter, consisting of a nucleus orbited by a cloud of negatively-charged electrons, black hole : the warped space-time remaining after the gravity of a massive body has caused it to shrink down to a point, inertia : the natural tendency of objects to resist changes in their state of motion, molecule : a collection of atoms glued together by electromagnetic forces, electron : a negatively-charged sub-atomic particle. it is an indivisible, elementary particle, and is usually to be found orbiting the nucleus of an atom, matter : anything that has both mass and volume (i.e. takes up space), magnetic : _ field - the field of force that surrounds a magnet, mass : a measure of the amount of matter in a body, photon : a particle of light or other electromagnetic radiation, which has no intrinsic mass and can therefore travel at the speed of light, big bang : the huge “explosion” 13.7 billion years ago in which the universe is thought to have been created, dark matter : matter that gives out no light and does not interact with the electromagnetic force, but whose presence can be inferred from gravitational effects on visible matter, light year : a convenient unit for measuring the large distances in the universe.