Earth Science Crossword

Nebula
SPINNING PLANETARY DISC- A ROTATING DISC OF DENSE GAS AND DUST SURROUNDING A NEWLY FORMED
GALAXY- A SYSTEM OF MILLIONS AND BILLIONS STARS TOGETHER WITH GAS AND DUST HELD TOGETHER BY GRAVITAIONAL
NUCLEAR FUSION- A NUCLEAR REACTION IN WHICH ATOMIC NUCLEI OF LOW ATOMIC NUMBER FUSE TO FORM A HEAVIER NUCLEUS WITH RELEASE OF
PROTO PLANET- A LARGE BODY OF MATTER IN ORBIT AROUND THE SUN OR A STAR AND THOUGHT TO BE DEVELOPING INTO A
MOON- THE NATURAL SATELLITE OF THE
PROTO STAR- A CONTRACTING MASS OF GAS THAT REPRESENTS, AN EARLY STAGE IN THE FORMATION OF A STAR, BEFORE NUCLEOSYNTHESIS HAS
ASTEROID BELT- A CIRCUMSTELLAR DISC IN THE SOLAR
COLLISIONS- AN INSTANCE OF ONE MOVING OBJECT OR PERSON STRIKING VIOLENTLY AGAINST ONE
GRAVITY- THE FORCE THAT ATTRACTS A BODY TOWARD THE CENTER OF THE
NEBULAR THEORY- THE THEORY THAT THE SOLAR AND STELLAR SYSTEMS WERE DEVELOPED FROM A PRIMEUAL
OORT CLOUD- A SPHERICAL SHELL OF COMETARY BODIES BELIEVED TO SURROUND THE SUN FOR BEYOND THE ORBITS OF THE OUTERMOST PLANETS AND FROM WHICH SOME ARE DISLODGED WHEN PERTURBED TO FALL TOWARD THE