Solve these clues to fill the grid.
- The season when the leaves ___ from the trees
- 2 Across
- To make a mathematical ___ or computation
- 4 Across
- Strength or the ability to control things
- 7 Across
- The mechanical ___ that a body has by virtue of its motion
- 10 Across
- An instance or single occasion for some event
- 12 Across
- An increase in rate of change
- 1 Down
- A workplace for the conduct of scientific research
- 3 Down
- Fourth Thursday in November in the United States
- 5 Down
- Job or effort to get something done
- 6 Down
- A change of position that does not entail a change of location
- 8 Down
- Force that pulls objects toward the Earth
- 9 Down
- A phenomenon that follows and is caused by some previous phenomenon
- 11 Down