Solve these clues to fill the grid.
- How much matter something contains
- 1 Across
- Enterprising or ambitious drive
- 3 Across
- A process in which one or more substances are changed into others
- 7 Across
- The force used in ___
- 9 Across
- A change of position that does not entail a change of location
- 11 Across
- Force that pulls objects toward the Earth
- 13 Across
- An increase in rate of change
- 14 Across
- The tendency of a body to maintain its state of rest or uniform motion unless acted upon by
- 15 Across
- The state of being active
- 2 Down
- To throw out of balance or equilibrium
- 4 Down
- Any agent that carries and transmits a disease
- 5 Down
- A general course along which something has a tendency to develop
- 6 Down
- English mathematician and physicist
- 8 Down
- A brief event in which two or more bodies come together
- 10 Down
- The resistance encountered when one body is moved in contact with another
- 12 Down
- Italian astronomer and mathematician who was the first to use a telescope to study the stars
- 13 Down