Solve these clues to fill the grid.
- A substance formed by chemical union of two or more elements or ingredients in definite proportion (plural)
- 4 Across
- An abstract part of something
- 8 Across
- That which has mass and occupies space
- 10 Across
- Any division of quantity accepted as a standard of measurement or exchange (plural)
- 11 Across
- The power to do work or make things move
- 12 Across
- The science of matter
- 1 Down
- One thousand grams
- 2 Down
- How loud something is, or how much space it fills
- 3 Down
- How tightly packed the matter in something is
- 5 Down
- A well-substantiated explanation of some aspect of the natural world
- 6 Down
- A unit of electrical energy equal to the work done when a current of one ampere passes through
- 7 Down
- A substance consisting of two or more substances mixed together
- 9 Down
- How much matter something contains
- 10 Down