Across
- 3. the process by which particles pass through a tiny opening into an evacuated chamber
- 5. representation of an idea, an object or even a process or a system that is used to describe and explain phenomena that cannot be experienced directly.
- 7. precision or exactness
- 9. smallest part of a substance that cannot be broken down chemically
- 10. a material composed of two or more simpler substances in chemistry
Down
- 1. an idea or set of ideas that is intended to explain facts or events.
- 2. SI derived unit used to measure energy or work
- 4. the belief that nothing exists beyond the natural world
- 5. anything that takes up space and can be weighed
- 6. a group of interacting or interrelated elements that act according to a set of rules to form a unified whole
- 8. something formed by a union of elements or parts