Across
- 2. having the structure and form of a crystal; composed of crystals.
- 3. a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei.
- 5. a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
- 6. an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results.
- 7. the action of purifying a liquid by a process of heating and cooling.
Down
- 1. a measure of the ability of a substance, or more generally of any physical system, to transfer heat energy to another physical system.
- 3. a quantity representing the power to which a given number or expression is to be raised, usually expressed as a raised symbol beside the number or expression.
- 4. a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.