A solution that had a pH below 7.
A solution that has a pH above 7.
Also known as a bases
What alkaline substances are used to neutralize acids or raise to form salts
What acids are derived from plants that are often used to exfoliate the skin
Colorless gas with a pungent odor that is composed of hydrogen and nitrogen
What is an ion with a negative electrical charge called
What are the smallest particles of an element
What is an ion with a positive charge called
What is a change in the chemical composition or make-up of a substance
What are characteristics that can only be determined by a chemical reaction and a chemical change in the substance
What is the science that deals with the composition, structures, and properties of matter and how matter changes under different conditions
What is rapid oxidation of a substance accompanied by the production of heat and light
Also known as compounds
Subatomic particles with a negative charge
The simplest form of matter
Molecule containing two or more atoms of the same element in fixed proportions
An ingredient that brings two normally incompatible materials together and binds them into a uniform and stable blend.
An unstable physical mixture of two or more immiscible substances plus an emulsifier
Chemical reactions that release significant amount of heat
Sweet, colorless, oily substance used as a solvent and as a moisturizer in skin and body creams
An AHA used in exfoliation and to lower the pH of products
Liquids that are not capable of being mixed together to form stable solutions
The study of substances that don't contain carbon and may contain hydrogen
An atom/molecule that carries an electrical charge
The separation of an atom/molecule into cations and anions
Tail that is oil-loving
Multiples of 10
Any substance that occupies space and has mass
Liquids that are mutually soluble
Oil droplets emulsified in water
The study of substances that contain carbon
A chemical reaction that adds oxygen to a substance to produce an oxide
Also known as redox
Substance that releases oxygen
Crossword puzzles have been published in newspapers and other publications since 1873. They consist of a grid of squares where the player aims to write words both horizontally and vertically.
Next to the crossword will be a series of questions or clues, which relate to the various rows or lines of boxes in the crossword. The player reads the question or clue, and tries to find a word that answers the question in the same amount of letters as there are boxes in the related crossword row or line.
Some of the words will share letters, so will need to match up with each other. The words can vary in length and complexity, as can the clues.
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Crosswords are a great exercise for students' problem solving and cognitive abilities. Not only do they need to solve a clue and think of the correct answer, but they also have to consider all of the other words in the crossword to make sure the words fit together.
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