Acids

A substance that donates hydrogen ions (H+) or protons to a chemical reaction and they have a pH value less than 7 on the pH scale, which ranges from 0 to 14.

3.6.A measure, test, and record physical properties of matter, including temperature, mass, magnetism, and the ability to sink or float in water;

3.6.B describe and classify samples of matter as solids, liquids, and gases and demonstrate that solids have a definite shape and that liquids and gases take the shape of their container;

4.6.A classify and describe matter using observable physical properties, including temperature, mass, magnetism, relative density (the ability to sink or float in water), and physical state (solid, liquid, gas);

5.6.A compare and contrast matter based on measurable, testable, or observable physical properties, including mass, magnetism, relative density (sinking and floating using water as a reference point), physical state (solid, liquid, gas), volume, solubility in water, and the ability to conduct or insulate thermal energy and electric energy;

6.6.D compare the density of substances relative to various fluids; 

6.6.A compare solids, liquids, and gases in terms of their structure, shape, volume, and kinetic energy of atoms and molecules;