Define these Chemistry terms -Y7 Flashcards
Acid
A substance with a ph less than 7
Alkali
A substance with a pH more than 7
Caution
A warning to take care
Corrosive
May destroy metals, stonework or skin
Diluted
A substance with water added to make it less concentrated
Explosive
An explosive substance reacts very fast, giving out a lot of energy and making a lot of noise and gas. Heating may cause an explosion.
Flammable
A substance that catches fire easily
Hazard
Something that could cause harm
Irritant
An irritant may cause skin or eyes to itch, be sore or sting
Toxic
A substance that is poisonous
Concentrated
A solution that contains a large amount of solid (solute) dissolved in a small amount of liquid (solvent).
Precaution
An action taken to reduce the risk of a hazard causing harm (e.g. wearing eye protection when handling an acid to prevent it splashing in your eyes).
Risk
A chance that something could actually cause harm
Dependent Variable
A variable that is measured in an experiment when you change another variable (e.g. you measure the pH when you change the concentration of an acid and so the pH is the dependent variable).
Independent variable
The variable that causes the dependent variable to change (e.g. you measure the pH when you change the concentration of an acid and so the concentration of the acid is the independent variable).
