Module 1 Unit 1 Assignment B Answer the questions. Provide references at the end of the assignment. 1. What are the two things that characterize matter? (1 mark) The quantity of matter that makes up an object is called its mass, and it is commonly expressed in grams or kilograms. The volume of matter that an object contains is expressed in litres or cubic metres. 2. What are the two main classes of matter? (1 mark) Pure substances are made of matter that has a consistent composition and set of qualities. Combinations of two or more chemicals in which each substance maintains its characteristics are called mixtures. 3. Name the two sub-classes in pure substances? (1 mark) Elements are substances (such as oxygen and gold) that cannot be chemically broke down into simpler substances. Compounds are substances (such as carbon dioxide and water) that are created by combining multiple elements in specific amounts. 4. Define a mixture; give two examples, providing their names (2 marks) A mixture is composed of more than one substance that can be physically separated while maintaining their chemical characteristics. Examples: A salad is a combination of several vegetables that yet have their individual qualities. Air: A blend of various gases, such as carbon dioxide, nitrogen, and oxygen. 5. Classify each of the substances as mixture or solution, compound, or element. Justify your answer: (30 marks) write in RTR FORMAT