Transcription of Grade 9 Science Unit 1: Atoms, Elements, and Compounds
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Grade 9 Science UNIT 1: ATOMS, elements , AND Compounds C H A P T E R 1 UNIT TERMS Use term handout to define all terms for this unit. SAFETY IN THE Science CLASSROOM Read pages 8-9 Activity 1-1A Page 9 ** Look for 14 things! Page 10-11 WHIMIS SYMBOLS Page 12 ExploreMore - Page 13 INVESTIGATING MATTER WHAT IS MATTER? Matter is anything that has mass and volume. Mass is the amount of matter in a substance or object. Volume is the amount of space a substance or object occupies. Matter is made up of elements elements are substances that contain one type of matter and cannot be broken down or separated into simpler substances In chemistry, the Periodic Table of elements is used to organize elements PERIODIC TABLE OF elements DESCRIBING MATTER Properties (p. 18) Characteristics of matter that are often observed or measured Can be either qualitative (observed) or quantitative (measured).
composed of four “elements:” Earth Air Wind Fire Aristotle agreed with Empedocles and no one seriously challenged it for the next 2000 years. Democritus: eventually a substance will be cut into a piece that can no longer be cut. He called this piece atomos.
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