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Matter-Measuring Physical Properties

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Josephine Chang

on 1 May 2013

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Transcript of Matter-Measuring Physical Properties

How can we conserve
our environment? Classifying matter
as materials PHYSICAL
QUANTITIES Matter can be characterised by its properties. Matter can be described by its physical and chemical properties.

A physical property is a measurable property that can be observed without changing the substance of the object. MEASUREMENT is anything that has mass and occupies space. A physical quantity is a physical property that can be measured & it consists of a number and unit. Why are measurements important in Science?
What is the scientific standard for measurements? PHYSICAL
PROPERTIES How do we classify? MATTER Why do we classify? There is a great variety of living and non-living things in the world. This complexity may be organised through common characteristics and unifying factors to better understand the world we live in. The study of living and non-living things in terms of their properties and changes is greatly facilitated by putting them into groups. In Primary school, you learn that matter can be classified into its 3 states: What are some common physical properties used for classifying materials? 1. When you have a bunch of items, how do you make sense of all the
items?
2. In the previous chapter, you have learnt that making observations
are important before any inquiry process begins. What are the properties used for
classifying matter into solids, liquids
and gases? fixed shape
fixed volume
compressibility
ability to flow Many of the objects around us are made of different
types of materials. We can also classify matter as materials.

What should we consider when we choose a material
to make an object? Biodegradable vs Non-biodegradable Base quantities Derived quantities Uses of
materials Choice of material depends on:
Properties of the material
Use of the objects

There are many questions we should consider when choosing a material to make an object:
Should the material be low or high density?
Should the material be a good conductor of heat? Length, Area
& Volume Mass, Weight & Density S.I Units & other units Some common
materials Biodegradable materials can be decomposed by bacteria or other living organisms in the soil.

--> Using biodegradable products means that when these products are disposed in landfills, they will not remain in the ground for a long time and pollute the land but can be broken down slowly with time.
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