Conceptual Physics - Classification of Matter
Day 1 |
Day 2 |
Lab 1 |
Lab 2 |
|Process Standards: 1.1, 1.2, 1.3, 2.1, 2.2, 3.3, 3.4, 3.5, 4.1, 4.2, 4.4, 4.5, 4.6, 6.1, 6.3, 6.4
Content Standards: 1.1, 1.3
Instructional Technology Standards: 2.1, 4.2
- Be able to classify matter as substances, mixtures
- Know how solutions are different from suspensions.
- Know how elements are different from compounds.
- Be able to give examples of physical properties.
- Give examples of colloids, solutions, suspensions, elements and compounds.
- Be able to give physical properties that can be used to separate a mixture.
- Be able to give examples of how mixtures can be separated.
- Be able to describe how photochemical smog (air pollution) forms.
- Describe how temperature affects the amount of solute (sugar) that can dissolve in a solvent (water).
- Physical property
- Chemical property
||What phase of water is most common on
we classify things?
What is classification based
- Classification helps us organize things.
- Classification makes study easier.
Matter has both physical and chemical characteristics. Any
characteristic of a material that can be observed without changing the
substances that make up the material is a physical property. Any
characteristic that describes how one material interacts with another material
is a chemical property.
- Most classification systems are based on some visible characteristic.
- Matter can be classified using physical characteristics like color, size,
- One good use of classification is to take a large group of things and
break it into smaller groups based on traits. Our emphasis will be on the
classification of matter. We have an idea of what matter is and we know that
there are many different traits of matter. There is really no "correct" way to
group matter. But a system does exist for the classification of matter.
- List at least two physical properties of matter.
- List at least two chemical properties of matter.
- Classification is common around your home. Describe four
classification systems you use at home.
||What is the solvent in air?
Four groups based on the makeup of
the most common liquid solution on Earth? answer
are the simplest pure substances. An element cannot be changed into simpler
substances by any chemical process. Elements are made up of atoms.
- Compounds are pure
substances made up of more than one element. Atoms of the elements in a compound
are chemically bonded together to form molecules. Molecules are changed
during chemical reactions.
- Mixtures consist of two or
more substances mixed together but not chemically combined. Substances in
mixtures can be separated by physical means.
- Solutions are special mixtures
formed when one substance dissolves in another.
Parts of a solution:
- Solvent - the most abundant substance in the solution.
- Solute - the least abundant substance in the solution.
a comparison of the amount of solute dissolved in an amount of
solvent. One way is to express concentration is by using percentage of
mass. For example, a 5% solution of sodium hydroxide contains 5g sodium
hydroxide in each 100g of solution.
Solutions have two main traits:
- Particles are too small to see.
- Particles are evenly distributed.
solutions are not liquids
- Air is a solution of gases.
- Steel is a solution of metals.
In-class Assignment 052:
This assignment must be
turned in by the end of class today to receive credit.
- What is the solvent in steel?
- Calculate the number of grams of NaOH in 250g of a 10% NaOH solution.
||As a group (your table), ask your science facilitator for material to
do the following in class:
- Place 10g of crushed calcium carbonate, 20g of fine sand, and 30g of
small, clean pebbles in a plastic cup.
- Add 5g of water to the cup and stir thoroughly.
- Allow the combined materials to dry overnight.
- Remove the dry material from the cup. What is this material normally
called. Which of the 4 groups of matter does it belong to?
Most of the water on Earth is in the liquid
While oceans obviously come to mind, there are huge
amounts of liquid water under ground. Much of this water is found in underground
rivers known as "aquifers".
Nitrogen is the solvent in air.
Air is about
80% nitrogen. By definition, the most abundant substance in a solution is the
Sea Water is the most common liquid solution on Earth.
Ions In Sea Water