PPT-Pure Substances and Mixtures

Grade 7 Matter is anything that has mass and takes up space Mass is the amount of matter in an object A Solid is matter that has a definite shape and volume A liquid is matter that does not have a definite shape but has a definite volume. Grade 7 Science: Pure Substances and Mixtures. Ms. Willis. Mixtures in Industry. Learning Goal: To identify some industry applications of separating mechanical mixtures and solutions.. Mixtures in Industry. Mixtures may be separated by many different techniques based on differing physical and/or chemical properties. Sorting. Simply picking apart the different components. This can be easy and obvious…. August 31. How do you separate?. How can you separate mixtures?. Separating. Separating is based on the difference in . physical properties . of the substances…. Think about how you would separate a bag of m&ms. Divisions of Matter. Pure Substance. Cannot be broken down and retain its properties.. Has a fixed composition.. Every sample of a pure substance has EXACTLY the same composition AND exactly the same characteristics - homogeneous. Pure substances cannot be broken down by physical means.. Pure substances . contain . only one kind of molecule.. Molecules are small groups of atoms that make up matter. Example: Water is a molecule of two hydrogen atoms, and one oxygen atom. How can matter be classified?. Atoms . are the smallest unit of an element that maintains the properties of that element.. The most basic ingredients to . all . matter. Atoms can be combined in three majors ways:. Objectives. PSc.2.1.1. . Classify matter as: homogeneous or heterogeneous; pure substance or mixture; element or compound; metals, nonmetals or metalloids; solution, colloid or suspension.. . Shoe Classification Activity. th. Grade Science. What are “Substances”? . Substances can be identified as either…. Elements. Compounds. Mixtures. So, what is a substance?. A substance cannot be further broken down or . p. urified by physical means.. Properties of matter . What do you see when you look at matter? . Properties used to describe matter can be classified as either:. Extensive . Intensive . Extensive vs. intensive properties. Extensive. Matter. -. anything that has mass and takes up space. .  . Properties of Matter . -Matter can have many different properties or characteristics. -. Chemistry. . is the study of the properties of matter and how it changes. UEQ: How does the structure of matter influence its physical and chemical behavior?. LEQ: How is matter classified?. Bell Work 09/19/2012. Write question and answer.. Can you chemically break down an atom? Why or why not? . 2014EdusmartGR 4 Teacher GuideGrade 4Separating MixturesTEKS 45Matter and EnergyThe student knows thatmatter has measureable physical properties and those properties determine how matter is classified Purity, formulations and chromatography. Chromatography. Can be used to separate mixtures and help. identify substances.. Involves a mobile phase. (e.g. water or ethanol) and a stationary phase (e.g. chromatography paper). . Keywords. :. DATE. Learning Objectives. Recognise the difference between materials, substances and . elements . Identify . elements by their names and . symbols. Explain . what is meant by a chemically pure substance.