Investigation 1
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The document discusses mixtures and solutions. A mixture is when two or more materials are stirred together but can be separated, such as gravel in water. A solution is a special type of mixture formed when a material dissolves in water, such as salt dissolving in water. The document asks questions about separating solutions and mixtures using screens or filters and determining the mass of a salt solution.
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This document discusses mixtures and solutions. It defines matter and explains that mixtures are made of two or more kinds of matter that can be separated using various methods like filtration or evaporation. Solutions are mixtures that form when one material dissolves in another and cannot be separated by filtration. The document provides examples of mixtures like sand and water or iron and sand, and solutions like salt water. It also gives methods for separating different types of mixtures and defines terms like solubility, saturated solutions, concentrated and dilute solutions.
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Pure substances have a fixed, uniform structure and composition throughout. They cannot be separated into other components and have definite physical properties like melting and boiling points. Mixtures contain two or more substances mixed together without a fixed structure or composition. Homogeneous mixtures like salt water are uniform throughout, while heterogeneous mixtures like sand and water are non-uniform with different components settling in separate layers. Aqueous solutions use water as the solvent, while non-aqueous solutions use solvents other than water. The solubility of solids in liquids generally increases with temperature as higher temperatures provide more energy to overcome intermolecular forces.
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This document provides information about a Grade 2 science class taught by Teacher Merry. It outlines the 5 classroom rules and 5 golden reminders. It then introduces the unit on matter, defining matter as anything that takes up space and has mass. The first lesson is on the characteristics of solids, which are defined as having a clear shape, definite volume and mass, color, texture, and odor. Examples of solids are provided. The next lesson will cover the characteristics of liquids.
Heterogeneous mixtures
The document discusses heterogeneous mixtures. It provides examples of halo-halo ingredients like nata de coco and garbanzos retaining their distinct properties when mixed together. This occurs because heterogeneous mixtures have a non-uniform composition, and each component maintains its individual properties and can be separated through physical means unlike homogeneous mixtures. The document then classifies heterogeneous mixtures into suspensions, colloids, and emulsions depending on whether solid, liquid, or gas particles are suspended in another substance.
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The document discusses solutions and their components. A solution is a homogeneous mixture of two or more substances, where one substance, known as the solvent, dissolves the other substance, known as the solute. For example, in a solution of sugar in water, water is the solvent and sugar is the solute. The maximum amount of solute that can dissolve in a solvent is known as the solubility. Solutions can be classified as unsaturated, saturated, or supersaturated based on their solubility. Solutions occur naturally, like in bodies of water, blood, and air, or can be manufactured like alloys, vinegar, and coffee. Concentrated solutions have a large amount of solute relative to solvent, while diluted
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Physical properties of matter..introduction (Teach)
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Investigation 1
- 1. Investigation 1 Mixtures and Solutions
- 2. Word Bank A mixture is two or more materials stirred together. A property is a characteristic of an object, something you can observe such as size, color, shape, or texture. A solution is a special mixture formed when a material dissolves in water. Dissolving is a process in which one material disperses uniformly into another material, so that the first material seems to disappear.
- 3. Content Inquiry Jose Garcia asked, “What would happen if we mixed all the material into one?”
- 4. Part 2 What is a mixture? How can a mixture be separated? If salt and water make a special kind of mixture called a solution…then Can you separate a solution with a screen? With a filter paper? How might you separate the ingredients in a solution?
- 5. Weighing the Water Make and weigh the salt solution
- 6. ? Will a solution made with 50 ml of water and a spoon of salt have the same mass as 50 ml of plain water? More mass? Less mass? How can we find out?
- 7. ? How can you determine the number of grams of salt you put in the water to make the solution?
- 8. ? You separated the gravel from the water and the powder from the water with filters. How can you separate the salt from the water? How can you get the salt back?
- 9. Part 3
- 11. Line of Inquiry How has salt positively affect the world?
- 12. Making Inferences Clues from the story My inference What I already know