matter. lesson 1 (introduction of matter) matter – anything that has mass and takes up space (your...
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Matter
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Lesson 1 (Introduction of Matter)
• Matter – anything that has mass and takes up space (Your body is matter)
• Mass – describes the amount of matter in an object
• Weight – is a measure of the gravitational force on an object
• Volume - the amount of space that an object takes up, or occupies
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• Density – is the measure of the amount of mass in a given volume
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Lesson 2 (Properties of Matter)
Physical property – A characteristic of a substance that can be observed and measured without changing the identity of the substance. - Use your senses to detect physical properties- Color, shape, size, and texture are a few examples of physical properties of gold.
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• Chemical property – describes a substance’s ability to change into a new substance with different properties.
• - Common chemical properties include flammability and reactivity with substances such as oxygen, water, and acids.
• - When left outdoors in wet weather, iron rusts. The ability to rust is a chemical property of iron.
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Lesson 3 (Physical and Chemical Changes)
• Physical change – is a change that affects one or more physical properties of a substance.
Example - If you crumbled up paper it would change the papers shape, however the paper still has the same chemical identity.
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• Chemical change – occurs when one or more substances change into entirely new substances with different properties.
Example – In a campfire, the wood will burn and change to ashes. The wood has undergone a chemical change. The ashes are a new substance with different properties.
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• Laws of conservation of mass – states that in ordinary chemical and physical changes, mass in not created or destroyed but is only transformed into different substances.
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Lesson 4 (Pure Substances and Mixtures)
• Atom – Atoms are the smallest unit of an element that maintains the properties of that element.
• Atoms are the basic building blocks for all three types of matter, (elements, compounds and, mixtures.)
• An element is made up of one or more of the same kind of atom chemically combined. (Oxygen)
• A compound is made up of different kinds of atoms chemically combined. (Water)
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• A mixture contains a variety of elements and compounds that are not chemically combined with each other.(Nitrogen, Water , and Oxygen mixed together)
• Pure substances – is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.
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A heterogeneous mixture is one that does not have a uniform composition. ( soil has dirt, rocks, leaves and even insects mixed together.)
Homogeneous mixture has a uniform composition where substances are evenly spread throughout. (sugar-water, the sugar dissolves and the mixture has the same sweet taste.)