Sorting and Classifying Materials - 2nd Grade Science
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What is the main rule for making fair groups when you classify materials?
What is the main rule for making fair groups when you classify materials?
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Use one chosen property at a time and apply it the same way. Consistent criteria ensure accurate classification.
Use one chosen property at a time and apply it the same way. Consistent criteria ensure accurate classification.
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Which observable property tells whether a material is hard or soft?
Which observable property tells whether a material is hard or soft?
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Hardness. This property measures resistance to pressure or scratching.
Hardness. This property measures resistance to pressure or scratching.
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What are "observable properties" when you classify materials in science?
What are "observable properties" when you classify materials in science?
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Properties you can see, feel, or test safely (no guessing needed). These are traits you can detect with your senses.
Properties you can see, feel, or test safely (no guessing needed). These are traits you can detect with your senses.
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Which property is best to sort these into "hard" and "soft": rock and sponge?
Which property is best to sort these into "hard" and "soft": rock and sponge?
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Hardness. Rocks resist pressure; sponges compress easily.
Hardness. Rocks resist pressure; sponges compress easily.
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What does the word "material" mean when you are sorting and classifying objects?
What does the word "material" mean when you are sorting and classifying objects?
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What an object is made of (such as wood, metal, plastic, glass). Materials are the substances things are made from.
What an object is made of (such as wood, metal, plastic, glass). Materials are the substances things are made from.
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Identify the best property to sort objects into "floats" and "sinks" in water.
Identify the best property to sort objects into "floats" and "sinks" in water.
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Whether it floats or sinks (buoyancy). Objects with lower density than water float.
Whether it floats or sinks (buoyancy). Objects with lower density than water float.
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Which group is correct if you sort by magnetism: paper clip, nail, plastic spoon?
Which group is correct if you sort by magnetism: paper clip, nail, plastic spoon?
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Magnetic: paper clip, nail; Not magnetic: plastic spoon. Metal items attract to magnets; plastic doesn't.
Magnetic: paper clip, nail; Not magnetic: plastic spoon. Metal items attract to magnets; plastic doesn't.
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Which test checks magnetism using a safe tool in the classroom?
Which test checks magnetism using a safe tool in the classroom?
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Bring a magnet near it and see if it attracts. Magnets attract magnetic materials but not others.
Bring a magnet near it and see if it attracts. Magnets attract magnetic materials but not others.
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Which property is best to sort these into "flexible" and "rigid": rubber band and wooden stick?
Which property is best to sort these into "flexible" and "rigid": rubber band and wooden stick?
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Flexibility. Rubber bands stretch; wooden sticks don't bend.
Flexibility. Rubber bands stretch; wooden sticks don't bend.
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Which property is best to sort these into "shiny" and "dull": aluminum foil and rubber?
Which property is best to sort these into "shiny" and "dull": aluminum foil and rubber?
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Luster (shininess). Foil reflects light strongly; rubber absorbs it.
Luster (shininess). Foil reflects light strongly; rubber absorbs it.
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Which property is best to sort these into "rough" and "smooth": sandpaper and glass?
Which property is best to sort these into "rough" and "smooth": sandpaper and glass?
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Texture. Sandpaper has a rough surface; glass is smooth.
Texture. Sandpaper has a rough surface; glass is smooth.
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Which group is correct if you sort by transparency: clear plastic wrap, tissue paper, book?
Which group is correct if you sort by transparency: clear plastic wrap, tissue paper, book?
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Transparent: plastic wrap; Translucent: tissue; Opaque: book. Clear items are transparent, tissue scatters light, books block it.
Transparent: plastic wrap; Translucent: tissue; Opaque: book. Clear items are transparent, tissue scatters light, books block it.
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What observable property tells whether a material is magnetic or not magnetic?
What observable property tells whether a material is magnetic or not magnetic?
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Magnetism. This property shows if materials attract to magnets.
Magnetism. This property shows if materials attract to magnets.
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Which term means "you cannot see through it," like cardboard or wood?
Which term means "you cannot see through it," like cardboard or wood?
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Opaque. No light passes through these materials.
Opaque. No light passes through these materials.
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Which term means "you can see through it clearly," like clear glass?
Which term means "you can see through it clearly," like clear glass?
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Transparent. Light passes through completely without distortion.
Transparent. Light passes through completely without distortion.
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