Explaining Material Groupings - 2nd Grade Science
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What is the best reason to place two materials in the same group?
What is the best reason to place two materials in the same group?
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They share the same observable properties. Materials group together when they have similar characteristics.
They share the same observable properties. Materials group together when they have similar characteristics.
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What property describes a material that soaks up water?
What property describes a material that soaks up water?
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Absorbent. The material has spaces that pull in and hold liquids.
Absorbent. The material has spaces that pull in and hold liquids.
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What property describes a material that does not soak up water easily?
What property describes a material that does not soak up water easily?
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Water-resistant (not absorbent). The material's surface repels water instead of absorbing it.
Water-resistant (not absorbent). The material's surface repels water instead of absorbing it.
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What is an observation in science when grouping materials?
What is an observation in science when grouping materials?
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A fact you notice using your senses or simple tools. Uses evidence from sight, touch, hearing, smell, or measuring.
A fact you notice using your senses or simple tools. Uses evidence from sight, touch, hearing, smell, or measuring.
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What is a property of a material that you can observe to help group it?
What is a property of a material that you can observe to help group it?
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A characteristic such as color, texture, hardness, or flexibility. These are measurable features you can directly observe.
A characteristic such as color, texture, hardness, or flexibility. These are measurable features you can directly observe.
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Which property should you use to group materials: how it looks or what you wish it were?
Which property should you use to group materials: how it looks or what you wish it were?
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How it looks (an observable property). Science relies on observable facts, not personal wishes.
How it looks (an observable property). Science relies on observable facts, not personal wishes.
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What property describes how a surface feels, such as smooth or rough?
What property describes how a surface feels, such as smooth or rough?
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Texture. Detected by touch - smooth, rough, bumpy, or soft.
Texture. Detected by touch - smooth, rough, bumpy, or soft.
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Which option best supports grouping sandpaper and a rock together: rough or see-through?
Which option best supports grouping sandpaper and a rock together: rough or see-through?
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Rough. Both materials have bumpy, uneven surfaces.
Rough. Both materials have bumpy, uneven surfaces.
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Which observation best supports grouping cork and a wooden block together: both float or both shiny?
Which observation best supports grouping cork and a wooden block together: both float or both shiny?
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Both float. Both materials are less dense than water.
Both float. Both materials are less dense than water.
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Which observation best supports grouping a sponge and a paper towel together?
Which observation best supports grouping a sponge and a paper towel together?
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Both absorb water. Both materials have porous structures that hold water.
Both absorb water. Both materials have porous structures that hold water.
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Which option best supports grouping glass and clear plastic together: transparent or rough?
Which option best supports grouping glass and clear plastic together: transparent or rough?
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Transparent. Both materials allow light to pass through clearly.
Transparent. Both materials allow light to pass through clearly.
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What property describes a material that lets most light pass through clearly?
What property describes a material that lets most light pass through clearly?
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Transparent. Light travels through with minimal blocking or distortion.
Transparent. Light travels through with minimal blocking or distortion.
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What property describes a material that does not let light pass through?
What property describes a material that does not let light pass through?
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Opaque. Light cannot travel through the material.
Opaque. Light cannot travel through the material.
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Which statement correctly explains why a rock and a wooden block belong in the same group?
Which statement correctly explains why a rock and a wooden block belong in the same group?
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Both are solid and keep their shape. Solids maintain fixed shapes unlike liquids or gases.
Both are solid and keep their shape. Solids maintain fixed shapes unlike liquids or gases.
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Which statement correctly explains why wax paper and plastic wrap belong in the same group?
Which statement correctly explains why wax paper and plastic wrap belong in the same group?
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Both are mostly waterproof and do not absorb water. Their coatings prevent water from soaking through.
Both are mostly waterproof and do not absorb water. Their coatings prevent water from soaking through.
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