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Use observations from the video and thumbnails to describe the material characteristics of the red crayons before melting. Use observations from the video and thumbnails to describe the material characteristics of the red crayons after melting. Use observations from the video and thumbnails to describe the material characteristics of the red crayons after cooling. CLAIM - Was the change caused by heating and cooling the crayons reversible or not reversible?EVIDENCE - Identify and describe the evidence to support your claim.REASONING - Use reasoning to logically connect the evidence to the claim.
1838
solid, smooth, red, cylindrical, broken, shiny liquid, smooth, red, broken, shiny, octagonal prism shaped solid, smooth, red, broken, shiny, octagonal prism shaped, work as crayonsReversibleThe crayon still worked. The crayon was heated to change shape. Color did not change. Looks like no mass was lost.Heating is a reversible change. You could reheat it, remold it, and cool it back to crayon shapes. Solids turn to liquids and back to solids again with heat energy.
1839
solid, red, tube shaped, shinyliquid, gooey, red, Solid, red, makes marks on paper, flat square shaped ReversibleBecause at the start they were solid tube shapes, but when they were heated they did not stay solid they turned gooey and like a thick liquid that could be poured out into moulds and made into new shapes. When the new shapes were left to cool they were solid again, showing that the change to gooey was reversible. If the crayons hadn't returned to a solid form they wouldn't be able to be held and used to make marks like they are in the final picture.
1840
hard, shiny, red, waxy, broken, solid, cylindermelted, liquid, red, hot, moldablehard, shiny, red, waxy, broken, solid, square shapeReversibleIf you found a mold in a cylinder shape and remelted the squares they would look like the original crayonsThe crayon (solid) can be melted (liquid) and cooled to create a new shape and then remelted and cooled again to create a new shape.
1841
Broken, waxy, red, a top section with a point, a middle section and an end section. 3 sections in all. Lying side by side. Small indents in some of the crayon pieces. Shiny.Liquid, warm (hot), shiny, malleable. firm, holding the shape of the mold, waxy, brittle, shinyReversibleThe substance (molecular makeup) of the crayons remain unchanged. The crayon still produced a red color when applied to the paper.If you were to heat them up again and pour into a crayon shaped mold it would become a standard crayon again.
1842
Solid shape, shiny, broken into three pieces of approximate sizesThe candles have become a liquid; poured into a mold the liquid takes the shape of the mold.Hard, solid shapes that reflect the moldReversibleThe candles can be reshaped after heating up and cooling down.Initial shape and size 》heated up 》liquid 》reformed in the mold 》new shape and sized objects made from the same original material
1843
solid, waxy, hard, brittle, cool to the touch, rigid, liquid, shiny, hot, moldable, glossysolid, changeable shape, waxy, Reversiblecrayons were heated to change their state, then poured into a mold that changed the original shape. once the wax cooled the crayon solidified into a new shape but maintained it's original qualititescooling and melting changed the state of the crayon but it was reversable
1844
hard, glossy, broken into 3 pieces, cylindrical, solidliquid, amorphic shape, fluid, glossy/shinyreshaped into a new form, square gem shaped, solid, still colorReversibleThe crayons start and end in a solid form. The heat caused the solid material to melt into liquid. Once the heat was removed and cooled, it returned back to a solid shape. If a material starts and ends in the same state of matter, it is reversible. We could have used a crayon mode to replicate the original shape. But the essence of a crayon as a mark making solid tool, was produced again at the end. When heat is applied and removed, the material changed back to solid from a liquid.
1845
solid, smooth, red, cylinder shapedliquid, hot, red, flowssolid, red, octagonal shapeReversiblethe crayon was heated and changed from a solid into a liquid and then back into a solid when cooledheat can change a material from a solid to a liquid and cooling can change a liquid into a solid
1846
SolidLiquidSolidReversibleIt went from a solid form to a liquid to a different solid formThe change is reversible because it went from a solid wand (column) shape to a formless liquid to a different crystalline (?) shape. But the volume stays the same.
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