Physical and Chemical Properties and Changes (Chemistry) – Flashcards
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blue color
answer
Physical
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density
answer
physical
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flammability (burns)
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chemical
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solubility (dissolves)
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physical
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reacts with acid
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chemical
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supports combustion
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chemical
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sour taste
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physical
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melting point
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physical
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reacts with water
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chemical
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hardness
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physical
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boiling point
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physical
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luster
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physical
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odor
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physical
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reacts with air
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chemical
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NaCI (table salt) dissolves in water
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physical
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Ag (silver) tarnishes
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chemical
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an apple is cut
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physical
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heat changes H2O to steam
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physical
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baking soda reacts to vinegar
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chemical
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fe (iron) rusts
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chemical
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alcohol evaporates
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physical
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ice melts
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physical
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milk sours
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chemical
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sugar dissolves in water
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physical
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wood rots
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chemical
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pancakes cook
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chemical
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grass grows
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chemical
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a tire is inflated
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physical
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food is digested
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chemical
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paper towel absorbs water
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physical
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an ice cube is placed in the sun. later there is a puddle of water. later still the puddle is gone.
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physical
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two chemical are mixed together and a gas is produced
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chemical
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a bicycle changes color as it rusts
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chemical
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a solid is crushed to a powder
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physical
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two substances are mixed and light is produced
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chemical
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a piece of ice melts and reacts with sodium
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both chemical and physical
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mixing salt and pepper
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physical
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chocolate syrup is dissolved in milk
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physical
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a marshmallow is toasted over a campfire
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chemical
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a marshmallow is cut in half
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physical
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a student removes a loaf of bread hot from the oven. the student cut a slice off the loaf and spreads butter on it
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physical
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your friend decides to toast a piece of bread, but leaves it in the toaster too long. the bread is black and the kitchen is full of smoke
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chemical
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you forgot to dry the bread knife when you washed it and reddish brown spots appeared on it
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chemical
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you blow dry your hair
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physical
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in baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles. the carbon dioxide bubbles cause the dough to rise
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chemical
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you take out your best silver spoons and notice that they are very dull and have some black spots
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chemical
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a straight piece of wire is coiled to form a spring
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physical
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food coloring is dropped into water to give it color
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physical
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chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a _________ change
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physical, chemical
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in a fireworks show, the fireworks explode giving off heat and light
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chemical
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changing the size and shapes of pieces of wood would be a chemical change
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false
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in physical change, the makeup of matter is changed
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false
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evaporation occurs when liquid water changes into a gas
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true
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evaporation is a physical change
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true
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burning wood is a physical change
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false
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combining hydrogen and oxygen to make water is a physical change
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false
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breaking up concrete is physical change
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true
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sand being washed out to sea from the beach is a chemical change
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false
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when ice cream melts, a chemical change occurs
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false
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acid rain damaging a marble statue is a physical change
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false
