8th Grade Quiz: Matter – Flashcards
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In an experiment, explain what may happen if new data are not explained by previous observations.
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Scientists should check that there are no errors in the experiment or faulty measurements. If the data are sound, scientists would need to revise their hypotheses to explain the new data.
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What happens if a scientific theory cannot explain new observations about the original area of study?
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The theory may be revised so that it explains both the existing and the new observations. On occasion, a theory will need to be discarded.
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In ____ solids, the particles are not arranged in a regular pattern.
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amorphous
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A liquid's resistance to flowing is called ____.
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viscosity
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The amount of space that matter fills is its _____________.
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volume
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A state of matter with a definite volume, but no definite shape is a(n) _____________.
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liquid
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A(n) _____________ will always take the shape and volume of its container.
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gas
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The _____________ is a measure of the average speed of the particles in a substance.
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temperature
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The _____________ of a gas is the force of its outward push divided by the area of the walls of its container.
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pressure
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A(n) _____________ has a definite volume but no shape of its own.
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liquid
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True/ False:_____________ Both gases and liquids are fluids.
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True
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True/ False:_____________ All solids have a closely packed, fixed arrangement of particles
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True
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The density of corn syrup is 1.33 g/mL and the density of vegetable oil is 0.91 g/mL. Which liquid(s) will float on water? (Hint: the density of water is 1 g/mL)
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vegetable oil
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The formula for calculating density is
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Mass / Volume
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True/ False: ________ Mass remains constant
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true
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What is the difference between the physical and chemical properties of a substance?
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The physical properties of a substance are the characteristics that can be observed or measured without changing the composition of the substance. Examples include density, hardness, melting point, boiling point, and whether a substance is magnetic. The chemical properties of a substance are any property that produces a change in the composition of matter. Examples include the ability to burn and to combine with other substances.
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The ability to burn is a _________________ (Physical or chemical property).
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chemical property
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A(n) _____________ property is a characteristic of a substance that describes its ability to change into different substances.
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chemcial
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Matter can have many different _____________, or characteristics.
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properties
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A(n) _____________ property is a characteristic of a substance that can be observed without changing it into another substance.
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physical
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Hardness, texture, flammability, and color are all examples of properties of _____________.
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matter
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True/ False: _______ Both physical properties and chemical properties are used to classify substances.
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True
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Define a physical change
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the same substance exists, no new substance has been formed
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Define a chemical Change
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A new substance has been formed as a result
