Pregunta 1
Pregunta
What devices are used to measure mass, volume, density, and weight?
Pregunta 2
Pregunta
For the pendulum experiment what were the Independent and dependent variables?
Respuesta
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Mass, period
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Weight, size
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Time, force
Pregunta 3
Pregunta
Scientific theory is what scientists predict to happen in the future.
Pregunta 4
Pregunta
How many significant figures are in 0.57?
Pregunta 5
Pregunta
Using sig figs, how would you solve 26.9 divided by 3?
Pregunta 6
Pregunta
Percent error is: predicted-true value
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true value
Pregunta 7
Pregunta
Protons add [blank_start]one[blank_end] amu to the atom. Neutrons add [blank_start]one[blank_end] amu to the atom. Electrons add [blank_start]no[blank_end] mass to the overall atom.
Pregunta 8
Pregunta
Properties of metalloids include-
Respuesta
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brittle
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somewhat reactive
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hard
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soft
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unbreakable
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luster
Pregunta 9
Pregunta
What is the last part of the brain to develop?
Respuesta
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frontal cortex
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pre-frontel cortex
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dark matter
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white matter
Pregunta 10
Pregunta
Three methods used to avoid animal-testing?
Respuesta
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in vitro testing
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computer modeling
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volunteer
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insect testing
Pregunta 11
Pregunta
solutions contain a solvent dissolved in a solute
Pregunta 12
Pregunta
molecular compounds in water conduct electric current
Pregunta 13
Pregunta
a characteristic property of a solution is that it can scatter light
Pregunta 14
Pregunta
brass is a solid dissolved in a solid
Pregunta 15
Pregunta
shows the ratio of atoms in a compound
Respuesta
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chemical formula
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element
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mixture
Pregunta 16
Pregunta
Dalton thought the atom was a condense sphere
Pregunta 17
Pregunta
...thought the atom was like a watermelon (scattered electrons)
Respuesta
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thomson
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bohr
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rutherford
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dalton
Pregunta 18
Pregunta
Rutherford said the atom was like....
Pregunta 19
Pregunta
Bohr said the atom had a nucleus filled with protons and neutrons with electrons orbiting around the entire nucleus