4234408
Descrição
Quiz por jujubeeamorde, atualizado more than 1 year ago
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Criado por jujubeeamorde
mais de 8 anos atrás
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Questão 1
Questão
What devices are used to measure mass, volume, density, and weight?
Responda
-
Triple-Beam balance & scale
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mass divided by weight
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graduated cylinder
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beaker
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volume over mass
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mass over volume
Questão 2
Questão
For the pendulum experiment what were the Independent and dependent variables?
Responda
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Mass, period
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Weight, size
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Time, force
Questão 3
Questão
Scientific theory is what scientists predict to happen in the future.
Responda
- True
- False
Questão 4
Questão
How many significant figures are in 0.57?
Responda
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2
-
3
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4
-
1
Questão 5
Questão
Using sig figs, how would you solve 26.9 divided by 3?
Responda
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.9
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9
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900
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.009
Questão 6
Questão
Percent error is: predicted-true value
------------------------------
true value
Responda
- True
- False
Questão 7
Questão
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.
Responda
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one
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one
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no
Questão 8
Questão
Properties of metalloids include-
Responda
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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
Questão 9
Questão
What is the last part of the brain to develop?
Responda
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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
Questão 10
Questão
Three methods used to avoid animal-testing?
Responda
-
in vitro testing
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computer modeling
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volunteer
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insect testing
Questão 11
Questão
solutions contain a solvent dissolved in a solute
Responda
- True
- False
Questão 12
Questão
molecular compounds in water conduct electric current
Responda
- True
- False
Questão 13
Questão
a characteristic property of a solution is that it can scatter light
Responda
- True
- False
Questão 14
Questão
brass is a solid dissolved in a solid
Responda
- True
- False
Questão 15
Questão
shows the ratio of atoms in a compound
Responda
-
chemical formula
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element
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mixture
Questão 16
Questão
Dalton thought the atom was a condense sphere
Responda
- True
- False
Questão 17
Questão
...thought the atom was like a watermelon (scattered electrons)
Responda
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thomson
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bohr
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rutherford
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dalton
Questão 18
Questão
Rutherford said the atom was like....
Responda
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empty space with a positive core
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a cloud of electrons
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electrons surrounding a nucleus of protons and neutrons
Questão 19
Questão
Bohr said the atom had a nucleus filled with protons and neutrons with electrons orbiting around the entire nucleus
Responda
- True
- False
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