Semester 1 Final Question Preview (ID: 45142)
Semester Final Study Guide.
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____________________ are the vertical columns on the periodic table whose elements share properties.
a) Non-metals
b) metals
c) periods
d) families
How close measurements are to each other is:
a) accuracy
b) precision
c) hypothesis
d) conclusion
Mashing bananas results in ____.
a) physical change
b) endothermic reaction
c) chemical change
d) no change
How many valence electrons does Calcium have?
a) 1
b) 2
c) 3
d) 4
A scientist experiments with lab rats in a controlled experiment about how the amount of exercise affects the body mass of rats. What is the INDEPENDENT variable of the experiment?
a) amount of food given to the rats
b) type of food given spent exercising
c) length of time spent exercising
d) size of each rats enclosure
Copper, gold and iron all have some of the same characteristic properties. They are all shiny and conduct electricity. They can be hammered into a shape and drawn into a wire. What classification of elements includes copper, gold, and iron?
a) gas
b) metal
c) metalloid
d) non-metal
Which of these is a chemical property of a sheet of paper?
a) The paper can be burned.
b) The paper can be crumpled.
c) The paper does not attract a magnet.
d) The paper does not conduct electricity.
The variable being measured is the _____________________.
a) dependent variable
b) independent variable
c) constant
d) control
All transition elements are ______________________.
a) gases
b) metals
c) liquids
d) metalloids
A(n) ___________________ is the basic unit of matter.
a) electron
b) element
c) atom
d) space
Baking the bread in the oven causes ____.
a) physical change
b) no change
c) chemical change
d) nuclear reaction
A scientist's personal opinions that may affect an experiment is __________________.
a) ethics
b) precision
c) accuracy
d) bias
Elements in Groups 3 through 12 of the periodic table are called ____________________.
a) transition elements
b) representative elements
c) halogens
d) noble gases
An atomic mass of an atom consists of the mass of the ________________________.
a) protons and neutrons
b) protons and electrons
c) neutrons and electrons
d) protons, neutrons and electrons
The ___________ is the standard by which your results can be compared.
a) independent variable
b) dependent variable
c) constant
d) control
A period refers to the vertical columns on the periodic table.
a) True
b) False
c)
d)
Accuracy compares what you measured to the real value or answer.
a) True
b) False
c)
d)
Which item best represents Dalton's image of an atom?
a) cork
b) candy bar
c) marble
d) balloon full of air
Which process is an example of a physical change?
a) burning
b) rusting
c) cutting
d) reacting with acid
Oil will float on water because oil is less dense than water.
a) True
b) False
c)
d)
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