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TCAP Prep 5
Test Description: Various questions to review for TCAP
Instructions: Answer all questions to get your test result.
1) Which of these elements is the most reactive?
A
neon
B
helium
C
nitrogen
D
argon
2) How might a scientist accendentally introduce bias into an experiment?
A
by working on a scientific problem at the same time that another research group is working on the same problem
B
by working with several other scientists instead of working alone
C
by having a control group that differs from the experimental groups by only one factor
D
by writing down only the observations that are most interesting to him
3) Which of these is an example of a technology designed to meet an economic need?
A
nuclear power plants that produce electric current
B
a report on a newly discovered species
C
the evergreen forests of the Northwest
D
archeological excavations by university researchers
4) The ability of substances to combine and form new substances is called
A
solubility
B
chemical reactivity
C
malleability
D
physical reactivity
5) The process in which populations die out without leaving descendents is called
A
erosion
B
evidence
C
extinction
D
adaptation
6) What ion is produced in solution by every acid?
A
oxide
B
hydronium
C
hydroxyl
D
hydroxide
7) The universal law of gravitation state that the movements of the planets around the sun depend on
A
the number of moons a planet has
B
the speed at which the planet spins on its axis
C
the composition of the planet
D
the planet's mass and distance from the sun
8) The alkali metals are in group 1 in the Periodic Table. The atoms of alkali metals have 1 electron in the outmost level. Which of the following statements about alkali metals is true?
A
Alkali metals are generally found in their uncombined form.
B
Alkali metals should be stored underwater
C
Alkali metals have low densities
D
Alkali metals are reactive
9) In a laboratory investigation on changes in states of matter, Melissa observes that the melting point of water is 0 Celsius and that the freezing point of water is 0 Celsius. What can Melissa conclude from this observation?
A
both melting and freezing are exothermic reactions
B
melting and freezing can occur at the same time
C
she made an error in her measurements
D
water boils at o Celsius
10) When a chemical reaction occurs, atoms are never
A
vaporized
B
destroyed
C
ionized
D
rearranged
*select an answer for all questions
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