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TAKS Review #2
Test Description: Objective 4
Instructions: Answer all questions to get your test result.
1) Swimmers can foat more easily in ocean water than freshwater. The most likely reason is that the
A
density of ocean water is higher than pond water
B
mass of ocean water is greater than pond water
C
viscosity of pond water is greater than ocean water
D
temperature of pond water is lower than ocean water
2) What is the mass of a 500 ml sample of seawater with a density of 1.025 g/ml?
A
487.8 g
B
512.5 g
C
625.0 g
D
500.0 g
3) An unknown powder has a constant melting point and doesn't chemically separate into other substances
A
a compound
B
a mixture
C
an element
D
an alloy
4) Rust forms on an iron pipe after prolonged exposure to humid air. What type of change is this?
A
physical
B
chemical
C
mechanical
D
nuclear
5) What are the coefficients that will balance PbO2 yields PbO + O2
A
2, 2, 1
B
3, 4, 2
C
4, 3, 2
D
2, 1, 1
6) The structure of pure water makes it a good
A
nutrient
B
catalyst
C
conductor
D
solvent
7) Which bike rider has the greatest momentum?
A
A 70 g person riding at 15 Km/h
B
A 50 kg person riding at 35 km/h
C
A 40 Kg person riding at 45 km/h
D
A 60 kg person riding at 25 km/h
8) All the following are in DNA except
A
phosphate
B
nitrogen
C
carbon dioxide
D
deoxyribose
9) Ultraviolet radiation can cause mutations in the DNA of skin cells. Why won't it effect offsprings ?
A
only changes to gamete DNA can be inherited
B
offspring reject parental skin cells
C
mutations must occur within the RNA codons
D
changes in skin cell DNA are homozygous recessive
10) Single celled organisms from pond water with a nucleus and either cilia or flagella belong to
A
Animalia
B
Protista
C
Plantae
D
Fungi
*select an answer for all questions
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