Download Grade 9 Science Exam

Grade 9 Science Exam
January, 2005
Name:
Instructions – Read each question carefully. You must do all of Part I, which
consists of objective questions (fill-ins, multiple choice, calculations, etc.)
Questions in Part II are short answer questions. You will have a choice of
questions to do in this section – be sure to read the instructions carefully, so
you will know which questions you must do. Part III consists of longer, multipart questions. You must do all questions in this section.
Part I – Objective Questions (35 Points)
Fill-ins (25 points)
1. Like charges
and
attract.
2. An electrical charge that does not move is said to be
electricity.
3. Type of asexual reproduction that occurs in bacteria
.
4. Moving electrical charges is said to be
electricity.
5. A device that measures current in a circuit is an
.
6. Three methods fungi use to reproduce asexually are:
(a)
(b)
(c)
7. A device uses for measuring voltage in a circuit is a
.
8. A circuit that has only one path for current to flow is a
circuit.
9. A circuit that has more than one path for current to flow is a
circuit.
10. Two or more cells connected together is a
11. The Watt is a unit of
.
.
12. A KiloWatt is
watts.
13. DC stands for
current.
14. Food-making process of plants
.
15. Three requirements for a circuit to exist are:
(a)
(b)
(c)
16. The name of the process occurring when a cell physically divides after
mitosis has finished
.
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17. Chloroplasts in a plant cell contain this green substance
.
18. The phase of the cell cycle in which the cell is growing and preparing for
mitosis is
.
19. Two methods that animals can use to reproduce asexually are:
(a)
(b)
20. DNA stands for
.
Multiple Choice (10 points)
1. Male and female reproductive organs are generally referred to as
(a) testes
(b) ovaries
(c) gonads
(d) gametes
2. If an organism’s diploid number is 56, then 28 is its
(a) triploid number
(b) haploid number
(c) time to reproduce
(d) age in hours
3. The Greek letter used to measure resistance is:
(a) Gamma
(b) Delta
(c) Beta
(d) Omega
4. Seeds “hitching a ride” on animals is one method of
(a) Seed dispersal
(b) Seed disembowelment
(c) Seed displacement
(d) Seed dispensation
5. Gametes are:
(a) sperm
(b) sex cells
(c) egg
(d) all the above are correct
6. A device that protects circuits from being overloaded is:
(a) series
(b) parallel
(c) fuse
(d) spindle rotor
7. When sperm unites with an egg, this occurs
(a) birth
(b) marriage
(c) fertilization
(d) meiosis
8. A normal household outlet provided this much energy:
(a) 220V
(b) 9V
(c) 1.5V
(d) 110V
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9. AA, AAA and D are all types of:
(a) batteries
(b) cells
(c) outlets
(d) basketball leagues
10. A zygote develops into a(n)
(a) gamete
(b) egg
(c) embryo
(d) diploid cell
Part II - Short Answer Questions (25 points)
Instructions – You must do questions 1,2, 3 and 4. Of the remaining 8
questions, do any 6. Answer all short answer questions in the space
provided. Answer in grammatically correct sentences.
1. Both meiosis and mitosis are distinct cell processes. What is one specific
similarity between these two processes, and one specific difference between
these two processes? (2)
2. Draw a series circuit, using the correct symbols, that consists of: (4 points)
i)
a three cell battery
ii)
a bulb
iii)
a switch
iv)
a resistor
3. Indicate the importance of the following scientists to the study of electricity
and genetics: (3 points)
i)
Georg Simon Ohm
ii)
Watson & Crick
iii)
Benjamin Franklin
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4. An electric heater uses 1100 W of power. Electricty costs $0.08 per kWh.
How much does it cost to operate the heater 3 h a day for 30 days. SHOW ALL
YOUR WORK (4 points)
Do any six of the following eight questions.
5. In a nucleotide that has the abbreviations G and C, what do the letters
represent? (2)
6. What is the human diploid number? How many chromosomes come from
each parent? (2)
7. Calculate the resistance of an appliance that draws 22 Amperes of current
when connected to a 220 Volt source. (2 points)
8. Draw the resistance, voltage, current triangle we used in class to help
remember Ohm’s Law. (2 points)
9. List two renewable energy sources that can be used to generate electrical
energy. (2)
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10. What are two things that can be done at home to conserve electrical energy?
(2)
11. Draw a diagram that shows male gamete formation. Label the two separate
phases of meiosis on your diagram. (2)
12. What is meant by cloning? Give one example of this biotechnology. (2)
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Part III (55 points)
Do all three questions in this section
1. Draw, label and explain the four main stages of mitosis, in correct order
below. (2 points for each accurate drawing, 1 point for each correct stage name,
1 point for each stage in correct placement, 3 points for each accurate
explanation of what is happening during the stage – total points available for this
question = 28)
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2. A student in Grade 9 forgot his drink for lunch, and drank from the container
belonging to one of his friends. That friend had a sore throat caused by
streptococcus bacteria. Under ideal conditions, this strain of streptococcus
divides once every twenty minutes.
(a) Complete the data table to show the number of bacterial cells after 3:40 of
divisions. (5)
Time
12:00
12:20
12:40
1:00
1:20
1:40
2:00
2:20
2:40
3:00
3:20
Exponent
20
Cell Count
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(b) Briefly explain why, or why not you think there would actually be the number
of bacterial cells you found in (a). (2)
(c) Draw a graph that shows how many bacteria there are from 12:00 until 3:00.
(7 points for graph – 2 for labels and 5 for graph format, plotted data pairs and
curve)
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(d) Looking at your graph, what would likely happen to the curve after a few
more hours? What about after a few days? Explain your reasons. (3)
3. The table below contains a set of data for a Nichrome wire resistor. Calculate
the resistance for each row, and enter in the appropriate space. (10 points)
Potential Difference V
1.0
Current I (A)
0.0075
2.0
0.014
3.0
0.020
4.0
0.027
5.0
0.033
6.0
0.040
7.0
0.047
8.0
0.053
9.0
0.059
10.0
0.066
Resistance R ()
On the sheet of graph paper attached, graph the data above.Potential Difference
goes on the x-axis (those are your x-values) and current goes on the y-axis (yvalues). Draw the line of best fit and label your graph.
Score
/115
%
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Grade 9 Science Exam Review – January 2005
Material to study – all material that has been covered, discussed, notes, etc.
should be reviewed. It is the students responsibility to ensure that (s)he has kept
their notes and assignments up-to-date.
Terminology
o
o
o
o
o
o
o
o
o
o
o
o
Attraction and repulsion
Static and current electricity
Embryo
Gametes
Fertilization
Internal and external
fertilization
Cells and batteries
Series and parallel circuits
Watts, kilowatts
Seed dispersal
Binary fission
Ammeter, voltmeter
o
o
o
o
o
o
o
o
o
DNA
Cell cycle
Chloroplast
Asexual and sexual
reproduction
Photosynthesis
Alternating current, direct
current
Budding
Spores
Fragmentation
Short Answer Material
For short answer questions, know, or be able to do the following:
o
o
o
o
o
o
o
o
o
Specific differences between mitosis and meiosis.
Cloning, what it is, with example(s)
Draw a diagram that shows male gamete formation
Use Ohm’s law and the helper triangle
Haploid and diploid cells, and parental genetic contribution
Draw series and parallel circuits
Calculate cost of electricity
Energy conservation and renewable energy sources
Contributions of Georg Simon Ohm, Watson and Crick, and Benjamin
Franklin
Performance
Draw, label and explain the four main stages of mitosis, in correct order.
Exponential cell growth under ideal (theoretical) conditions.
Be able to calculate resistance, and graph resistance.
The exam is eight pages in length, and is to be done entirely on the paper with
the exception of one graph. Review your notes, concentrating on the material
listed above. The exam should take approximately 1.5 – 2 hours to complete.
When you respond, you must do so in complete, grammatically correct
sentences.
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