12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Code
Country
Signature
I. Chemical Oxygen Demand (COD) Test
Questions
Points
Answers
(Show your working)
I-1-1
0.5
x=
I-1
(Show your working)
I-1-2
0.5
z=
Page 1
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Code
I. Chemical Oxygen Demand (COD) Test (Continued)
Questions
Points
Answers
(Show your working)
I-1-3
0.5
y=
I-1
(Show your working)
I-1-4
0.5
x=
Page 2
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 3
Code
I. Chemical Oxygen Demand (COD) Test (Continued)
Questions
Points
Answers
(Show your working)
I-2-1
1.0
f=
I-2
(Show your working)
I-2-2
1.0
Number of moles =
mol
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 4
Code
I. Chemical Oxygen Demand (COD) Test (Continued)
Questions
Points
Answers
(Show your working)
I-2-3
1.0
COD =
ppm
(Show your working)
I-2
I-2-4
2.0
Amount of C6H6 =
Volume of CO2 =
mg/L
L
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 5
Code
I. Chemical Oxygen Demand (COD) Test (Continued)
Questions
Points
Answers
(Show your working)
I-2-5
1.0
Moles of Cr3+ right before titration :
mol
Moles of Cr3+ after titration :
mol
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 6
Code
I. Chemical Oxygen Demand (COD) Test (Continued)
Questions
Points
Answers
(Show your working)
I-3
2.0
Compound Name :
COD =
ppm
------------------------------------ DO NOT WRITE BELOW ------------------------------------
Total points for question I
12th International Junior Science Olympiad
Daegu, Republic of Korea
Theoretical Competition
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 7
Code
II. Ski Jumping
Questions
Points
Answers
Forces
0.25
Gravitational force
0.25
Normal force
0.25
Air resistance
II-1
(Show your working)
II-2
1.5

Choose one for each force from ① to ⑧
12th International Junior Science Olympiad
Daegu, Republic of Korea
Theoretical Competition
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 8
Code
II. Ski Jumping (Continued)
Questions
Points
Answers
(Show your working)
II-3
1.5
t
(Show your working)
II-4
1.25
D=
------------------------------------ DO NOT WRITE BELOW ------------------------------------
Total points for question II
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Code
III. Thomson’s Cathode-Ray Experiment
Questions
Points
Answers
(Show your working)
III-1
1.0
u=
III-2-1
1.0
Choose one from ① to ③
III-2-2
1.0
Choose one from ① to ③
III-2
(Show your working)
III-3
1.5
u=
Page 9
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 10
Code
III. Thomson’s Cathode-Ray Experiment (Continued)
Questions
Points
Answers
(Show your working)
III-4
0.5
e/m =
------------------------------------ DO NOT WRITE BELOW ------------------------------------
Total points for question III
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 11
Code
IV. Excretory System
Questions
Points
IV-1
1.0
Answers
X
IV-2
Y
1.5
g/100mL
X
IV-3
Z
g/100mL
Y
g/100mL
Z
1.5
------------------------------------ DO NOT WRITE BELOW ------------------------------------
Total points for question IV
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 12
Code
V. Genetics
Questions
Points
V-1
1.0
Answers
Multiple Choice
(Choose one from ① to ⑦)
(Show your working)
V-2
1.0
Probability :
V-3
1.0
Sequence
[5’----
----3’]
------------------------------------ DO NOT WRITE BELOW ------------------------------------
Total points for questions V
12th International Junior Science Olympiad
Theoretical Competition
Daegu, Republic of Korea
Time : 3 hr 30 min
December 6, 2015
Points : 30
ANSWER SHEET
Name
Page 13
Code
VI. Blood Circulation
Questions
Points
Answers
Left semilunar valve
(Mark either ‘○’ or ‘×’ )
VI-1
1.0
Left atrioventricular valve
(Mark either ‘○’ or ‘×’ )
t1
t2
(Show your working)
VI-2
1.0
Heart rate:
beats/min
(Show your working)
VI-3
1.0
Cardiac output :
L/min
------------------------------------ DO NOT WRITE BELOW ------------------------------------
Total points for question VI