After these four jars of water are heated by the four identical alcohol lamps for the same period of time, it is realised that the temperatures of the water in the four jars become dif[r]
(1)1 PEOPLE’S COMMITTEE OF THANH OAI DISTRICT
COMMITTEE DIVISION OF EDUCATION AND TRAINING 2019 IMSO Science Competition Question 1: The figure below records the positions of a marble on the road segments AB, BC and CD after a number of equal intervals Which of the following statements correctly describes the moving nature of the marble?
A The marble moves with an increasing velocity on AB B The marble moves with an increasing velocity on BC C The marble moves with an increasing velocity on CD
D The marble moves with an increasing velocity throughout AD
The chosen answer: A
Question 2: In the figure below, two spheres A and B, whose diameters are equal, are both made of aluminum One is a hollow sphere and the other is a solid sphere
Determine which sphere is solid, and how many times larger is the mass of one
sphere compared to the mass of the other?
A A is solid, mA = 1.5mB
B B is solid, mB = 1.5mA C B is solid, mB = 3mA
D A solid, mA = 3mB
The chosen answer: B
D
C B
A
A
(2)2 Question 3: There are four lab jars A, B, C and D, each of which contains water at the same temperature After these four jars of water are heated by the four identical alcohol lamps for the same period of time, it is realised that the temperatures of the water in the four jars become different Which jar contains the water at the lowest temperature?
A Jar A B Jar B C Jar C D Jar D
The chosen answer: D
Question 4: There are friends called A, B, C, D, E and G in a room separated by a wall with holes on it Determine which friend can see the most of the others A Friend A
B Friend B C Friend G D Friend E
The chosen answer: B
A A B B C D
C
E G
D B
(3)3 Question 5: It is more difficult to hear our calls on a high mountain than at the foot of a mountain due to one of the following reasons
A The upper air is cold, so the sound transmission is poorer
B It is sunnier in a high position, so the sound transmission is poorer C The upper air is thinner, so the sound transmission is poorer
D The upper wind prevents the sound transmission
The chosen answer: C
Question 6: The electric circuit includes a light bulb, a switch, wire and a battery to light the bulb In which of the following circuit diagrams does the bulb not glow?
A Figure A B Figure B C Figure C D Figure
The chosen answer: D
+
x
-
K
A
+ -
K
x
B
K
C
+ -
x
K
x
- +