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WorksheetsSTEM Week 2 Challenge
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
If you want to make a diamond, what would you choose as raw material?
a)
Pencil
b)
Rock
c)
Pan
d)
Water
2.
Which gas is produced during photosynthesis?
a)
Carbon dioxide
b)
Oxygen
c)
Nitrogen
d)
hydrogen
e)
Methane
3.
Which type of reaction releases heat?
a)
Endothermic
b)
Displacement
c)
Decomposition
d)
Neutralization
e)
Exothermic
4.
What happens when you cool water vapor to 0 degree?
a)
Condensation
b)
Sublimation
c)
Freezing
d)
Evaporation
5.
Which pH indicates lemon juice?
a)
2
b)
7
c)
9
d)
12
6.
What is the conversion factor between km/hr and m/s ?
a)
15/8
b)
18/5
c)
5/18
d)
8/15
e)
1
7.
When an inelastic collision occurs, the total kinetic energy of the colliding bodies…
a)
increase
b)
decrease
c)
remain constant
d)
increase then decrease
e)
decrease then increase
8.
A student added Cu, Fe, Ag, Na to a test tube with HCl, what is the final colour of the solution?
a)
green
b)
blue
c)
colourless
d)
pink
9.
In a room, each person shakes hands with everyone else once. If there are 10 people, how many total handshakes happen?
a)
45
b)
50
c)
90
d)
100
e)
110
10.
If 2x=16, what is the value of 2x+1?
a)
8
b)
16
c)
32
d)
40
e)
48
11.
Adam and Brenda have 9 marbles each. Together, they have 8 red and 10 blue marbles. Brenda has twice as many as blue marbles as red marbles. How many blue marbles does Adam have?
a)
3
b)
4
c)
5
d)
6
12.
A secret code is created using a sequence of numbers. The sequence starts with 1, and each subsequent number is the sum of the previous number and the position of the number in the sequence. For example, the first few numbers in the sequence are 1, 3, 6, 10, 15, ... What is the 10th number in the sequence?
a)
55
b)
66
c)
78
d)
91
e)
101
13.
Sally is 54 years old and her mother is 80, how many years ago was Sally’s mother times her age?
a)
41 years ago
b)
31 years ago
c)
40 years ago
d)
51 years ago
14.
Fill in the question mark
a)
21
b)
25
c)
18
d)
4
15.
What is the sum of 25% of 2018 and 2018% of 25?
a)
1009
b)
2016
c)
2018
d)
3027
e)
5045
16.
The diagram shows a rectangle and a line X parallel to its base. Two points A and B lie on X inside the rectangle. The sum of
the areas of the two shaded triangles is 10 cm2?. What is the area of the rectangle?
a)
18 cm2
b)
20 cm2
c)
22 cm2
d)
24 cm2
e)
It depends on the positions of A and B.
17.
The worldwide computer network. Also known as the World Wide Web.
a)
Internet
b)
File
c)
Font
d)
Cursor
18.
A small picture or image that represents an object or program on the computer.
a)
Modem
b)
Network
c)
Icon
d)
Font
19.
How many chromosomes are there in the human body?
a)
23
b)
46
c)
38
d)
102
20.
Which of these is a non-renewable source of energy
a)
Solar
b)
Wind
c)
Biomass
d)
Nuclear
21.
In the magical forest, there live many mysterious creatures. Which of the following statements is correct?
a)
The horn of a unicorn can purify sewage. One unicorn can purify 10 liters of sewage in a day. Three unicorns can purify 150 liters of sewage in 5 days.
b)
The magic trees where the elves live grow 2 meters taller every 3 years. If a magic tree is 5 meters tall now, it will be 9 meters tall after 9 years.
c)
The talking parrots in the parrot group can each remember 5 spells. The number of spells remembered by 5 parrots is 25 more than that remembered by 3 parrots.
d)
The little fairies make magic potions with dewdrops. It takes 4 dewdrops to make 1 bottle of potion. 20 dewdrops can make 6 bottles of potion.
22.
In which pair are both materials magnetic?
a)
aluminium and copper
b)
copper and iron
c)
iron and steel
d)
steel and aluminium
23.
A toy railway engine is driven around a track by a d.c. electric motor. How can the speed of the motor be increased?
a)
use a motor made with fewer turns of wire
b)
use a smaller d.c. voltage
c)
use a stronger magnet in the motor
d)
use the supply with its connections reversed
24.
Match the polynomial for the function:
a)
b)
c)
d)
25.
This is a childhood photo of one of the STEM teachers. Can you identify which teacher it is?
a)
Ms. Yolanda
b)
Ms. Cassandra
c)
Ms. Lilian
d)
Ms. Romy
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