Rivervale Primary
Science Website
Term 3 Week 1 - 5​
P4 Quiz
Answer:
A) Digested food and water.
B) Small intestine and large intestine.
Answer:
F allows most light to pass through while G allows no light to pass through.
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The shadow is able to be formed on G as F does not block the light coming through the star-shaped hole. However, a shadow is formed on G as it does not allow the light to pass through it.
Answer:
(a) Part E is the anus.
(b) Part A is the mouth while part B is the gullet. Since there is no digestion in the gullet, the amount of digested food and undigested food remains the same.
Question:
Mr Tan poured an equal amount of boiling water into four cups A, B, C and D which are made of different materials before covering them.
After a few minutes, he measured the temperature of water in each cup and recorded the results in a table as shown below.
Which of the cups is covered by the best conductor of heat? Explain your answer.
Answer:
Material C is the best conductor of heat. The cup lost the greatest amount of heat to the surroundings.
Question:
Kyle carried out the following experiment.
He shone torch at the wind chime from different angles. He then measured the length of each shadow formed.
What is the purpose of the experiment?
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Answer:
He wanted to find out how the angle that the torch shines on the wind chimes affects the length of the shadow.
Question:
Which of the following systems is involved when a boy is playing basketball with his friends?
1) Muscular system and skeletal system.
2) Circulatory system, muscular system and respiratory system.
3) Digestive system, respiratory system, muscular system and skeletal system.
4) Circulatory system, respiratory system, muscular system and skeletal system.
Give explanations to support your choice of answer.
​Answer:
4 - Circulatory systen, respiratory systen, muscular system and skeletal system
Explanation: When the boy is playing, he needs to move around so he needs his muscular system and skeletal system to do so. As he is exercising, his body needs to produce more energy so he needs to take in more oxygen (respiratory system) and transport it around the body (circulatory system) for respiration to take place.