Exploring Science !: April 2013

Year 5 Science- Question 1

21:23 |

Adam carried out an investigation to study the relationship between two animals. The investigation is carried out for five weeks.

Week	1	2	3	4	5
Number of grasshopper	80	70	60	50	40
Number of frog	10	11	12	14	14

a ) What is the purpose ( aim ) of this investigation ?

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b) What is the trend of change in the number of grasshopper as the number of frog increases ?

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c) State on reason ( inference ) about the number of grasshopper based on the

observation in this investigation.

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d) Predict the number of grasshopper in the 8th week.

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My Year 6 Science Pickling Project- Food Preservation

20:55 |

6 Arif's Pickling Project...watch how they had carried out their project with guidance and the end products were so yummy...

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How silk cloth is made ? Year 4 Science

08:37 |

Watch how silk cloth is made from the cocoons of silkworms...

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Silk - Natural Materials in Year 4 Science

08:25 |

What is silk made of ?

silkmoths

silkworms
]

The silkworm is the larva or caterpillar of the domesticated silkmoth, Bombyx mori
( Latin : “ silkworm of the mulberry tree ”). It is an economically important insect being a primary producer of silk. A silkworm’s preferred food is white mulberry leaves, but it may also eat the leaves of any other mulberry tree as well as the Osage Orange.

Osage Orange

Cocoons

Mulberry leaves

The silkworm is entirely dependent on humans for its reproduction and does not occur naturally in the wild. The eggs of the silkmoth take about fourteen days to hatch into larvae, which eat continuously. Their droppings are black. After molting about four times, their bodies become slightly yellow and the skin becomes tighter. The larvae will then enter the pupa phase of their life cycle and enclose themselves in a cocoon made up of raw silk produced by the salivary glands. the cocoon provides a vital layer of protection during the vulnerable, almost motionless pupal state. The cocoon is made of a thread of raw silk from 300 to about 900 meters. The fibers are very fine and lustrous, about 10 micrometers in diameter. About 2 000 to 3 000 cocoons are required to make a pound of silk ( 0.4 kg ).

( adapted from : http ://en.wikipedia.org/wiki/Bombyx.mori )

A silkworm spinning its cocoon

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Microorganisms in Year 5 Science

07:57 |

Amoeba eats two paramecia

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Famous Scientists of Transportations in Year 4 Science

06:13 |

Do you know them ? These are some great scientists who had invented the transports you are using today ...

George Stephenson ( 9 June 1781 - 12 August 1848 ) was an English civil engineerand mechanical engineer who built the first public inter-city railway line in the world

to use steam locomotives, the Liverpool and Manchester Railway which opened in1830. He was renowned as the " Father of Railways ".

Gottlieb Daimler, ( March 17, 1834 - March 6, 1900 ), was an engineer, industrial designer and industrialist born in Schorndorf ( Kingdom of Wurttemberg, a federal state of the German Confederation ), in what is now Germany. He was a pioneer of internal-combustion engines and automobile development. He invented the high speed petrol engine and the first four-wheel automobile.

Karl Friedrich Benz, ( November 25, 1844 - April 4, 1929 ) was a German engine designer and car engineer, generally regarded as the inventor of the gasoline-powered automobile, and together with Bertha Benz pioneering founder of the automobile manufacturer Mercedez Benz.

Henry Ford, who was born on 30 July 1863 on his family's farm in Dearborn, Michigan, was the manufacturer of automobile. Ford incorporated the Ford Motor Company in 1903, proclaiming, " I will build a car for the great multitude. " In October 1908, he did so, he invented the Model T. The Model T heralds the beginning of the Motor Age.

Orville Wright is best known for inventing the airplane, along with his brother Wilbur.

Wilbur Wright is best known for developing the first successful airplane, along with his brother, Orville.

Born four years apart, brothers Wilbur and Orville Wright grew up in a small town in Ohio. They shared an intellectual curiosity and an aptitude for science, at a time when the possibility of human flight was beginning to look like a reality. Together, the Wright brothers developed the first successful airplane in Kittyhawk, North Carolina - and together they became national heroes. Considered the fathers of modern aviation, they developed innovative technology and inspired imaginations around the world.

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Year 6 Science Question - Exercise 3

05:24 |

An investigation is carried out by a group of pupils. Two similar cages are prepared and labelled K and L. One chick is put in cage K while five chicks are put in cage L. All the chicks are of the same size and weight. Equal amount of food and water are supplied to the chicks every day. The observations after one month are recorded in the table below.

Cage	K	L
Average weight of chicks ( g )	1 800	500

a) What is the purpose ( aim ) of this investigation ?

__________________________________________________________________

b) State

i) what is changed ( manipulated variable ) in this investigation.

___________________________________________________________________

ii) what is observed ( responding variable ) in this investigation.

___________________________________________________________________

c) State one relationship between the manipulated variable and the responding

variable.

___________________________________________________________________

d) What is kept the same ( constant variable ) in this investigation ?

_____________________________________________________________________

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Year 6 Science Questions - Exercise 2

08:58 |

A glass of fresh milk was left on the table.

a) Give one characteristic of the milk after being left for two days.

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b) State one reason ( inference ) based on your answer in ( a ).

_____________________________________________________________________

c) What do you think would have happened if the milk had been kept in the
refrigerator ?
_______________________________________________________________________

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Year 6 Science Questions-Exercise 1

08:47 |

Question 1

The table below shows the number of mango slices and the volume of concentrated sugar solution used to preserve the mango slices.

Number of mango slices	10	20	30	40
Volume of concentrated sugar solution ( ml )	50	100	150	200

a) What is the purpose ( aim ) of this investigation ?

______________________________________________________________________

b) State

i) what is kept the same ( constant variable ) in this investigation ?

______________________________________________________________________

ii) what is changed ( manipulated variable ) in this investiagation.

______________________________________________________________________

iii) what is observed ( responding variable ) in this investigation.

______________________________________________________________________

c) State one relationship between the manipulated variable responding variable that can be made in this investigation.

______________________________________________________________________

d) State the preservation method used in this investigation.

______________________________________________________________________

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Quiz Questions

08:17 |

Think carefully before you answer !

1. Name two birds that cannot fly.

2. Name three plants that reproduce through leaves.

3. When was the first telephone being invented ?

4. Name two types of bacteria used in milk culture.

5. Name three types of synthetic fabric.

6. Name three types of epiphyte plants.

7. Name three types of diseases that were caused by virus ?

8. Name three types of edible fungi.

9. Which colour is the best reflector of light ?

10. Name three characteristics of a mammal.

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My Year 6 pupils with their PowerPoint presentations...

07:47 |

Danial with his presentation on " The Effects of Human Activities on the Environment

Edriana with her presentation on " Food Preservation "

Shaqif with his presentation on " Food Preservation "

Pupils watching the PowerPoint presentations...

Well done all my 6 Arif's pupils...I am pleased with your presentations...keep it up ! Thank you for praticipating in this Science PowerPoint Presentation Project.