Waste

Waste

• Waste are things that we  no longer use and would throw away.
• Waste may include materials such as old magazines, old newspapers, boxes, glasses and plastic bottles, metal containers and food residues.
• Food and plants are throw away are known as organic waste.
• We can find these waste from markets and food stalls.
• Chemical waste can come from agriculture, factories and our home.
• Smoke from the burning of fuel in factories and vehicles are waste that are let out into atmosphere.
• The amount of waste produced by human activities is increasing. 
• In some places, the local authorities will provide proper facilities to dispose of the waste.
• We should play our parts to make sure we use the proper ways of disposing of waste.
• Use the bins provided by the local authority to throw our waste.
• It is a good habit to sort our waste into different types before throwing them away.
• Chemical waste can be put into special containers and disposed of appropriately.

Plant Competition

Plant Competition

• Like animal, plants living in the same habitat have to complete for the same factors in order to survive.
• Plants need water, carbon dioxide, sunlight and nutrient to make food.
• Plants get water and nutrient from the soil.
• If there are too many plants growing in the same area, the place will be overcrowded.
• They complete for sunlight, water, nutrient and space.
• Competition can occur among plants of the same species or of different species.
• When competition occurs, the plants that receive enough water, nutrient and sunlight grow better and healthier. 
• Weaker plants may become stunted, wilted or die.

Speed

• A fast moving vehicle takes a shorter time to reach its destination.
• A slower moving vehicle will take a longer time to travel the same distance.
• We can measure how fast or slow an object moves.
• This measurement is called speed.
• What is speed ? Speed involves distance and time.
• If  we know the distance travelled and  the time taken, speed can be calculated using the formula  : speed = distance/ time

Trip to Science Museum Kedah

My Trip to Science Museum Kedah

• 30.09.2012 ( Sunday)my school have a trip to Science Museum in Kedah with my student.
• This is 2 of  1 Science Museum in our country, another one is Science Museum Kuala Lumpur.
• Science Museum Kedah have many interest thing about Science and make us understand many knowledge about Science.
• After this trip, my student more interested in learning Science.
• Let us see something we can meet in this Science Museum Kedah:

Machines Part 2

• Some tools of devices use more than one simple machine, such as scissors.
• A tool or device that has more than one simple machine is a complex machine.
• Example :

Step Ladder - Inclined plane, Screw

Mechanical pencil sharpener - Wedge, wheel and axle

Puncher - Lever, wedge, screw

Scissors - Wedge, lever, screw

 

 

 

• By using the simple machine or complex machine, can help us to do a lot of work and easy.
• Such as :

They use a pair of scissors to cut the paper to make the card .

Machine Part 1

What is Machine ?

• A machine is any tool or device that enables us to do work easily, quickly and conveniently.

• Do you know what is the Machine is he use ? That is one of the complex machines.
• Do you know how the complex machines made it ? They made of the simple machines.
• A simple machine is a tool that allows us to use less force to do work.
• These are seven types of simple machines, that are inclined planed, screw, gear, pulley, lever, wedge and wheel and axle.

What is Force ?

1. All actions involve pushes and pulls.
2. Pushes and pulls are forces.
3. A push is an action of moving an object away.
4. A pull is an action of bringing an object towards us or in the direction we are moving.
5. Expect activity of force :

• The boy slides down because there is a force pulling him.

• A man needs to pull the fishing rod to get the fish out of the water. 

• The roundabout rotates when being pushed.

• The girl on the swing moves forward and then upwards when given a push.

• The girl shoot the ball because there is a force pulling the ball.