Friday, October 17, 2014

More explanations written by students in Grade 4/5

We are concentrating on using the explanation structure and including accurate information that is written in our own words.

Next week the students will write an explanation on their own. They have selected the form of energy they wish to explore further and will research with a partner but will use this information to create their own piece of writing.

Here are some more examples of students work...


What is the Water Cycle?


The water cycle is also known as the hydrologic cycle.The water cycle is the journey of water on earth. The water cycle is a continuous cycle.
Evaporation is the first part of the process. A liquid (water) turns into a gas (a cloud or water vapour).To evaporate the water from oceans, rivers, streams and lakes, the water cycle using the sun's heat and energy.

Condensation is the opposite of evaporation. Water vapour in the air gets cold and changes back into liquid, forming clouds. Condensation is very crucial to the water cycle because it is responsible for the water vapour to turn back into liquid.

Precipitation is when the water droplets in the clouds get cold and start to come together. Then the droplets of water get too heavy for the cloud to hold, they fall from the clouds on to the earths surface.

Infiltration is when rainwater soaks into the soil and stops when it hits a layer of rock, creating an underground stream.  Part of this water will be used to water the plants. another part of this water will keep going further into the ground.

Runoff is water, from rain, snowmelt, or other sources, that flows over the lands surface, and is a major part of the water cycle. Runoff that occurs on surfaces before reaching a channel is also called overland flow.

Transpiration is when plants release water from inside the plant on to their leaves that then evaporates into water vapor. Plants will get the water from the underground water. Around 10% of the water vapor in the atmosphere is estimated to come from transpiration.

In conclusion there are 6 parts of the water cycle, evaporation, condensation, precipitation, infiltration, transpiration and runoff. The water cycle is one of the most important cycles because we need water to survive and we wouldn't be able to get water.



Molly, Moneth & Ella


What Is Gravity?

Gravity is a force that is very important.
Gravity was discovered by a man named Isaac Newton in 1687.

Gravity is a force that pulls  us down to the earth’s core. Gravity also pulls all the planets so they don’t float away in space. The Earth’s gravity keeps the moon spining around the Earth and is the reason we have night and day.

The Earth Core is like a magnet and gravity is a force pulling us down to the earths core. We can stand and walk around and it helps us so we don’t float away.

The pull of gravity gives you weight. The weight of an object tells how much gravity is pulling on it. We would weigh a different amount if we were on another planet.

In conclusion gravity is very important on earth and in the universe.

BunLeng, Panhaboth & JC




What is lightning?

Lightning is an electric current. Most of the four million lightning flashes that occur on our planet each day start from inside thunderclouds.

To make this electric current, first you need a cloud.
When the ground is hot, it heats the air above it. This warm air rises. As the air rises, water vapour cools and forms a cloud. When air continues to rise, the cloud gets bigger and bigger. In the tops of the clouds, temperature is below freezing and the water vapour turns into ice. The cloud becomes a thundercloud. Lots of small bits of ice bump into each other as they move around. All these collisions cause a build-up of electrical charge. Eventually, the whole cloud fills up with electrical charges. These charges are released causing lightning.

There are three primary types of lightning. The first from a cloud to itself. This is called intra-cloud. The second is  from one cloud to another cloud and the third is between a cloud and the ground.

Although lightning is always accompanied by the sound of thunder you do not always hear the thunder. Distant lightning may be seen but may be too far away for the thunder to be heard. There are also different colours of lighting. While the vivid white light we associate with lightning comes from gas in the atmosphere.

There are dangers associated with lightning but lightning strikes rarely come as a 'bolt out of the blue'. We do get warning sounds. As a storm approaches, its location can be estimated by noting the difference in time between lightning flashes and the rumble of thunder. The light appears almost simultaneously, while sound travels at a speed of 1 km per 3 seconds. A six-second delay means that the storm is about two kilometers away. Lightning strikes are quite frequent on summits and other projections such as pinnacles, because lightning takes the shortest route to earth.

In conclusion lighting can be dangerous to humans. It has different types and colours. Lightning happens in all countries in the world. Make sure always stay clear of lighting because it can hurt you.

Did you know_lightning


JULIAN



The cheetah is the most fascinating animal because it is the fastest land animal in the world.                     
The colors of a cheetah are yellow, tan, black and brown. The size of a cheetah iS 77 to 144 kilograms. . The average lifespan of a cheetah is 10-12 years.

When a cheetah is hunting its prey it walks towards the animal. It does not start running until the prey starts running. When cheetahs are chasing their prey cheetahs overtake their prey, running past them. They are very fast. Then they turn back and kill their prey. The top speed of a cheetah is 112 kph (70 mph). Cheetah females run slower when they have a baby in their belly. They are very quiet. Cheetahs do not roar.

Cheetahs are also fascinating because they hunt in the day unlike other big cats that hunt in the night. The reason they hunt in the day is so that the other big cats that live in the grasslands won’t come and steal their food. Cheetahs are carnivore so they eat meat. They will eat any meat but the most common meat they eat is gazelle, hare and wildebeest.

For these reasons it is clear that Cheetahs are very interesting animals.

 

Helen & Emily




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