EYES
• We have two eyes.
• Eyes are the sensory organs.
• We can see through eyes with the help of light.
• Eyes have eye balls.
• Our eyes are protected by the eye lids, eyelashes and eyebrows.
• The eyebrows prevent water from running to the eyes.
• The eyelids can open and close the eyes to protect from too much light.
• The eyelashes blocked the dust and insects.
• Cornea is a transparent covering in our eyes. It permits light to enter our eyes.
• The iris is colourful part of our eyes.
• Iris control the amount of light entering the eyes.
• Pupil is the black opening in the middle of the eye.
• The tears from watering eyes helps to protect our eyes.
• Keep your eyes clean and moist.
Soil formation
There are four main soil forming factors.They are
*parent material
*climate
*living things
*time
Parent material
Parent material is the substance from which the soil is formed.
Parent materials could be bedrock, organic mterials or old soil surface.
For example the parent matreial of white sand (Dhonveli)mainly corals.
Climate
Climate refers to the average weather conditions over along period of time for a given area. For example the climate of Maldives is Iruvai moosun is mostly warm and humid with occasional rain.
Soil vary depending on the cimate.
Climatic factors that affect soil are
*Temperature
*wind
*Rain
Living things
All plants and animals living in or on the soil can affect soil formation.When these organisms die their remains become organic materials which improve the soil. For example, Earthworms help to decompose(breakdown)waste materials. They also help in the mixing the materials in the soil.
Time
Soil takes years to form. Therefore to keep soil fertile it is important to look after the soil properly.
Agriculture
Maldives has a territorial area of about 9000square kilometers.Of this about 99% is water while the remaining 1% is land. Due to the lack of land space large scale agricultural activities are not practiced in the Maldives.Nearly 95% of thecountry's demand for food is met through imports.
However many grow vegetable and fruit trees within their household compound.Some crops grow in the Maldives include: Brinjal, Tomato, Chillie,Bitter gourd,Breadfruit, Pomegranate,Coconut, Banana, Lemon.
Recent trends in agriculture
In recent years,some farmers and companies have undertaken the growing of fruits and vegetables on a more commercial scale. This change is due to the development of regular market for agricultre and perishable products, both in Male' and in the tourist industry.
Hydroponics
Hydroponics system are becoming more popula in many of the islands in Maldives.In these systems nutrients are circulated in PVC pipe system.
Answer the following questions.
1.Define the following terms.
Hydoponics, Agriculture, Nutrients,
2.Why large scale agriculture is not practiced in Maldives?
3.List some of the crops that are grown in the Maldives?
4.Why imported fruits and vegetables more expensive than those grown in islands?
5.What can we do to reduce te cost of food?
6.Explain how to make compost at home?
However many grow vegetable and fruit trees within their household compound.Some crops grow in the Maldives include: Brinjal, Tomato, Chillie,Bitter gourd,Breadfruit, Pomegranate,Coconut, Banana, Lemon.
Recent trends in agriculture
In recent years,some farmers and companies have undertaken the growing of fruits and vegetables on a more commercial scale. This change is due to the development of regular market for agricultre and perishable products, both in Male' and in the tourist industry.
Hydroponics
Hydroponics system are becoming more popula in many of the islands in Maldives.In these systems nutrients are circulated in PVC pipe system.
Answer the following questions.
1.Define the following terms.
Hydoponics, Agriculture, Nutrients,
2.Why large scale agriculture is not practiced in Maldives?
3.List some of the crops that are grown in the Maldives?
4.Why imported fruits and vegetables more expensive than those grown in islands?
5.What can we do to reduce te cost of food?
6.Explain how to make compost at home?
Growth
All living things grow.What were you like when you were young? What will you like now?
Plants make ther own food using minerals and salts from the soil,sunlight,water and a gas called carbon dioxide from the air.
Plants make ther own food using minerals and salts from the soil,sunlight,water and a gas called carbon dioxide from the air.
Clouds
A cloud has lots and lots of tiny drops of water.When there are many drops of water in the cloud it gets too heavy and fall down as rain.
In other words clouds are the masses of condensed water,when gets heavy precipitates as rain,snow,hail etc
Rain is the best form of precipitation.
Cloud in a bottle experiment.
Night
When it is night,the sun sets and it gets dark.We see the moon very clearly at night.Night is the time we rest.It is more quiet at night than during the day.
Watch this video to learn phases of the moon.
weather
Try to answer the following questions
1.What is weather?
2.Name the two types of monsoons occur in Maldives.
3.How many types of seasons are commonly present in other countries? Name them.
4.Is weather same in all parts of the world?
5."MALDIVES IS HOT MOST OF THE TIME DURING THE YEAR" Why?
Skeletal System
The human skeleton consists of 206 bones. We are actually born with more bones (about 300), but many fuse together as a child grows up. These bones support your body and allow you to move. Bones contain a lot of calcium (an element found in milk, broccoli, and other foods). Bones manufacture blood cells and store important minerals.
The longest bone in our bodies is the femur (thigh bone). The smallest bone is the stirrup bone inside the ear. Each hand has 26 bones in it. Your nose and ears are not made of bone; they are made of cartilage, a flexible substance that is not as hard as bone.
Joints: Bones are connected to other bones at joints. There are many different types of joints, including: fixed joints (such as in the skull, which consists of many bones), hinged joints (such as in the fingers and toes), and ball-and-socket joints (such as the shoulders and hips).
Differences in males and females: Males and females have slightly different skeletons, including a different elbow angle. Males have slightly thicker and longer legs and arms; females have a wider pelvis and a larger space within the pelvis, through which babies travel when they are born.
The longest bone in our bodies is the femur (thigh bone). The smallest bone is the stirrup bone inside the ear. Each hand has 26 bones in it. Your nose and ears are not made of bone; they are made of cartilage, a flexible substance that is not as hard as bone.
Joints: Bones are connected to other bones at joints. There are many different types of joints, including: fixed joints (such as in the skull, which consists of many bones), hinged joints (such as in the fingers and toes), and ball-and-socket joints (such as the shoulders and hips).
Differences in males and females: Males and females have slightly different skeletons, including a different elbow angle. Males have slightly thicker and longer legs and arms; females have a wider pelvis and a larger space within the pelvis, through which babies travel when they are born.
Water cycle
http://www.athena.bham.org.uk/old/WCjumbled.htm
http://www.epa.gov/ogwdw/kids/flash/flash_watercycle.html
How many processes make up the water cycle?
There are six important processes that make up the water cycle.
Condensation - the opposite of evaporation. Condensation occurs when a gas is changed into a liquid.
Infiltration - Infiltration is an important process where rain water soaks into the ground, through the soil and underlying rock layers.
Runoff - Much of the water that returns to Earth as precipitation runs off the surface of the land, and flows down hill into streams, rivers, ponds and lakes.
Evaporation - the process where a liquid, in this case water, changes from its liquid state to a gaseous state.
Precipitation - When the temperature and atmospheric pressure are right, the small droplets of water in clouds form larger droplets and precipitation occurs. The raindrops fall to Earth.
Transpiration - As plants absorb water from the soil, the water moves from the roots through the stems to the leaves. Once the water reaches the leaves, some of it evaporates from the leaves, adding to the amount of water vapor in the air. This process of evaporation through plant leaves is called transpiration.
http://www.epa.gov/ogwdw/kids/flash/flash_watercycle.html
How many processes make up the water cycle?
There are six important processes that make up the water cycle.
Condensation - the opposite of evaporation. Condensation occurs when a gas is changed into a liquid.
Infiltration - Infiltration is an important process where rain water soaks into the ground, through the soil and underlying rock layers.
Runoff - Much of the water that returns to Earth as precipitation runs off the surface of the land, and flows down hill into streams, rivers, ponds and lakes.
Evaporation - the process where a liquid, in this case water, changes from its liquid state to a gaseous state.
Precipitation - When the temperature and atmospheric pressure are right, the small droplets of water in clouds form larger droplets and precipitation occurs. The raindrops fall to Earth.
Transpiration - As plants absorb water from the soil, the water moves from the roots through the stems to the leaves. Once the water reaches the leaves, some of it evaporates from the leaves, adding to the amount of water vapor in the air. This process of evaporation through plant leaves is called transpiration.
Technology around us
grade 4
What is technology?
The role and impact of technology in both our personal and working lives is ever growing. Understanding how people shape technology and how technology shapes people's interactions with each other and the natural world is important not only for those who research, develop and implement new technologies but also for all those people and organisations that have to use those technologies in their working and personal lives.
Technology is not a neutral word. Different people will give it different meaning depending on their viewpoint and context.
Members of the Faculty of Technology are no different but for many years we have adopted one particular definition of technology that reflects our own aims and objectives:
Technology concerns itself with understanding how knowledge is creatively applied to organised tasks involving people and machines that meet sustainable goals. There are three important aspects to this definition:
1. Technology is about taking action to meet a human need rather than merely understanding the workings of the natural world, which is the goal of science. The invention of the microscope was driven by a need to explore the world of the small, beyond our unaided vision. This technological solution to a long standing problem has in turn enabled us to understand more the workings of the world which in turn has led to the development of more technologies.
2. It uses much more than scientific knowledge and includes values as much as facts, practical craft knowledge as much as theoretical knowledge. The iPod is an example of where the physics of making a small device carry so much music is married with creative design to make an iconic must have accessory.
3. It involves organized ways of doing things. It covers the intended and unintended interactions between products (machines, devices, artifacts) and the people and systems who make them, use them or are affected by them through various processes. Many people like to drink coffee, often in a coffee shop. That coffee may have come from trees which have been bred specifically for increased yields that support a small farmer and his family but that requires pesticides that were developed and manufactured in another country. The harvested coffee beans will themselves be transported around the world, to be processed and placed in packages which are are distributed to shops that then make the cup of coffee in a polystyrene cup that was manufactured for the purpose but which then needs to disposed of and so on. Every choice we make relies on, and feeds, a highly interdependent and far reaching way of life where some have much and some have little.
Technology is a hands on, can do profession where poeple have to be skilled in many of the following: engineering, communicating, designing, developing, innovating, managing, manufacturing, modelling, and systems thinking. But technology also gives us various products which can be used for good or ill or where the benefits are disputed and similarly the processes involved in producing and using technology means that we should all take an interest in whether it provides us and eveyone else with a sustainable future.
What is technology?
The role and impact of technology in both our personal and working lives is ever growing. Understanding how people shape technology and how technology shapes people's interactions with each other and the natural world is important not only for those who research, develop and implement new technologies but also for all those people and organisations that have to use those technologies in their working and personal lives.
Technology is not a neutral word. Different people will give it different meaning depending on their viewpoint and context.
Members of the Faculty of Technology are no different but for many years we have adopted one particular definition of technology that reflects our own aims and objectives:
Technology concerns itself with understanding how knowledge is creatively applied to organised tasks involving people and machines that meet sustainable goals. There are three important aspects to this definition:
1. Technology is about taking action to meet a human need rather than merely understanding the workings of the natural world, which is the goal of science. The invention of the microscope was driven by a need to explore the world of the small, beyond our unaided vision. This technological solution to a long standing problem has in turn enabled us to understand more the workings of the world which in turn has led to the development of more technologies.
2. It uses much more than scientific knowledge and includes values as much as facts, practical craft knowledge as much as theoretical knowledge. The iPod is an example of where the physics of making a small device carry so much music is married with creative design to make an iconic must have accessory.
3. It involves organized ways of doing things. It covers the intended and unintended interactions between products (machines, devices, artifacts) and the people and systems who make them, use them or are affected by them through various processes. Many people like to drink coffee, often in a coffee shop. That coffee may have come from trees which have been bred specifically for increased yields that support a small farmer and his family but that requires pesticides that were developed and manufactured in another country. The harvested coffee beans will themselves be transported around the world, to be processed and placed in packages which are are distributed to shops that then make the cup of coffee in a polystyrene cup that was manufactured for the purpose but which then needs to disposed of and so on. Every choice we make relies on, and feeds, a highly interdependent and far reaching way of life where some have much and some have little.
Technology is a hands on, can do profession where poeple have to be skilled in many of the following: engineering, communicating, designing, developing, innovating, managing, manufacturing, modelling, and systems thinking. But technology also gives us various products which can be used for good or ill or where the benefits are disputed and similarly the processes involved in producing and using technology means that we should all take an interest in whether it provides us and eveyone else with a sustainable future.
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