Natural science tutorials

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 Flowering and Non-flowering plants Flowering plants Flowering plants  are the plants that grows flowers and use seeds to reproduce, or make more plants like them. Nonflowering plants do not grow flowers, and use either seeds or spores, which are very tiny parts of a plant that can be used to reproduce, to grow more plants just like them. There are three primary kinds of flowers: Annuals, Perennials, and Biennials. In addition, the fourth type of flower behaves in annuals and perennials like a hybrid. Also there are two more kinds of flowers namely shrub flowers and tree flowers.   The picture above  shows  some of the examples  of annual  plants Non-flowering Plants Non-flowering plants ,are the plants that do not produce seeds, fruits or flowers. They usually reproduce through spores. They include the cryptogams and the gymnosperms. However, gymnosperms are a seed-bearing group of plants. They have unenclosed or naked seeds that often produce cones. ...

An organism refers  to having many related parts that function together as a whole. 2. : an individual living thing that carries on the activities of life by means of organs which have separate functions but are dependent on each other : a living person, plant, or animal. There are some difficulties due to the way words such as ‘living’, ‘plants’ and ‘animals’ are used in everyday speech. Students understand ‘living’ in relation to where and how people ‘live’, for example ‘ living in my house’, ‘a dog lives in a kennel’. The students focus on the activity that takes place within a location. Students often do not recognise that trees, vegetables and grass are plants because one everyday use of the word ‘plant,’ refers to small, decorative plants in gardens and nurseries. What are the living organisms? Living organisms are anything that have the characteristics of life, such as reproduction, nutrition, and cellular organization. Examples of living things include humans, animals, inse...

 Characteristic of air Air iss a gas, air can be compressed, that is, the molecules can be moved closer together. If no force compresses the air, it will expand indefinitely to fill the space available. The volume occupied by a given amount of gas varies with the temperature and pressure of the gas. Air as amoving object(WIND) Wind is the movement of air caused by the uneven heating of the Earth by the sun. It does not have much substance—you cannot see it or hold it—but you can feel its force. It can dry your clothes in summer and chill you to the bone in winter. It is strong enough to carry sailing ships across the ocean and rip huge trees from the ground. It is the great equalizer of the atmosphere, transporting heat, moisture, pollutants, and dust great distances around the globe. Landforms, processes, and impacts of wind are called Aeolian landforms, such as sand dunes and Loess deposits, which are deposits of silt. Air under pressure  atmosphere as a large ocean of air s...

 Magnetism is the force that pulls (attracts) or pushes (repels) an object which contains metal towards, or away from, a magnet. A magnet has an area around it over which it can exert a force on objects. The further away the object is from the magnet, the weaker the force. Properties of Magnets are: We already know that magnets are made up of the magnetic substance. Magnets have certain important properties. They are: Attractive Property – Magnet attracts ferromagnetic materials like iron, cobalt, and nickel. Repulsive Properties – Like magnetic poles repel each other and unlike magnetic poles attract each other. Directive Property – A freely suspended magnet always points in a direction.  Forces and fields between  magnets are: The magnetic force is the force of attraction or repulsion that arises between electrically charged particles due to their motion  The magnetic force between two moving charges may be described as the force exerted upon their charge by t...

 Nature of matter  Matter is composed of particles. Differences in solids, liquids, and gases can be explained by the proximity and bonding of particles. When solids, liquids, and gases change state, distances between particles change as the particles absorb or release energy. There is nothing between the particles but space (no air). These are the four main characteristics of particles of matter : *Particles of matter are very tiny in size *They have spaces between them *Particles of matter move constantly *They are attracted towards each other See the diagram below: Do you know what the basic building blocks of matter are called? Well, the basic building blocks that make up matter are called atoms. Sometimes two or more atoms bond, or stick together, and form a molecule. A molecule is the smallest part of a substance that still has all the properties of that substance. For example, a water molecule is made up of two hydrogen atoms and one oxygen atom. Sometimes, a molecule i...