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56 Cards in this Set
- Front
- Back
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What is Air! |
Air is mixture of different colourless and useful gases,it has no taste and smell,it has weight and takes up space. |
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What are components of air? |
Nitrogen, Oxygen, Carbon Dioxide, Water Vapour and Argon. |
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Nitrogen, Oxygen and other gases take up how much percentage of air? |
79, 20 and 1 |
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What happens when we breathe in Air? |
Respiratory cells utile Oxygen and Carbon Dioxide |
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What is Air pressure? |
The layer that surrounds the earth and presses down on the earth. |
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What measure Air pressure? |
Barometer |
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Three temperature of air? |
Cool,warm and hot. |
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What is atmosphere? |
A layer of gases that surrounds the earth which consists of Air,water and other substances. |
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What does the atmosphere do? |
It acts as shield against sun rays. |
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Why do plants need Carbon Dioxide? |
To make food. |
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What is photosynthesis? |
Is the use of sunlight,water , Air and chlorophyll to make food. |
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Explain fresh air? |
It's cool and clean, it contains plenty of oxygen that our bodies use. |
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Uses of Air. |
Brings sound to ear Used for transportation Make music Recreational Activities Source of Energy Dry clothes Burning of fire ( Air as Oxygen) |
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Air used in emergencies. |
Artificial Respiration - is giving of air to someone who is stop breathing. Eg.CPR |
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What is Air pollution? |
Anything added to air that does not belong,making it unsafe to breathe. |
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Sources of Air pollution - Artificial Pollutants |
Main source of Air pollution - waste from Aeroplane Vehicles Ships Melting of metals Burning garbage Chemical sprays |
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Natural Pollutants |
Dust or sand Pollen from plants Salt from sea Gas from volcanoes |
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How is global warming caused? |
Caused by gas in the atmosphere that causes the world to get warmer |
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Name two uses of carbon dioxide. |
Add fizz to drinks Prevent heat loss from the earth |
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Where is Water found? |
It is found in rain, clouds,sea ,river,lakes, soil,plants and animals. |
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Talk about water. |
Water is odourless and colorless Does not have its own shape Covers 70% of the earth 2/3 of the human body is Water. |
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How do humans loose water? |
From sweat, urine, faeces . |
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Water is needed by Animals to : |
Help in making blood Maintain body temperature Helps with removal of waste |
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What 3 states does water appears in? |
Solid,liquid and gas |
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What is the formula for water? |
H2O |
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Two ways in which Water is useful to the body? |
Drinking Bathing |
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Ways in which Water becomes polluted. |
Throwing garbage in the Sea or ocean Oil spills Waste products from factories |
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Ways to reduce pollution. |
Use reusable containers Get rid of garbage correctly Don't throw garbage in drains Use natural fertilizer Recycle Help to clean up Use fewer chemicals
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What are rocks? |
Rocks are solid materials which come from the crust of the earth. |
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How are rocks formed? |
They are formed by heat or pressure in the earth by action of water. |
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What are rocks made from? |
All rocks are made from minerals,pebbles ,soils and fossils. |
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What are fossils? |
Remains from dead plants and animals. |
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What are the properties of rocks? |
There colors, shapes and textures. |
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Who is a Geologist? |
A scientist who studies rocks,minerals and soils. |
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Name 3 types of rocks. |
Sedimentary, metamorphic and igneous rocks. |
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How are igneous rocks formed ? |
Are formed when molten magma cools and hardens or when lava cools on the surface. |
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What is lava? |
Is molten rock material that reach the earths surface. |
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What builds a volcano? |
Harden lava. |
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Description of Igneous rocks. |
They are usually hard Most are smooth and shiny Some proud with air holes |
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What rocks can form Crystals? |
Igneous rocks |
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Graphite Rocks |
Are smooth with large or small specks. |
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How are Crystals formed? |
When magna stays below the earth and cools slowly. |
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Basalt Rocks |
Are hard and dark colored Basalt is formed from lava that cools slowly on the earths surface. This result in tiny mineral in the rock. |
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Obsidian Rocks |
Looks shiny and feels smooth like glass. Its formed from lava that cools very quickly on the earth surface |
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Sedimentary rocks |
Are layered rocks that are made up of particles and sediments that settle on each other. |
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Description of Sedimentary rocks. |
Vary widely in color,texture and hardness. Texture maybe course or fine depending on the size of then rock particles. |
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Eg. Sedimentary Rocks |
Sandstone, limestone ,shale and breccia. Some Sedimentary rocks are formed from minerals that crystalize and form rocks like Flint and gypsum. |
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Eg Metamorphic Rocks |
Marble |
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What is Water borne diseases? |
Diseases caused by polluted water. Eg. Cholera, dysentery, typhoid and poliomyelitis. |
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What are Air borne Diseases? |
Diseases that are spread through the Air. Normally affects the nose and the lungs. Eg common cold, influenza, chicken pox, mumps and small pox. |
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List things to prevent spreading Air borne diseases. |
Use air filters, do not smoke ,do not breathe in polluted Air |
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Examples of Igneous rocks |
Obsidian, granite, basalt, pumice and gabbro. |
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Meaning of Igneous? |
Produced under conditions involving intense heat. |
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What is metamorphic rock? |
They begin as Sedimentary or Igneous rocks. The change is a result of heat and pressure. Becoming metamorphic there structure and color change. .eg limestone change to marble |
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What is soil? |
Soil has air, water and matter . |
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What is humus? |
Its decayed plants and animals. Humus gives soil a dark color and also provide nutrients that plants and animals need.
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