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Test the properties of air
EduBook Organización
- 4632 visitas
What is air? Air is a mixture of gases. It forms the atmosphere around us. Air is made up of two main gases: nitrogen and oxygen. It also has other gases, including water vapour and carbon dioxide.…
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Match. Forces and their characteristics
EduBook Organización
- 3684 visitas
Match the types of forces with their characteristics. The force is perpendicular to the surface and if the surface is horizontal, its magnitude is equal to the weight of the object. Objects held by…
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Self-evaluation 2 - Weather and climate
EduBook Organización
- 3650 visitas
Which concepts do the following definitions refer to?: It is the degree of warmth in the air due to solar radiation. It is a gaseous layer more than 1 000 kilometres thick that surrounds the Earth. It…
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Answer. Romanesque painting and sculpture
EduBook Organización
- 3649 visitas
Remember what you have studied in this section and do the activities: What are the different parts of the design of a Romanesque church? What is the significance of the shape? Look at the drawing of a…
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Let's learn how to... - Matter and materials
EduBook Organización
- 3123 visitas
Use measuring instruments What do we need? A tape measure or a ruler. Digital scales. A test tube with water. A nail. A cork. A marble. A pencil. What do we do? You are going to measure the length,…
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Check. Forces in everyday life
EduBook Organización
- 3016 visitas
Remember what you have studied in this section and answer the questions: Give three examples of when friction acts. In each case, state whether the friction is an advantage or a disadvantage. What is…
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Complete. Atmospheric conditions
EduBook Organización
- 2953 visitas
Choose the best word to complete the following sentences: is the weight of the air on the planet's surface. Atmospheric pressure depends on and . Warm air weighs less and is less dense, which makes…
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Analyse. Study the law of the lever
EduBook Organización
- 2944 visitas
A lever is a simple machine consisting of a bar which pivots on a turning point or fulcrum. Using a lever and applying a force (F) to the longest arm (the part of the bar from the fulcrum to where the…
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Video: Calculate your Body Mass Index (BMI)
Tiching explorer Organización
- 1 lo usan
- 5045 visitas
This 3 minute animated video explains what Body Mass Index is and what BMI means. We can also calculate our ideal BMI with the the interactive Body Mass Index calculator inside the video. Someone who is…
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Video: What is AIDS
Tiching explorer Organización
- 4662 visitas
AIDS is the most dangerous sexually transmitted disease. In this 3 minute video we have a brief look at what AIDS is, how the HIV virus is transmitted, and what we can do to protect ourselves against…
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