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Final self-evaluation 2 - The Atmosphere
EduBook Organización
- 1656 visitas
Are the following sentences true or false? The atmosphere is 1024 km thick. Oxygen makes up 21% of the atmosphere. The exosphere reaches areas of the atmosphere where there is no air. The ionoshphere is…
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Complete. Smoking
EduBook Organización
- 1660 visitas
Complete this text with the correct words: Cigarette is a very dangerous pollutant. It contains gases such as carbon . Cigarettes also contain an addictive drug called . Cigarette smoke is bad for…
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Observe. Blood and its components
EduBook Organización
- 1629 visitas
Look at this microscopic view of a drop of blood, and answer these questions. How many different kinds of blood cells can you see in the photo? What shape is each of the blood cells? What is the most…
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True/false. Mixtures
EduBook Organización
- 1596 visitas
Decide if the following statements are true or false: Seawater is a homogeneous mixture, because we cannot see the individual components. ➝ Granite is made up of different components which all look…
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Investigate. Light travelling
EduBook Organización
- 1587 visitas
When the Moon moves between the Sun and the Earth, its shadow is projected onto the Earth. This happens because light travels in straight lines. What is this phenomenon called? What happens when the…
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Properties of matter: mass, volume and density
EduBook Organización
- 1555 visitas
Matter Matter is the substance that an object is made of. Our body, this book, a blackboard, a pencil, bread and an apple are all made up of matter. All matter has two physical properties: mass and…
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Self-assessment T12 08 - Light and sound
EduBook Organización
- 1470 visitas
Complete these sentences with the correct words: Sound is produced when objects . We perceive sound because we use our sense of . If there is no material nearby, sound does not travel. An happens when…
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Final evaluation 10 - Matter: Mass, Volume and Density
EduBook Organización
- 1395 visitas
An empty can of soda has a mass of 25 g. When it is full of soda, the total mass is 300 g. If we know that the volume of the can is 250 mL, calculate the density of the soda.
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Did you know?
EduBook Organización
- 1343 visitas
Just as with the standard kilogram, there is a standard metre at the International Bureau of Weights and Measures, near Paris. However, nowadays this length is not taken as the standard metre measure.…
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Self-evaluation 2 - Rivers and seas
EduBook Organización
- 3790 visitas
Complete the following sentences on water in nature: Most of the planet's water is and it is found in and . The Earth's fresh water is found in lakes and , in the humidity of the ground, in…
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