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Soil, texture and acidity
EduBook Organización
- 2450 visitas
Soil texture is determined by the size of its particles and thus how much water it can retain. Sand has the largest particles. Sandy soils retain almost no water, which is not good for plants. Clay has…
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Video: What made Tiddalik laugh?
Esl video Organización
- 3420 visitas
This 6 minute cartoon is a fairy tale about a giant frog, Tiddalik, who drank up all the water in the world. To get it back, the rest of the animals tried to make him laugh. Here we can listen to…
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Match. Rock types
EduBook Organización
- 2294 visitas
Match the definition to the different rock types: Rocks which are made up of grains of sand or mud that are held together by other mineral substances: Rocks which form when magma cools quickly on the…
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Answer. Plant nutrition
EduBook Organización
- 2283 visitas
Remember what you have studied in this section and answer the questions: What is photosynthesis? Why are chloroplasts green? How do algae and mosses get the water and carbon dioxide they need? How do…
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True/false. The atmosphere
EduBook Organización
- 2064 visitas
Are the following sentences true or false? The Earth has always had the same atmosphere. The most abundant components of the atmosphere are carbon dioxide and water vapour. Everywhere in the…
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Choose. Atmospheric phenomena
EduBook Organización
- 2026 visitas
Match each phenomenon with its description: Movement of air from one place to another because of differences in the pressure between the two places. Water droplets and ice crystals that fall from clouds…
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Final self-evaluation 4 - The Hydrosphere
EduBook Organización
- 2021 visitas
Complete the text with the missing words: Water is a very good of all types of solid, and gaseous substances. Living beings absorb many substances for life because they are dissolved in . At the same…
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Comprehension check
EduBook Organización
- 2016 visitas
Answer the questions. What was strange about the fish that Hans caught? What lifted the raft out of the water? Did Axel want to shoot the sea monsters? Which creature won the fight? Why did Axel know…
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Matter and Materials
Carles Escolà Teixidó Familiar
- 1 lo usan
- 1747 visitas
All objects around us are made of matter. Matter is anything that occupies space. We find matter in three different states: solid, like ice, liquid, like water, and gas, like water vapour. We can make…
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Final self-evaluation 1.6 - Matter and Materials
EduBook Organización
- 1902 visitas
Complete the following sentences with the missing words: A group of atoms is called a . move around the nucleus of an atom. are made up of two or more different chemical elements. The formula for is…
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