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Trophic relationships in ecosystems
EduBook Organización
- 3548 visitas
4.1. Matter and energy in an ecosystem In an ecosystem, living things perform different functions in the process of production and transfer of matter and energy. They are divided into: Producers. These…
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Respiration
EduBook Organización
- 2933 visitas
3.1. How do cells obtain energy? In aerobic cellular respiration, nutrients break down in the presence of oxygen and gradually release their energy. This process generates carbon dioxide (figure 1). The…
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Think about it. Feeding and digestion in animals
EduBook Organización
- 2702 visitas
Remember what you have studied in this section and answer the questions: Animals get energy from nutrients. Why do they need this energy? The animals that have evolved the most have hard parts in their…
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Initial evaluation T3 02 - Economic activity in Spain
EduBook Organización
- 2661 visitas
Mark each sentence as true or false: The primary sector is the sector with the least amount of workers in Spain. Wind and solar energy are main energy sources in Spain. Spain imports almost all of the…
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True/False. Groups of waves on the electromagnetic spectrum
EduBook Organización
- 2587 visitas
Answer true or false: All electromagnetic waves can be seen. Ultraviolet rays have more energy than visible light. Ultraviolet rays have more energy than gamma rays. The different colours of visible…
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Video: Catalysis
Tiching explorer Organización
- 3490 visitas
This animation shows how reactions are driven by energy changes and how enzymes, as catalysts, increase the rates at which reactions take place. By hovering with our mouse over the reactions we can…
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Photosynthesis and respiration
EduBook Organización
- 2228 visitas
4.1. Photosynthesis Photosynthesis is the process by which solar energy, absorbed by chlorophyll, is used to convert carbon dioxide and water into glucose and oxygen. water + carbon dioxide + solar…
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True/False. Waves and oscillations
EduBook Organización
- 2089 visitas
Answer true or false: Waves transport matter and energy. Electromagnetic waves do not need a natural medium to travel through. A wave is the transmission of an oscillatory or vibratory motion and of…
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Nutrition: food and nutrients
EduBook Organización
- 1959 visitas
Food Food enters our body through the digestive system. Food is important because: It gives us energy to do our daily activities. We need energy to grow, and to repair our body if we are ill or hurt. We…
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Self-assessment T03 09 - Economic activity in Spain
EduBook Organización
- 1918 visitas
Write the correct word for each definition: The rational use of natural resources in order to meet our needs and the needs of future generations: development. The most important renewable energy source…
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