Unit 9.2 ECOSYSTEMS

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Frage Antworten
what is sustainability? sustainability means that an ecosystem has the ability to maintain suitable living conditions for the community
What does an ecosystem need to sustain itself? 1. A supply of substances necessary for survival and growth 2. An input of energy, usually from sunlight 3. A wide range of species living in the ecosystem
What does food contain? food contains the matter and energy required by living organisms
What are organisms that make food called producers
Give examples of producers: flowering plants, conifers, moss and algae
Give examples of consumers animals, fungi and humans
how are humans consumers? Humans are consumers because we eat plants directly as vegetables or fruit and we eat animals that depend on plants
How do producers make food? (apart from some bacteria) They make food by photosynthesis
what is photosynthesis the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water
what is the equation for photosynthesis
What is a food chain A food chain is a diagram showing the sequence of organisms feeding on each other
What is the vital group of organisms in any ecosytem Decomposers
Give two reasons as to why we eat food To build new cells needed for growth and repair To provide energy for movement and processes such as generating heat to keep u warm
What are all the connected food chains called? food webs
What is biodiversity Biodiversity refers to the number of different species in an ecosystem and the population of each species
What is a productivity pyramid? A productivity pyramid shows how much energy is used per square metre by each feeding level in a year
What are the four reasons for protecting ecosystems? The four reasons are: CULTURAL VALUE, ECONOMICS, SURVIVAL AND COMPASSION
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