12783979
Description
Flashcards by Latifa Adam, updated more than 1 year ago
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Created by Latifa Adam
almost 8 years ago
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| Question | Answer |
| 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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