Flashcards
Unit 9.2 ECOSYSTEMS
Cards in this deck (17)
- 1what is sustainability?sustainability means that an ecosystem has the ability to maintain suitable living conditions for the community
- 2What 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 - 3What does food contain?food contains the matter and energy required by living organisms
- 4What are organisms that make food calledproducers
- 5Give examples of producers:flowering plants, conifers, moss and algae
- 6Give examples of consumersanimals, fungi and humans
- 7how are humans consumers?Humans are consumers because we eat plants directly as vegetables or fruit and we eat animals that depend on plants
- 8How do producers make food? (apart from some bacteria)They make food by photosynthesis
- 9what is photosynthesisthe process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water
- 10what is the equation for photosynthesis
- 11What is a food chainA food chain is a diagram showing the sequence of organisms feeding on each other
- 12What is the vital group of organisms in any ecosytemDecomposers
- 13Give two reasons as to why we eat foodTo build new cells needed for growth and repair
To provide energy for movement and processes such as generating heat to keep u warm - 14What are all the connected food chains called?food webs
- 15What is biodiversityBiodiversity refers to the number of different species in an ecosystem and the population of each species
- 16What is a productivity pyramid?A productivity pyramid shows how much energy is used per square metre by each feeding level in a year
- 17What are the four reasons for protecting ecosystems?The four reasons are: CULTURAL VALUE, ECONOMICS, SURVIVAL AND COMPASSION