ecosystems
What is an ecosystem?
A system of living and non-living things interacting
What is always at the start of a food chain?
A producer (like a plant)
What percent of energy moves up each trophic level?
10%
What is pollution?
harmful substances in the environment
What cycle moves water through the environment?
the water cycle
What do we call all the living things in an area?
Biotic factors
What do we call an animal that eats only plants?
herbivores
What is a trophic level?
a step in the food chain towards the top
What is one effect of cutting down forests?
loss of habitat
What gas do plants take in during photosynthesis?
carbon dioxide
What is the role of a decomposer?
Break down dead organisms
What is a food web?
A group of connected food chains
What happens to energy not passed on?
its lost as heat
What is sustainability?
meeting needs without harming the future
What is the process where plants make their own food using sunlight?
photosythensis
How does removing one species affect an ecosystem? (TI)
It can upset the balance and harm other species
(TI)Why are apex predators important in food webs?
they help keep the balance of species in check
(TI) Why are there usually fewer top predators in a food pyramid?
less energy is available at the top
(TI) Why is biodiversity important for ecosystems?
more variety means more stability and resilience
(TI) Why is the water cycle important for life on Earth?
It provides fresh water and supports all living things