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Published byJohnathan Heydon
Modified over 6 years ago
B4 e-h Pig
What’s wrong with this food chain?
Arrows pointing wrong way
How do you work out biomass?
Number of organisms x average (dry) mass
List 2 ways energy is lost as you move up a food chain
Some parts don’t get eatenSome lost as faeces Some used in respiration (movement, keeping warm etc)
Why can farmers make more money by keeping battery hens in cages than they can from free range?
Less energy is lost in moving and keeping warm so farmers can feed them less
Name 2 biofuels
Biogas (methane) Bioethanol Wood
How do you make biogas?
Fermentation By bacteria In a digester
Why do farmers use pesticides?
So pests don’t eat crops(Less of the crop’s energy is lost to pests is a better answer)
What is biological control?
A natural predator eats the pest
What are the advantages of biological control?
No toxic chemical Useful insects not harmed Top predators not poisoned
What 3 conditions do decomposers need to grow?
Oxygen Water Warmth
Why does adding sugar or salt preserve food?
Removes water using osmosis
Name 2 uses of decomposing microbes?
Making compost Breaking down sewage
How does carbon get into plants?
List 3 ways carbon is put back into the atmosphere?
Respiration by animalsRespiration by plants Respiration by decomposers (decomposition) Combustion
Why is there more carbon dioxide in the atmosphere in the winter?
Less photosynthesis (fewer leaves)More combustion (heating)
What other element is recycled in nature?
Intermediate 1 Unit 3a & b Photosynthesis, Respiration & Fertilisers
B4 Revision 113 Questions GCSE Gateway Biology B.
Humans and Environmental Change
B1.5 Energy in biomass Pyramids of biomass Energy transfers Decay processes Carbon cycle Recycling organic waste.
Carbon and Nitrogen Cycles. 2 of 46© Boardworks Ltd 2007.
1.5 Energy & Biomass 1.6 Waste Materials
INTERACTIVE MULTIPLE CHOICE QUESTIONS Organisms and their environment
Energy and Nutrient Transfer Food chains and Food webs Objectives: *Describe a food chain and each feeding stage in it **Distinguish between a food chain.
Exposure to air Moisture (water) Temperature Salt Soil Light.
Every living thing needs energy in order to survive. Every time animals do something (run, jump, move) they use energy to do so. Plants don’t move, so.
1 of 46© Boardworks Ltd of 46© Boardworks Ltd 2007.
Carbon Cycle. The carbon cycle is a biogeochemical cycle in which carbon is cycled throughout the earth. Carbon cycles throughout plants, animals and.
Food chains and Food webs
How is an organism’s energy role determined in an ecosystem?
B4 It’s a Green World Biology Revision. 4a Who Planted that there? Plants carry out photosynthesis in leaves: Leaves are adapted by: Broad – large s.a.
I. Energy Flow A. Producers / Make their own food through photosynthesis using sun, water, and carbon dioxide / Plants, algae A. Producers / Make their.
Modes of Nutrition Autotrophs have the ability to make their own food by the process of photosynthesis (write the word equation) Some bacteria use chemosynthesis.
NUTRIENT CYCLING Science 10. Nutrient Cycles Because Earth is a closed system (i.e. there is little or no input of new material – we have what we have),
A single path that shows how each living thing gets it’s food. The flow of energy begins with the SUN and transfers through the chain. Always starts with.
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