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1. how do plant fertilisers increase crop yield?
- fertilisers replace essential elements used by previous crop / provide extra essential elements + used to build plant amino acids
- they contain potassium
- fertilisers contain essential minerals
- fertilisers contain essential nutrients
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2. explain one way animals bodies are adapted to reduce heat loss
- thick fur insulates by trapping air particles
- hair traps heat
- behavioural adaptations such as migration
- counter current exchange systems such as hooves
3. Why do scientists publish their results?
- so other scientists can gather further evidence or further their own work. so they can gain credit for their work or so work can be checked
- To keep in a book
- So scientists can use them as decoration
- So people know that work was actually done
4. The energy is faeces can be used by other organisms, describe how?
- broken down by decomposers such as beetles or insects
- eaten by decomposers
- eaten by animals
- used as manure
5. write the balanced symbol equation for N2+H2-->NH3
- N2+3H2-->2NH3
- N2+H2-->NH4
- N2+H2-->N2H2
- N+H-->NH
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