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What happens when soil nutrients finish?
Low yield
What are microbes?
Tiny organisms
What is fermentation?
Anaerobic respiration by microbes DJ
What food is made using bacteria?
Yoghurt DJ
Why heat milk first?
Kill harmful microbes
What is respiration in plants?
Energy release
What is a nutrient?
Substance needed for growth
What is yield?
Crop production
Animal-based fertilizer is called as
Manure DJ
Give one useful microbe
Bacteria
Why cool milk before adding bacteria?
Prevent killing bacteria
Plant-based fertilizer is called as
Compost
What temperature is ideal for yoghurt?
~35–45°C
What happens during yoghurt formation?
Fermentation DJ
What is a culture?
Live bacteria
What energy does solar oven use?
Solar energy
What reflects sunlight in oven?
Aluminium foil DJ
What absorbs heat?
Black surface DJ
What type of energy is converted?
Light → heat DJ
Is solar oven eco-friendly?
Yes
Does solar oven need fuel?
No
What is main advantage?
No pollution
What is limitation?
Needs sunlight
What is an electromagnet?
Magnet with current DJ
What does the magnet attract in the bell?
Armature DJ