Timeline for What makes something food?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 27, 2016 at 11:24 | comment | added | Kelvin | PS. If you don't believe me, check how many calories of energy are advertised on a bottle of water (or air for that matter). ;-) | |
| Apr 27, 2016 at 11:06 | comment | added | Kelvin | One could also say that houses "eat bricks" to get sustenance, but that doesn't make it food. Food is a source of both energy and building blocks. Glucose provides both, but air and water provide no energy. | |
| Apr 27, 2016 at 11:03 | comment | added | Graham Chiu | There's a quote from Richard Feynman floating around in which he says that trees "eat air" to get sustenance. Over 95% of the trees mass is obtained from atmospheric Co2 and water. | |
| Apr 27, 2016 at 10:10 | comment | added | Kelvin | I'm just saying it is more accurate to say that plants make their own food by photosynthesis, and that food is glucose, not "air and water", because there is no energy to extract from air and water: you have to put energy in to get the glucose (food), from which you can then get energy out. | |
| Apr 27, 2016 at 9:51 | comment | added | Graham Chiu | The Cambridge dictionary disagrees with you. | |
| Apr 27, 2016 at 8:40 | comment | added | Kelvin | "Plants use both water and air as food using photosynthesis ... to make glucose." - No, glucose itself is the "food" that is burned with oxygen in respiration, while CO2 and water are used by plants to make the glucose food by photosynthesis with the sun's energy. Water and air could never be described as "food". Food is what you get energy from by oxidation (burning it with oxygen). | |
| Apr 27, 2016 at 7:05 | history | answered | Graham Chiu | CC BY-SA 3.0 |