Physical changes are usually reversible and does not involve breaking / forming or bonds. Chemical changes, on the other hand, are usually irreversible and the breaking / forming of bonds do take place. Burning of paper produces ash, smoke and also releases heat.
Hummingbird cake is a banana pineapple spice cake common in the Southern United States. Ingredients include flour, sugar, salt, ripe banana, pineapple, cinnamon, pecans, vanilla extract, eggs, and leavening agent.ummingbird cake is a banana pineapple spice cake common in the Southern United States. Ingredients include flour, sugar, salt, ripe banana, pineapple, cinnamon, pecans, vanilla extract, eggs, and leavening agent.
In nature, hummingbirds eat flower nectar for energy and bugs for protein. Flower nectar is 21% to 23% sucrose - regular table sugar - so it is very easy and inexpensive to make. It is a lot harder to make bugs, so I recommend you stick to feeding nectar. Here is the recipe for making hummingbird nectar: Mix 4 parts water to 1 part table sugar in a pan.