Sunlight - uv
Yes, it is a chemical reaction.
no!
Because a chemical reaction has different sign's. And heat is one. But if the temperature is dropping then it is not going through a chemical change.
Yes, the reaction in photosynthesis can be both endergonic and exergonic. The overall process of photosynthesis is endergonic, requiring energy input from sunlight. However, individual reactions within photosynthesis can be exergonic, releasing energy as they proceed.
It is caused from acid rain and the reaction of the chemical going into the atmosphere.
A change of temperature implies that some energy has been transfered or used. Since chemical reactions either require or release energy to occur, the environment may change temperature as the substances react.
The formular for that reaction is C2O + H2O = C2H2O if you do not take concentrations of substances going into the reaction.
The reaction going on in the meatloaf through the cooking process is known as the Maillard reaction. The Maillard reaction is a chemical reaction between amino acids and reducing sugars that gives browned foods their desirable flavor. Examples of this reaction are through general browning of meats, such as searing steak.
Chemical properties describe how a substance behaves in a chemical reaction, such as its reactivity, ability to react with other substances, and changes in composition. These properties are determined by the substance's chemical composition and structure.
Antioxidant -- a chemical added to food to stop it going bad by reaction with oxygen in the air
Because there's a chemical reaction going on.
A chemical reaction is one that changes the chemical properties of a substance. Sublimation is just going from solid to a gas and is only a change of state.