Food Chains: Food chain is a model that shows flow of energy and nutrients from one organism to another organism in an ecosystem. ... A food also shows the relation between organisms as who they are related with each other by the food they eat. Plants and animals requires some type of food for survival.
<span>simple organic molecules can form spontaneously under conditions like those thought to prevail early in Earth's history</span>
Answer:
Explanation:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... After ice melts into liquid water, you can refreeze it into solid ice if the temperature drops. Freezing and melting are physical changes.
Answer: Up
Explanation: when an electron goes up it produces more energy which makes light. :)
