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What else can I help you with?
Does oxygen should have existed for the chemical evolution of life on earth to have occured?
its oxygen
How is theory of evolution of Darwin and Hugo deVries different?
Darwin considered evolution to be caused due to : 1)small changes/variations that occured 2)these variations were directed specifically towards adapting to the environment(directional) 3)evolution was a slow process De Vries believed that evolution occured by: 1)large changes that occured 2)these changes were mutations and were stochastic or random, not directional 3)evolution occured in fits and starts and was not a slow ongoing process
When substances are different from the starting substances what occured?
This is a chemical reaction.
When a substance changes into a difference substance a what change has occured?
chemical change
What are 2 types of evidence that suggest that evolution has occured?
Accept fossil evidence, anatomical evidence, molecular evidence
What happens in a can of spoiled food as gas is produced?
A chemical reaction of food decomposition occured.
When do scientists believe the last ice age occured?
We are in an ice age now. The last glaciation ended about 10,000 years ago depending on which part of Earth you live. There have been many glaciations during the past 2.6 million years.
What battle occurred after treaty of Ghent was signed?
i dont believe a battle occured til later on
What battled occurred after the Treaty of Ghent was signed?
i dont believe a battle occured til later on
When iron is heated until it turns red the color change shows that a chemical change has occured?
False.
When a substance changes into a different substance what change has occured?
Reactants form product(s) during a chemical reactions, generally by oxidation, reduction, hydrolysis, or chemical bonding.
What type of reaction has occured when two or more substances combine to form another substance?
This is called synthesis, a combination chemical reaction that changes the chemical bonds in the substances.
