Answer:
The correct answer is c) a chemical change, because a gas was produced.
Explanation:
Sometimes when performing scientific experiments in laboratories, chemical changes are obtained in the elements that have been used, a chemical change is an alteration in the structure of a compound, so the element is different than at the beginning of the experiment.
Generally, when there is a chemical change this is usually irreversible; For example, in the case of Nio, he experiments with yeast, water, and sugar, which puts it in a bottle and closes it with a balloon, this mixture of substances has resulted in a chemical change since the element is transformed in gas.
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Answer:
meiosis
Explanation:
During meiosis, a single cell divided 50% of it's chromosomes. This process ensures that the sperm and egg contain only 50% of the chromosomes of an organism.
Answer:
cities and states are the correct answers
Answer:
Dr. Edward is using longitudinal research method.
Dr. Janice used cross-sectional research method.
Explanation:
The longitudinal and cross-sectional research methos are observational research methods in which researchers observe their subjects without making any changes in an environment.
The longitudinal research method is the one in which researchers record the changes in traits of the subject or the target audience. The longitudinal research method is the one in which researchers observes their subject over a period of time which may extend upto many years.
The cross-sectional research methos, on the other hand, is the research method in which researchers compare various target audience all at the same time. The researchers perform this research only at one time unlike longitudinal research method.
In the given scenario, Dr. Edward has used the <u>longitudinal research</u> method as he observed the subject over a period of time, whereas Dr. Janice used <u>cross-sectional research method</u> as she studied her various subjects all at the same time.
Answer:
Conserve.
Explanation:
According to Piaget's framework, Ernesto can't conserve and Lara can <em>conserve</em>. According to Piaget's Theory of Cognitive Development conservation of matter is a process. Ernesto has seen the changes in the dough but he thinks there is more matter. On the other hand, Lara has seen the changes too, but she realized that the amount of dough is the same before and after the changes. No dough was added or taken from the original amount. This is called reversibility and is a necessary condition to acquire conservation.
