The combining of two isotopes of a light element such as hydrogen to form a heavier nucleus, releasing energy in the process, is called ____.
A. nuclear fission
B. hydrogenation
C. nuclear fusion
D. reprocessing
E. a control rod reaction
Answer: C
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Sedimentary structures form prior to lithification
a. True b. False
Why do scientists formulate hypotheses?
A) to explain the problem that accounts for existing data and predict additional phenomena that should exist B) to state a law C) to explain something that cannot be observed or measured by scientific procedures D) to generalize data and observations about data without necessarily offering an explanation
An average of _______________ named hurricanes form annually in the Atlantic Ocean and Gulf of Mexico
Fill in the blank with correct word.
In Central and South America, people are more likely to protect the natural environment because they are learning that __________.
- they will pay high fines or be sent to prison if they travel into these regions - the natural environment provides most of their basic needs - natural environments prevent the formation of damaging weather systems such as hurricanes - most of these systems are a major source of carbon dioxide