For each of the following statements, determine if it describes nuclear fission, nuclear fusion, or both.

A. Fission B. Fusion C. Both Fission & Fusion
30. takes place in stars

31. used for energy via nuclear power plants

32. unstable atomic nuclei become more stable via this reaction

9 answers

30. Fusion
31. Fission
32. Both Fission & Fusion
Which of these statements best explains concern over greenhouse gases?
A. Greenhouse gases are bad, and need to be eliminated.
B. Some greenhouse gases are good, but the increase over the last 150 years means the planet is getting too warm.
C. Some greenhouse gases are good, but the decrease over the last 150 years means the planet is cooling off too quickly.
D. We need additional greenhouse gases in order to keep our planet warm.
B. Some greenhouse gases are good, but the increase over the last 150 years means the planet is getting too warm.
Why are there concerns with the eutrophication of a waterway?
A. an overabundance of nutrients cause an algal bloom
B. blue-green algae can make people and animals sick
C. lack of oxygen in the water can lead to dead zones
D. all of the above
D. all of the above.
How would each of these factors influence the rate of a reaction?

A. speed it up B. slow it down C. would have no effect
35. reduce temperature

36. increase the concentration of reactant

37. crush reactant into smaller pieces
35. Slow it down
36. Speed it up
37. Speed it up
Which of the following is true of nuclear reactions, but not chemical reactions?
A. involves chemical bonds breaking and forming of new bonds
B. involves extremely large energy changes
C. involves changes to the electrons of atoms involved
D. can be represented by a balanced equation
B. involves extremely large energy changes.
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