21. Throw Back Questions:
What do humans produce from the respiration process?
A. Sugar and Oxygen
B. Water, carbon dioxide, and sugar
C. Water, carbon dioxide, and energy
D. Oxygen, carbon dioxide, and energy

22. The independent variable in an experiment is the part of the experiment that….
The investigator measures.
Is the result of the variable that is being changed.
Is the result of the investigator forming an opinion.
Is changed (manipulated) by the investigator.

23. 23.

24. 24.
25. Climate and weather are different concepts, though they are related. How are the concepts of weather and climate different?
Weather refers to conditions nearer to the ground than climate.
Climate is related to the amount of sunlight; weather is not.
Weather conditions include precipitation, but climate does not.
Climate covers larger areas and longer times than weather.

25. Bonus Questions (2 pts. each):
25. What does homogeneous mean?
26. Stars, lightning, neon, and fluorescent light tubes are all examples of ________________.