Answer:
B.
Explanation:
The dependant variable is the one being tested
Answer:
26. Coal is burned at a power plant
27. In dams.
28. Gas heater.
29. Nuclear power plant.
Explanation:
Coal is burned at a power plant where Chemical energy is converted into thermal and then into electrical current. In dams, water falls from higher altitude in which Gravitational potential is converted to kinetic energy by revolving of turbines which produces electrical current. in heater, electrical energy is converted into radiant and also heat or thermal energy while the nuclear thermal energy is converted into electrical energy and this happen in the nuclear power plant.
Answer:
Cells typically communicate using chemical signals.
Explanation:
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D. Growing and reproducing
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Answer:
The unique features of the human hand can be viewed as adaptations for throwing and clubbing