A researcher plans to study the effect of temperature on the rate of metamorphosis from tadpole to frog. The researcher sets up two tanks with one tadpole in each. Both tanks are filled with water from a nearby pond. One tank is kept at 15°C and the other at 25°C. How should this experiment be improved? A: use tap water in one tank and pond water in the other
B: keep both tadpoles I. The same tank and vary its temperature
C: use tadpoles of 2 different species
D: have may tadpoles in each tank

What is a universal way that predation benefits the predator? predation increases mate availability. predation in defense of space. the predator gets the energy it needs to survive. the predator keeps parasites from hurting the species.

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water