A group of students is doing an experiment where they roll a ball down a ramp and then measure how far across the floor it rolls. The factors that are
the same each time are: - the ball - the ramp, including its length and angle
to the surface - where on the ramp the ball starts from The students do
change the type of surface the ball rolls on. What is the independent
variable in this experiment? *
ramp
ball
distance
type of surface

Regarding most of the narrator’s story, which word best describes the tone?

The negative impacts of nonnative species generally outweigh the positive impacts

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