What must be true of the concentration of potassium and sodium inside the neuron? Why can some ions move across membranes but others cannot? How would permeability change if types of channels in a neuron change? What is the purpose of having leak and gated channels for the neuron? What are the charges both inside and outside of the neuron before you click the stimulate neuron button? What are the charges both inside and outside of the neuron after the simulation is complete? What happens to the charge during the stimulation? What happens after the gated channels close? How many potassium ions move into the cell while how many sodium ions move out of the cell? What does the yellow line represent that runs along the neuron?

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. before you conduct your experiment, you need to form a hypothesis. a hypothesis is a prediction of what you think will happen in the experiment. the hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur.record your hypothesis here: record the results from step one of the experiment (dropping the objects in the air): first trial: second trial: third trial: record the results from step two of the experiment (dropping the objects in a vacuum): first trial: second trial: third trial: did the experiment support your hypothesis? using the data from your experiment, describe why you believe your hypothesis was either proven or disproven.what forces were acting on the objects dropped in the air? what force was acting on the objects dropped in the vacuum? part two: comparing forceschoose two forces and compare and contrast these forces. you must provide two ways that they are alike and two ways that they are different. you may make a list, write in paragraph form, or make a chart.choose two forces and compare and contrast these forces. these must be different forces than used in the prior question. provide two ways that they are similar and two ways that they are different. you may make a list, write it out, or make a chart.

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?

Everything that surrounds a particular organism