Births and deaths are always happening in a population. How does the number of births and deaths in a population affect its size? To find out, try these missions:

Mission 1: Make the population size stay the same over time.
Mission 2: Make the population size increase over time.
Mission 3: Make the population size decrease over time.

Add 14 tokens to the circle on the Token Model Population Circle sheet to start with a population of 14 organisms.
Every year 1, 2, or 3 organisms must die and 1, 2, or 3 organisms must be born. How many is up to you and your partner.

To make an organism die, remove it from the population and add it back to the cup. Count this as one death.
To make an organism be born, add one token from the cup to the circle. Count this as one birth.
Repeat until you have modeled 6 years.
At the end of every year, record the number of births, deaths, and organisms on the chart and plot the number of organisms on the graph.
At the end of 6 years, add up the total numbers of births and deaths and record it in the total column.
When the population size stays the same over time, the total number of births the total number of deaths.
When the population size increases over time, the total number of births the total number of deaths.
When the population size decreases over time, the total number of births the total number of deaths.

1. list three scientific reasons cockroaches may fly.

98 points 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 forces choose 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.

Describe the magnitude of the buoyant force