Population Dynamics and Experimental Variables

The video tutorial covers 10 common GD science questions, including finding the median and mean of data sets, understanding carrying capacity, identifying independent and dependent variables, calculating probability, recognizing products in chemical reactions, solving combinatorics and genetics problems, and using equations. The tutorial provides step-by-step instructions and examples to help learners understand these concepts, with a focus on practical application and problem-solving skills.

What is the first step in finding the median of a data set?

• Add all numbers together

• Arrange the numbers in order

• Divide by the number of items

• Find the largest number

How do you calculate the mean of a data set?

• Multiply all numbers together

• Subtract the smallest number from the largest

• Find the middle number

• Add all numbers and divide by the count

What does the carrying capacity of a population graph indicate?

• The decline phase of the population

• The maximum growth rate

• Where the population stabilizes

• The initial population size

In an experiment, what is the independent variable?

• The variable that is dependent

• The variable that is changed

• The variable that is kept constant

• The variable that is measured

How do you calculate the probability of an event?

• Subtract the number of favorable outcomes from the total outcomes

• Add the number of favorable outcomes to the total outcomes

• Divide the number of favorable outcomes by the total outcomes

• Multiply the number of favorable outcomes by the total outcomes

In a chemical reaction, what are the products?

• The substances on the left side of the equation

• The substances on the right side of the equation

• The substances that are catalysts

• The substances that are unchanged

How many ways can you choose 3 items from a set of 8?

• 72

• 24

• 56

• 8

What does a Punnett Square help determine?

• The lifespan of offspring

• The number of offspring

• The diet of offspring

• The genetic makeup of offspring

In a genetics problem, what does a capital letter represent?

• A neutral trait

• A recessive trait

• An unknown trait

• A dominant trait

What is the dependent variable in an experiment?

• The variable that is changed

• The variable that is constant

• The variable that is controlled

• The variable that is measured