Variables in Scientific Experiments

Coach Cand introduces variables, focusing on dependent and independent types. Through examples like the Boston Marathon, ocean temperature, tree growth, and kitten litters, the video explains how to identify these variables in different scenarios. Students are encouraged to create their own examples for class discussion.

What is a variable in the context of scientific experiments?

• A factor that can change and affect the outcome

• A constant factor that does not change

• A random element with no impact

• A fixed measurement used for comparison

In the marathon example, what is the independent variable?

• The time it takes to run the marathon

• The amount of training the runner does

• The distance of the marathon

• The weather conditions on race day

In the marathon example, what is the dependent variable?

• The runner's age

• The type of shoes worn

• The time it takes to run the marathon

• The runner's diet

In the water temperature example, what is the independent variable?

• The time of day

• The salinity of the water

• The depth of the water

• The type of fish present

In the water temperature example, what is the dependent variable?

• The speed of ocean currents

• The temperature of the water

• The depth of the water

• The color of the water

In the tree growth example, what is the independent variable?

• The amount of sunlight

• The species of tree

• The type of soil

• The amount of water

In the tree growth example, what is the dependent variable?

• The color of the leaves

• The height of the tree

• The age of the tree

• The number of branches

In the kittens example, what is the independent variable?

• The color of the kittens

• The number of kittens in the litter

• The increase in weight of the mother cat

• The breed of the mother cat

In the kittens example, what is the dependent variable?

• The time of year the kittens are born

• The type of food the mother cat eats

• The age of the mother cat

• The number of kittens in the litter

Which of the following is true about dependent variables?

• They change in response to the independent variable

• They are not measured in experiments

• They are manipulated to observe changes

• They remain constant throughout the experiment