Variables Quiz

What is an independent variable?

• A variable that is manipulated or controlled by the researcher in an experiment.

• A variable that is determined by chance in an experiment.

• A variable that is not relevant to the experiment.

• A variable that is measured or observed in an experiment.

Which of the following is an example of an independent variable? a) The height of a plant b) The number of hours of sunlight c) The growth rate of a bacteria d) The temperature of water

• a) The height of a plant

• b) The number of hours of sunlight

• c) The growth rate of a bacteria

• d) The temperature of water.

In an experiment, the dependent variable is the variable that:

• The variable that is manipulated by the researcher.

• The variable that remains constant throughout the experiment.

• The variable that is not relevant to the experiment.

• The variable that is being measured or observed

Which of the following is an example of a dependent variable? a) The number of pages in a book b) The color of a shirt c) The weight of an object d) The type of food in a restaurant

• c) The weight of an object

• d) The type of food in a restaurant.

• b) The color of a shirt

• a) The number of pages in a book

What is the purpose of controlling variables in experiments?

• To introduce bias into the experiment

• To make the experiment more complicated

• To ensure accurate results are not obtained

• To isolate and manipulate specific factors to determine their impact on the outcome.

Which of the following is an example of controlling variables in an experiment? a) Using the same type of soil for all plants b) Changing the temperature during the experiment c) Using different types of seeds for each plant d) Measuring the height of plants at different times of the day

• d

• a

• c

• b

In an experiment, the independent variable is the variable that:

• measured or observed by the researcher

• controlled by external factors

• manipulated or changed by the researcher

• randomly assigned to participants

Which of the following is an example of an independent variable? a) The number of students in a classroom b) The amount of water given to a plant c) The color of a pen d) The size of a bookshelf

• d) The size of a bookshelf.

• b) The amount of water given to a plant

• a) The number of students in a classroom

• c) The color of a pen

What is a dependent variable?

• A dependent variable is the variable being measured or observed in an experiment or study.

• A dependent variable is the variable that is manipulated in an experiment or study.

• A dependent variable is the variable that is controlled by the researcher in an experiment or study.

• A dependent variable is the variable that remains constant in an experiment or study.

Which of the following is an example of a dependent variable? a) The temperature of a room b) The length of a pencil c) The shape of a cloud d) The taste of a food

• a

• d

• c

• b