Science Investigations Skills Quiz

What is an independent variable?

• The variable that is measured in an experiment

• The variable that is changed or controlled in an experiment

• The variable that is kept constant in an experiment

• The outcome of an experiment

Answer explanation

The variable that is changed or controlled in an experiment

What is a dependent variable?

• The variable that is measured in an experiment

• The variable that is changed or controlled in an experiment

• The variable that is kept constant in an experiment

• The equipment used in an experiment

Answer explanation

The dependent variable is the variable that is measured in an experiment, making it the correct choice among the options provided.

What are controlled variables?

• The variables that are changed in an experiment

• The variables that are measured in an experiment

• The variables that are kept constant in an experiment

• The variables that are ignored in an experiment

Answer explanation

The variables that are kept constant in an experiment

Why is it important to conduct repeated trials in an experiment?

• To ensure that the results are consistent and reliable

• To use more materials

• To make the experiment more interesting

• To increase the number of variables

Answer explanation

To ensure that the results are consistent and reliable

In an experiment to test how the amount of sunlight affects plant growth, what is the dependent variable?

• The type of plant

• The amount of water

• The amount of sunlight

• The growth of the plant

Answer explanation

In the experiment, the dependent variable is the growth of the plant, as it is being measured to see how it is affected by the amount of sunlight.

Which of the following is a good example of a controlled variable in an experiment testing the effect of fertilizer on plant growth?

• The type of fertilizer

• The amount of fertilizer

• The type of plant

• The growth of the plant

Answer explanation

The correct choice for a controlled variable in the experiment is the type of plant, as it remains constant while testing the effect of fertilizer on plant growth.

What is the purpose of a hypothesis in an experiment?

• To collect data

• To make a prediction that can be tested

• To analyze results

• To write a conclusion

Answer explanation

The purpose of a hypothesis in an experiment is to make a prediction that can be tested, allowing for the scientific method to be followed and conclusions to be drawn based on the results.

Which of the following is an example of a qualitative observation?

• The plant grew 5 cm taller

• The solution turned blue

• The temperature increased by 10°C

• The mass of the object is 50 grams

Answer explanation

The correct choice is 'The solution turned blue' because it describes a qualitative observation based on color change.

Why is it important to wear safety goggles in the lab?

• To look professional

• To protect your eyes from harmful chemicals and debris

• To read instructions clearly

• To see better

Answer explanation

To protect your eyes from harmful chemicals and debris

What should you do if you accidentally spill a chemical in the lab?

• Ignore it and continue working

• Tell the teacher immediately and follow the safety procedures

• Clean it up with your bare hands

• Leave the lab without telling anyone

Answer explanation

Tell the teacher immediately and follow the safety procedures as it is the correct action to take when a chemical spill occurs in the lab.