Scientific Variables Quiz

What is a scientific hypothesis?

• A random guess

• A testable statement based on observations

• A proven fact

• An untestable opinion

Tags

NGSS.HS-LS3-2

NGSS.HS-PS1-2

Which of the following is an example of an independent variable?

• The growth rate of plants

• The amount of sunlight plants receive

• The type of soil used

• The height of the plants

In an experiment, what is the dependent variable?

• The variable that is changed or controlled

• The variable that is measured

• The variable that remains constant

• The variable that is hypothesised

What is a controlled variable?

• A variable that is changed to see its effect

• A variable that is kept constant throughout the experiment

• A variable that is measured

• A variable that is hypothesised

Tags

NGSS.MS-PS3-4

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

• The amount of water given to the plants

• The height of the plants

• The type of light used

• The growth rate of the plants

In an experiment to test the effect of temperature on the solubility of a substance, what is the independent variable?

• The temperature of the solution

• The amount of substance dissolved

• The type of substance used

• The volume of the solution

Tags

NGSS.MS-PS1-4

What is the purpose of a hypothesis in a scientific experiment?

• To provide a summary of the experiment

• To make a prediction that can be tested

• To list the materials needed

• To describe the procedure

Tags

NGSS.MS-PS2-2

Which of the following statements is a hypothesis?

• Plants need water to grow

• If plants are given more sunlight, then they will grow taller

• The sky is blue

• Water boils at 100°C

In an experiment to test the effect of different fertilisers on plant growth, what is the dependent variable?

• The type of fertiliser used

• The growth of the plants

• The amount of water given

• The type of plants used

Why is it important to control variables in an experiment?

• To ensure the experiment is fair and results are reliable

• To make the experiment more complicated

• To change the outcome of the experiment

• To test multiple hypotheses at once

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4