OSE: Week 4

What is an independent variable in an investigation?

• The variable you change to test its effects

• The variable you keep the same throughout the test

• The variable that you measure as a result of changes

• The variable that has multiple effects in an investigation

Why is it important to control variables in an investigation?

• To ensure that any differences observed are due to the independent variable

• To make the experiment last longer

• To change the outcomes randomly

• To add more complexity to the experiment

How can you identify a dependent variable in an experiment?

• It is what you observe and measure as a result of changing the independent variable.

• It is the variable that stays constant throughout the investigation.

Why do we need to agree on a list of procedures before conducting an investigation?

• To make sure all steps are followed consistently by everyone

• So that each person can do the experiment differently

• To make the experiment shorter

• So that no instructions are missed out

What should you do if your findings do not match the expected results in an investigation?

• Discuss possible reasons for the discrepancy and consider any errors or new variables

• Ignore the unexpected results and write down what you expected to happen.

• Change the data to match your hypothesis

• Stop the experiment immediately.

Why might a cup with a lid keep liquids hot or cold better than a cup without a lid?

• The lid reduces heat exchange between the liquid and the air.

• The lid allows for more air circulation.

• The lid makes the cup heavier, which traps more heat.

• The lid changes the temperature of the air inside the cup.

How is a controlled variable different from a dependent variable?

• A controlled variable remains constant, while a dependent variable is observed and measured for changes.

• A controlled variable is the same as the independent variable.

• A controlled variable changes in response to the dependent variable.

• A controlled variable is the one that gets tested for effects.

If you want to test the effect of adding hot water to different cups to see which one keeps water hot the longest, what is the independent variable?

• The type of the cup

• The amount of water

• The time of recording

• The starting temperature of the water

When conducting a fair test with hot water in different cups, what should you ensure remains constant?

• The amount of water in each cup

• The color of the cups

What would be the dependent variable when testing which cup keeps water hot the longest?

• The temperature of the water over time

• The size of the cup

• The material of the cup

• The lid on the cup