Experimental design

What is the primary goal of a scientific investigation?

• To prove a preconceived idea

• To understand a natural phenomenon

• To collect as much data as possible

• To change multiple variables at once

Which of the following is NOT one of the initial three elements to consider when starting an investigation?

• Purpose

• Hypothesis

• Data

• Prediction

What two main components should a good hypothesis include?

• A question and a conclusion

• An observation and a measurement

• What you think will happen and an explanation why

• A plan and a prediction

Which of the following is a controlled variable in the car ramp experiment?

• Starting height

• Distance traveled

• Ramp angle

• Average distance traveled

In the car ramp experiment, what is the independent variable?

• Average distance traveled

• Starting height

• Type of car

• Driving surface

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Why is it important to conduct multiple trials and average the results in an experiment?

• To make the experiment longer

• To ensure the data is varied

• To increase the reliability of the results

• To make the experiment more complex

Based on the data collected in the car ramp experiment, what is the relationship between starting height and distance traveled?

• As starting height decreases, distance traveled increases

• Starting height has no effect on distance traveled

• As starting height increases, distance traveled increases

• Distance traveled is inversely proportional to starting height

What is the primary question being investigated in this experiment?

• How does the size of an ice cube affect its melting time?

• How do different materials affect ice melting?

• What is the optimal room temperature for melting ice?

• Which type of ice cube tray melts ice the fastest?

What is the prediction regarding the melting time of ice cubes on different materials?

• Ice cubes will melt faster on non-metallic materials.

• Ice cubes will melt at the same rate on all materials.

• Ice cubes will have a shorter melt time on metals compared to non-metals.

• Ice cubes will melt slower on metallic materials.