Experimental design

To prove a preconceived idea

To understand a natural phenomenon

To collect as much data as possible

To change multiple variables at once

Purpose

Hypothesis

Data

Prediction

A question and a conclusion

An observation and a measurement

What you think will happen and an explanation why

A plan and a prediction

Starting height

Distance traveled

Ramp angle

Average distance traveled

Average distance traveled

Starting height

Type of car

Driving surface

Yes

No

To make the experiment longer

To ensure the data is varied

To increase the reliability of the results

To make the experiment more complex

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

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?

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.