How to Build
Problem: Can I build a tank that can hold 100g and travel 50 cm?
Hypothesis: I think I can make a tank that can hold 100g and travel 50cm.
Materials and Method:
Step 1:I drew a plan.
Later when you are building you can switch you plan like I did
Step 2:gather your materials –
4 little ping pong size balls
A few pieces of cardboard tape
Skipping rope handles
Step 3: Make the float and test it.
Results: My hypothesis was right. My float held 100g and traveled 50cm down the ramp.