How to Build 

A

Tank

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

Corduroy material 

Cardboard 

Bamboo sticks 

Step 3: Make the float and test it.

 

Results: My hypothesis was right. My float held 100g and traveled 50cm down the ramp.