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- Choose five household objects and find out if they sink or float in water. (Be sure to get permission to put the items in water.) Make a table showing your results.
- John found the ratios for mass to volume for three different-sized blocks from his sister's building set.
- Which blocks will sink and which blocks will float?
- What strategies could you use to find out if the ratios are equivalent?
- Do you think the blocks are made out of the same material? Why or why not?
- An aluminum foil boat in the shape of a box is shown here. The mass of the empty boat is 10 grams.
- How much extra mass can the boat hold before it sinks? Show your work.
- How many pennies will it take to sink the boat if a penny's mass is 2.5 grams?
- Why do you think a submarine can both sink and float in water?
Small block: 7 g/5 cc
Medium block: 14 g/10 cc
Large block: 21 g/15 cc
Medium block: 14 g/10 cc
Large block: 21 g/15 cc
