Floating and Sinking

Which best explains why a clay boat will sink?

• Its color

• Its shape

• Its size

Why do some clay objects float?

• Their bottoms are flat

• Their shapes are open

• Their sizes are small

What was the unit of measure for our spring scales?

• Clay balls

• Paper clips

• String marks

• Wire coils

Bill is having a competition with friends to make the best clay boat that floats. Why is he using the spring scale?

• To have a little extra clay

• To make it a fair test

• To make sure the boat floats

• To try out the scale

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Jeff is making a clay boat. Which design will hold the most marbles?

• Less space and higher sides

• Less space and lower sides

• More space and lower sides

• More space and higher sides

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NGSS.MS-ETS1-2

Which of the following BEST describes displacement?

• absorbing some of the water

• sitting on top of the water

• pushing water aside and sinking into it

• letting the water rush into the object

Kera's foil boat is harder to push down than Jeff's boat. What can you best infer about Kera's boat?

• It will hold more marbles than Jeff's boat

• It will hold fewer marbles than Jeff's boat

• It will sink when loaded with marbles

• It will never sink when loaded with marbles

Thinking of the 3 fishing bobbers, which affected buoyancy the most?

• Shape or design

• Size

• Color

What did we use to measure buoyant force?

• Change in water level

• Spring scale

• Temperature

What did we notice about objects when they are submerged in water?

• The objects weigh more when submerged

• The objects have the same weight in and out of water

• The objects weigh less when submerged

• The objects change shape when submerged