Floating and Sinking Experiment Worksheet
What you do (Float or sink?): 1. Fill a tub with water on a towel, with an adult nearby. 2. Guess “float” or “sink” for each object and write it in a table. 3. Gently place each object on the water and write what happens. 4. Press the sinking clay into a boat shape and try again; wipe up spills.
NameDateTime takenScore ___ / 40
- 1.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a towel for spills (c) a tub of water (d) a magnet
- 2.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) the tub of water (c) whether it floats
- 3.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a mirror (c) a tub of water (d) small test objects
- 4.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we measure it (b) we change it (c) we keep it the same
- 5.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we keep it the same (b) we measure it (c) we change it
- 6.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to keep children safe (d) to win a prize
- 7.🥚 A fresh egg sinks in plain water. What makes it float? (a) more plain water (b) a little shaking (c) lots of salt stirred in (d) a few ice cubes
- 8.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is kept the same. (a) False (b) True
- 9.True or false: a magnet is needed for the float-or-sink test. (a) True (b) False
- 10.🧺 Which of these is needed for the float-or-sink test? (a) a balloon (b) a magnet (c) a results table (d) yeast
- 11.🛟 Which of these floats on water? (a) a coin (b) a piece of thermocol (c) a glass marble (d) an iron nail
- 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is the one thing we change. (a) True (b) False
- 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the kind of clay (b) the tub of water (c) whether it floats (d) the shape of the clay
- 14.🔍 Which is the odd one out? (a) a steel spoon (b) a pebble (c) a ball of clay (d) a cork
- 15.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we keep it the same (b) we measure it (c) we change it
- 16.🌊 What pushes a floating cork upward? (a) the cork itself (b) the tub (c) the water (d) the air above
- 17.🔍 Which is the odd one out? (a) an iron nail (b) an ice-cream stick (c) a ping-pong ball (d) a piece of thermocol
- 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is the one thing we change. (a) True (b) False
- 19.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is the one thing we change. (a) True (b) False
- 20.🔍 Which is the odd one out? (a) a piece of thermocol (b) an ice cube (c) a coin (d) a ping-pong ball
- 21.🛟 Does a coin float or sink in water? (a) sinks (b) floats
- 22.🔍 Which is the odd one out? (a) a metal key (b) a ping-pong ball (c) a glass marble (d) a pebble
- 23.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is what we measure. (a) False (b) True
- 24.True or false: small test objects is not needed for the float-or-sink test. (a) True (b) False
- 25.🧺 Do we need turmeric powder for the float-or-sink test? (a) not needed (b) needed
- 26.🛟 Which of these floats on water? (a) a metal key (b) an ice cube (c) a pebble (d) an iron nail
- 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) False (b) True
- 28.🛟 Which of these sinks in water? (a) a piece of thermocol (b) a pebble (c) an ice-cream stick (d) a cork
- 29.🛟 Does a ball of clay float or sink in water? (a) floats (b) sinks
- 30.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a battery cell (c) a results table (d) a tub of water
- 31.🧺 Do we need a balloon for the float-or-sink test? (a) not needed (b) needed
- 32.True or false: a balloon is not needed for the float-or-sink test. (a) True (b) False
- 33.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
- 34.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is what we measure. (a) True (b) False
- 35.🧊 Why does an ice cube float on water? (a) water is sticky (b) ice is magnetic (c) ice is less dense (d) ice is very cold
- 36.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) wipe up spills at once (c) leave water on the floor (d) play near a deep pond
- 37.True or false: a ping-pong ball floats on water. (a) False (b) True
- 38.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) whether it floats (b) the shape of the clay (c) the amount of clay
- 39.True or false: a tub of water is needed for the float-or-sink test. (a) True (b) False
- 40.🛟 Does a pebble float or sink in water? (a) floats (b) sinks
Answer key
- a magnet
- the tub of water
- a mirror
- we change it
- we keep it the same
- to keep children safe
- lots of salt stirred in
- True
- False
- a results table
- a piece of thermocol
- False
- whether it floats
- a cork
- we measure it
- the water
- an iron nail
- False
- False
- a coin
- sinks
- a ping-pong ball
- True
- False
- not needed
- an ice cube
- True
- a pebble
- sinks
- a battery cell
- not needed
- True
- needed
- False
- ice is less dense
- wipe up spills at once
- True
- the amount of clay
- True
- sinks
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