Sinking and Floating Investigation
Explore the concepts of sinking and floating through various activities and questions for Grade 3 science.
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Sinking and Floating Investigation
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Read each question carefully and answer to the best of your ability. Some questions may ask you to predict or explain. Good luck!
1. Which of these objects is most likely to float in water?
A metal key
A plastic toy boat
A rock
A penny
2. What makes an object sink?
It is light
It is made of wood
It is heavier than the water it displaces
It has a large shape
1. All objects made of metal will sink.
True
False
2. A hollow object is more likely to float than a solid object of the same material.
True
False
1. If an object takes up a lot of space but is not very heavy, it will likely .
2. The force that pushes up on an object in water is called .
1. Why does a large wooden log float, but a small pebble sinks?
2. Imagine you have a ball of clay. How could you change its shape so it floats instead of sinks?
Match the word to its definition.
1. Float
a. To go down below the surface of water
2. Sink
b. To stay on top of or near the surface of water
3. Buoyancy
c. The upward force that water exerts on an object