Density and Fluid Pressure
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Density and Fluid Pressure
Solve the case
Read each situation carefully. Show calculations when asked.
- 180 + 60 = 240 g/cm³
- 180 ÷ 60 = 3 g/cm³
- 60 ÷ 180 = 3 g/cm³
- 180 × 60 = 10,800 g/cm³
- It is more likely to float higher in the salt water.
- It must sink because salt water is heavier.
- Its mass changes as soon as it touches salt water.
- The water's density has no effect on floating.
Interpret the evidence
A team tests one object in different fluids. The object’s mass is 90 g and its volume is 100 cm³, so its density is 0.9 g/cm³.
Fluid
Fluid density (g/cm³)
Observation
Fresh water
1.0
Object floats
Salt water
1.2
Object floats higher
Cooking oil
0.8
Object sinks
Make a safe plan
Use evidence from density and pressure to explain your decisions.
3 printable pages
Page 1
Page 2
Page 3
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