2. Review: What are some factors that affect the behavior of liquids and gases? Diffusion- mixing of particles Pressure - Pascal’s principle When pressure is applied to a point in a liquid or gas the pressure will travel unchanged through the liquid or gas
3. Density and Archimedes’ principle Every substance (solid, liquid or gas) has a density Density refers to if particles in a substance are closely packed together Density (g/mL)= mass (g) volume (mL) Higher density = particles are packed more closely Lower density = particles are further apart
4. Density and Archimedes’ principle Why do some objects float and others sink? If an object has a density lower than that of the surrounding liquid or gas, it will float OPPOSITE: If an object has a density higher than that of the liquid or gas, it will sink
5. Buoyancy and Archimedes’ principle The idea of buoyancy is that objects tend to float or sink in a liquid Buoyancy is a decrease in weight caused by an upward force in a liquid or gas - Objects have a specific buoyancy Ex: floating in a swimming pool or lake Archimedes’ principle states: An object will sink until the volume of liquid displaced equals the weight of the object (then it will float)
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7. If the boat is sitting low and the line is under the water, the ship is overloaded (too heavy)
