Kinetic Molecular Theory of Matter Matter is anything

Kinetic Molecular Theory of Matter

Matter is anything that takes up space and has mass

Fill in the boxes PHASE Volume? Shape? Solid Definite LIQUID DEFINITE INDEFINITE Gas DRAWING Indefinite

Kinetic Molecular Theory (KMT) • The energy of matter is dependent on the temperature.

http: //www. dlt. ncssm. edu/tiger/Flash/phase/Heating. Curve. html GAS TEMPERATURE Condensation Evaporation Freezing LIQUID Melting SOLID ENERGY

FLUID PROPERTIES Density, Viscosity, and Buoyancy

Which do you think would have the greater volume and mass? Why? • 1 kg of feathers • 1 kg of rock

Density is a measure of how tightly packed the molecules are in an object. It is the amount of matter within a certain volume.

To find the density

Triangle Math

To find density: Ex. If the mass of an object is 35 grams and it takes up 7 cm 3 of space, calculate the density. Set up your density problems like this: Given: Mass = 35 grams Volume = 7 cm 3 Unknown: Density (g/ cm 3) Formula: D = M / V Solution: D = 35 g/7 cm 3 D = 5 g/cm 3

Density and liquids →Alcohol →Oil →Water →Dish soap →Corn syrup

Buoyancy : • The upward force exerted by a fluid on an object which makes the object float. buoy

Which object has a greater buoyant force acting on it? Why? The foam block because it is less dense.

Viscosity : • The resistance to flow. (The state of being thick, sticky)

water oil honey Most viscous (slow) Least viscous

What happens to the viscosity of a substance when temperature is decreased (gets cold)? The viscosity will increase/decrease because the particles move faster/slower. https: //www. youtube. com/watch? v=tn 1 Qipnf 8 Ws

What happens to the viscosity of a substance when temperature is increased (gets hot)? The viscosity will increase/decrease because the particles move faster/slower. https: //www. youtube. com/watch? v=tn 1 Qipnf 8 Ws

Reflection: How does the density of a substance change when it changes temperature or changes its state of matter?