Density
To calculate the density of an object, you need to divide it's _________ by its ___________
You drop three things into a glass of water: a piece of StyrofoamTM, a piece of oak, and a gold ring. Which will float?
Styrofoam
What is PHYSICAL PROPERTIES OF MATTER?
•Is a characteristic that can be measured or observed without changing what it is.
•Properties you can see, hear, smell, taste or feel
block with measurement of 3cm x 4cm x 6cm. The block has a mass of 184.32g. what is the density of the block?
V = 3cm x 4cm x 6cm = 72cm3
Mass = 184.32g
184.32/72 = 2.56g/cm3
Philippines
Why are fluids able to flow?
Which of the following are fluids?
A) gases only
B) liquids only
C) gases and liquids only
D) solid, liquids, and gases
C = Gases and liquids only
Explain the reasons why the exposed food turns into a brown colour?
•Substance in foods react with oxygen when exposed to air.
•Different substances are formed that give the exposed food a brown colour.
You find a ring with a mass of 107g. You filled a graduated cylinder with 20ml of water. you put the ring into the cylinder. The water rises up to 35 ml mark. What is the density?
V = 35ml - 20ml = 15ml
Mass = 107g
Density = 100g/15ml = total 7.3g/ml
Ms. Castro favourite food?
Sushi
Define: Displacement
•is the amount of space that an object takes up when it is placed in a fluid. The amount of fluid that is displaced by an object is equal to the volume of the object
What does it meant by fluid density?
Fluid Density is the mass per unit volume
What is the main difference between Physical and Chemical Properties?
•A physical property is an aspect of matter that can be observed or measured without changing its chemical composition.Eg. color, mass, volume.
•A chemical property may only be observed by changing the chemical identity of a substance. Eg. Testing reactivity involves seeing what chemical reaction occurs when mixing substances together.
You have 5 list of densities of different fluids. If the fluids were added to a beaker, how would they be layered?
Gasoline = 1.23 density (g/ml)
Maple Syrup = 1.40 density (g//ml)
Dish soap = 0.66 density (g/ml)
Vegetable oil = 1.26 density (g/ml)
Rubbing alcohol = 0.78 density (g/ml)
heaviest in the bottom
Dish soap = 0.66
Rubbing Alcohol = 0.78
Gasoline = 1.23
Vegetable oil = 1.26
Maple Syrup = 1/40
What color is Ms. Castro water bottle?
Blue
What is the difference between mass and volume?
Mass is how much stuff something is made of. Volume is how much space an object takes up.
The _____________method can be used to find the volume of an irregular-shapped object.
Displacement
Give 3 examples of Physical Change and Chemical Change?
Crushing Can, Melting an Ice Cube, Boiling water, Breaking glass, Chopping wood, Shredding paper
Chemical Change
Iron rust, burning wood, metabolism, cooking an egg, Baking a cake, fireworks, rotting banana
A graduated cylinder has a 50g when empty. When 30ml water is added, the graduated cylinder has a mass of 120g. If rock is added to the graduated cylinder, the water level rises to 75ml and total mass is now 250g, what is the density of the rock?
1.78g/ml
what kind of dog Ms Castro have?
Trick question: I do not have a dog
How does density related to fluids?
The density of a liquid determines whether it will float on or sink in another liquid. A liquid will float if it is less dense than the liquid it is placed in. A liquid will sink if it is more dense than the liquid it is placed in.
What density formula and explain the definition of each content?
Mass is a measurement of how much matter is in an object.
Volume is the amount of space that a substance or object occupies
Density mass of a unit volume of a material substance
What is the main difference between Physical and Chemical Changes?
•A physical change in a substance doesn't change what the substance is.
•Water freezing into ice is still H2O
•In a chemical change, there is a chemical reaction and a new substance is formed and energy is either given off or absorbed.
A graduated cylinder containing 50 ml of water has a mass of 70g. As you put the object into the graduated cylinder, the water rises to 80 ml and the total mass increase to 90g. What is the mass, volume, and desnity of the object?
Mass 90g - 70g = 20g
Volume 80ml - 50ml = 30ml
Density: 20/30 = 0.6g/ml
How many sibling does Ms. Castro have?
3 siblings