That's so dense!
Wait, there's math in science?
Booyah for Buoyancy!
The United States of Matter
Turn up the Volume!
100
What is the formula for density?
D=Mass/Volume or D=M/V
100
You have been given the following measurements of a box. Length = 5cm Width = 2 cm Height = 1cm Calculate the box's volume. Don't forget to include the proper units!
5cm x 2cm x 1cm = 10cm3
100
The upward force exerted on objects submerged in fluids is called the?
Buoyant force.
100
What are the 3 states of matter?
Solids, liquids, gases.
100
Calculating the volume of a regularly shaped solid can be performed using what?
The formula length x width x height
200
The units in which density is measured are?
g/cm3 g/mL g/L kg/m3
200
Using the displacement method you have recorded the following information. Volume of Water = 10mL Volume of Water + Object = 17mL What is the volume of the solid object you have added? Don't forget to include the proper units!
17mL - 10mL = 7mL Volume of Solid Object = 7cm3
200
What units are used when measuring forces?
Newtons (N)
200
Which state of matter has a definite volume but no definite shape?
A Liquid, you can measure the volume of a liquid easily; however, a liquid takes the shape of the container in which it is placed.
200
What instruments can be used to measure the volume of a liquid?
Graduated cylinder, measuring cup or beaker
300
Thinking back to the elevator example. What would happen to the elevator's density if the spaces between the people was increased?
The density would be reduced. More space between the people means that they are less crowded and consequently the elevator is less dense.
300
In the lab you found the mass of an object to be 15g. You then found its volume to be 5cm3. What is the density of this object? Don't forget to include the proper units!
D = M/V D = 15g / 5cm3 D = 3g/cm3
300
When it comes to buoyancy, it can be said that substances that are _____ dense will float above substances that are _____ dense.
Substances that are less dense will float above substances that are more dense.
300
Classify the following items as fluids or non-fluids. AIR PERFUME GRAVEL
Air is a gas and is therefore a fluid. Perfume is a liquid and is therefore a fluid. Gravel is a solid and is therefore a non-fluid.
300
One method used to calculate the volume of an irregularly shaped solid is?
The Displacement Method or the Overflow Method.
400
What is the density of distilled water?
1.00 g/cm3 or 1.00 g/mL
400
The density of liquid mercury is 13.55g/mL. If solid gold, which has a density of 19.32 g/cm3 is placed in liquid mercury, what will happen to the gold?
The gold will sink because its density is greater than that of liquid mercury.
400
We say an object has ____________ buoyancy when the buoyant force is greater than the force of gravity and the object rises.
Positive
400
According to the Particle Theory, the particles in a ___________ are so close together and their forces of attraction are so strong that they cannot flow past one another.
Solid
400
Using the displacement method, how is the volume of the irregularly shaped solid calculated?
First you must measure the volume of water in a container. An irregularly shaped solid can then be added to the container and you can measure the new volume of the water plus the object. To calculate the volume of the object, you must subtract the initial volume from the new volume.
500
Explain, using the particle theory and density, why is it not possible to walk on water?
If you were to step onto the surface of a lake, the water would not support your foot. Instead, your foot would go right through the water. In fact, you would fall right through the water, pushing the water particles out of the way. The particles in a liquid move apart easily, allowing a more dense, solid object, such as your foot to pass through the liquid. Attractive forces between liquid particles are not strong enough to prevent your foot from pushing them apart.
500
If you were given the density of an object as well as its volume, how could you figure out its mass?
D=m/v If you are looking for m you can rearrange the formula to isolate it. The formula would then read, D x V = M
500
How is it possible that a ship made out of steel is able to float?
A steel ship is designed so that the hull is hollow and contains a large volume of air. The overall density (total mass divided by total volume) of the whole ship, including the hollow hull filled with air, is less than the density of water and therefore, the boat can float.
500
The Particle Theory states that...
1. All matter is composed of particles. 2. Particles are in constant motion. 3. There are forces of attraction among particles.
500
How might you be able to calculate the volume of a gas?
The volume of a gas can be calculated by measuring the volume of the container that holds it.
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