Trimester 3 Unit 1 Flashcards
What is the difference between the density of normal bones versus bones with Osteoporosis?
There is more space between the spongy sections of the bones with Osteoporosis.
How do you improve bone health?
Increase physical activity, get enough calcium, get enough vitamin D, and maintain a healthy weight.
Solid volume units
m3, cm3
Liquid volume units
L, mL
Density
Mass per unit of volume
What is Osteoporosis?
A low density.
What is the formula for density?
Mass/volume
What is normal bone density?
> 833 mg/cm3
What is the density of osteopenia?
833-648 mg/cm3
What is the density of Osteoporosis
<648 mg/cm3
What is the formula for the density of a cylinder?
V=Pir2h
Why is it so hard to climb Mt. Everest?
Limited oxygen, temperature, fierce winds, oxygen decreases by 50%
As we go higher into our atmosphere what happens to the gases?
They will be thinner and cooler
What is the Death Zone?
a level of altitude that will kill you if you stay too long (8000m).
What are the symptoms of altitude sickness?
Pounding headaches, dehydration, loss of vision, struggle to breath.
Why can’t you get warm at high altitudes?
There’s not enough oxygen to get warm
What do we use our atmosphere for?
holds in harmful gases, warmth, to breath.
Why is our atmosphere made of gas?
The components of the air have a very low boiling point
Is the atmosphere a solution, suspension, or colloid?
Solution, everything is evenly mixed.
What is 78% of the atmosphere?
Nitrogen
What is 21% of the atmosphere?
Oxygen
What is 0.93% of the atmosphere?
Argon
What is 0.033% of the atmosphere?
Carbon Dioxide
What is the Thermosphere?
Outer most layer of the atmosphere that blocks deadly radiation and causes northern lights.
What is the Mesosphere?
A cold layer that slows down meteors.
What is the Stratosphere?
The second layer of the atmosphere contains the ozone layer and helps block UV radiation from the sun.
What is the Troposphere?
The closest layer to earth where all the weather takes place.
What happens to the altitude as the air pressure increases?
The altitude decreases.
What happens to the Temperature as the altitude increases?
The temperature decreases
What happens to the gas composition as the altitude increases
The gas composition stays the same.
What is Pressure?
Force and space.
What is the formula for pressure?
force/area.
What do gas molecules exert pressure on?
Their surroundings.
What are the units of pressure?
psi, mmHg, atm, torr
What is the SI unit for force?
Newton (N).
What is the SI unit for Area?
Meter Squared (m2).
What is the SI unit for pressure?
N/m2 (Pascal, Pa).
What is the English unit for Force?
Pounds (lbs).
What is the English unit for Area?
Inch Squared (in2).
What is the English unit for Pressure?
Psi
What causes air pressure in a sealed container?
Air molecules are moving and bounce off the sides of the container. These collisions exert force on the walls of the container.
What is the air pressure at sea level?
101kPa, 1atm, 760mmHg
What is STP?
The standard temperature and pressure (0C&1atm).
What is Boyles Law?
The temperature stays constant.
What happens to the volume in the pressure decreased in Boyles Law?
The Volume increases.
What is the formula for Boyles Law?
P1V1=P2V2
What is Charles Law?
Pressure stays consistant.
What happens to the Temperature if the Volume increased in Charles Law?
The Temperature increases.
What is the formula for Charles Law?
V1/T1=V2/T2 (cross multiply).
How do you find Kelvin?
Celsius + 273
What is Gay Lussacs Law?
Volume stays consistant.
What happens to the Pressure if the Temperature increases?
The Pressure will increase.
What is the formula for Gay Lussaca Law?
P1/T1=P2/T2 (cross multiply).
What is the formula for the Combined Gas Law?
P1V1/T1=P2V2/T2 (cross multiply).
