Science pt2 Flashcards
What is decomposition?
The process of breaking down
What is synthesis?
The process of putting things together
What is solubility?
The amount of solvent that be can be dissolved into a solute
What is a pure substance?
It is an element that is made up of only one component
What is a heterogeneous mixture?
It is a mixture where you can see the different components with a naked eye
What is a homogeneous mixture?
It is a mixture where you can’t see the different components
Chemical changes (6)
Formation of precipitate/ change in colour/ formation of gas/ mold or rust/ release or absorption of heat/ emission of light
Energy (10)
Kinetic energy: thermal energy/ mechanical energy/ electrical energy/ magnetic energy
Potential energy: chemical energy/ elastic energy/ nuclear energy / gravitational energy
What is a multiview projection?
A projection showing all sides of an object (2D)
What is an Isometric projection?
3D view of an object as the point and three visible sides that are no on the plane or the paper no side facing towards you
What is an oblique projection?
View of an object that has only 1 face in the paper plane (facing you) while the other sides are out of the paper
What are the different types of fossils?
- Petrified
- Cast/Mould
- Body
- Trace
Where are fossils found?
Found in Sedimentary rocks
How are fossils and stratigraphic layers connected?
Both principals apply to fossils as well. Fossils found in the same layer are from the same time period. Older fossils are in the deeper layers .
What is relative dating?
Method used to place fossils in order without finding their exact age
What is absolute dating?
Method used to find the age of fossils in years.
What is a stratigraphic layers
It is a layer of sedimentary rocks that formed in the same time period.
What is the law or superposition?
Older layers at the bottom and younger layers at the top.
What is the law of original continuity?
All sedimentary rocks contained in a single stratigraphic layer formed in the same time period.
How do we mechanically and chemically digests food?
Mechanically: We chew it and the stomach squeezes and churns the food
Chemically: acids and enzymes turn food into liquid form.
What is role of the stomach?
The stomach digest mechanically and chemically
What is the role of the small intestine?
The small intestine finishes chemical digestion and the absorbs nutrients into the blood.
What is the role of the large intestine?
- Absorbs needed water from the food
2. Package undigested food into waste.
Why do we eat?
1) energy
2) body sustainability & growth
3) body & tissue repair
How many calories are in each substance?
1g fat -> 9cals
1g protein-> 4cal
1g carbs -> 4cals
What nutrients gets burned first?
First: Sugar&carbs
Second: fat
Third: protein (degrades your muscles to create energy)
What is the role of Auricle?
It is the visible part of the ear and it receives sounds and directs them to the auditory canal
What is the role Auditory Canal?
A tube lined with fine hairs and glands that secrets earwax and Carrie’s the sound waves to the ear drum
What is the role of eardrum?
A thin membrane that vibrates when struck by sound waves
What is the role of the ossicles?
Three small bones that vibrate in response to the vibrations of the ear drum. They sometimes amplify the vibrations
What is the role of the Eustachian tube?
A tube connecting the ear to the pharynx. Balances the air pressure on both sides of the ear drum
What is the role of the cochlea?
Receives and transforms the vibrations coming from ossicles into a nerve impulse to be sent to the cerebrum.
What is the role of the vestibular nerve?
Carries the nerve impulse from the semi-circular canals to the cerebrum to help with the balance.
What is the role of the auditory nerve?
Carries the nerve impulse from the cochlea to the cerebrum to allow us to hear
What are the role of muscles?
Stabilizes joints/maintaining posture/producing movement/moving substances in the body/stabilizing body position/producing heat
Which type of muscles controls voluntary movements?
Skeletal muscles
Which type of muscles controls involuntary movements?
Smooth and cardiac
Where are the muscles located?
Smooth muscles -> inside organs
Cardiac muscles -> heart
Skeletal muscles -> muscles
