Christmas Tests 2015 Flashcards
(20 cards)
Functions of cornea
Allows light to enter the eye
What is synovial fluid
A liquid that allows the joint to move more freely
What is the joint in the skull
Brain
How to prevent rusting
Cover material with material to prevent water and oxygen getting on it e.g. Painting
What is the difference between sensory and motor neurons
Sensory neurons send messages to the brain. Motor neurons send messages away from the brain
How does sun go to earth
As the earth rotates, it also moves around the sun
Define malleable
A metal that can be stretched
Define ductile
Able to be deformed with out losing toughness
Covalent bonding
Formed when electrons are shared between non metals
Which comes first zinc copper calcium magnesium
Calcium, magnesium, zinc, copper
Diagram of bulb and conclusion
Bulb. Metal electrons.
Conclusion - didn’t light because covalent compounds don’t conduct electricity
Define molecule
Groups of two or more atoms joined together
Structure of methane
CH4
Covalent bonding examples
H2
H11 H11
1p 1p
0n . - . 0n
Ionic bonding
12 24 Mg. 8 18 O
After
No of protons=12+ No of protons =8+
No of electrons=10- No of electrons=10-
Functions of the parts of the kidneys
Kidneys-remove excess water salts and urea from the blood to form urine. Renal veins-take blood away from kidneys the blood has no waste products. Renal artery-carry urine from the kidneys to the bladder. Bladder-stores urine. Uretha-tube that takes urine from the bladder and passes it out of the body.
What is an antagonistic pair?
Two muscles which have opposite effects
Joints
A joint is where bones meet. Most joints aloe movement to take place. 2 types - moveable and immovable. Immovable- no movement between the bones e.g. Skull. Moveable-ball and socket joints-allow movement in all directions, e.g. Shoulders. Hinge joints-allow movement in one direction only e.g. Elbows. Cartilage-covers the end of bones. Protects end of bones. Reduces friction. Muscles-made of protein. Can get shorter. Attached to bones on either side of a joint. Functions of muscles and joints-allow movement. Tendons connect muscle to bone. Ligaments connect bone to bone.
How to dissect a kidney
Lie kidney flat on its side, cut the kidney length wise from the side.
Safety-be careful with knife clean desk and hands
To carry out an experiment to demonstrate that oxygen and water are necessary for rusting.
A=dry air and nail B=oil and boiled cooled water C=air unboiled water
Conclusion-test tube a and b don’t rust
