It is a physical action of getting oxygen needed for respiration in the body and getting rid of co2
12 of 38
What is respiration?
A chemical reaction used by all living things to produce energy
13 of 38
Glucose
form food
14 of 38
what is excretion?
getting rid of waste in our bodies
15 of 38
Can plants breathe?
Yes, plants can breathe they take in O2 and release CO2. However they don't have lungs or a bloodstream. It is trees that breathe CO2 and release O2.
16 of 38
What is gas exchange?
When o2 passes from the lungs into the bloodstream and elimination of CO2 from the bloodstream to the lungs.
17 of 38
Breathing in
Intercostal muscles + diaphragm contract. Ribs move up and out. Air goes to lungs.
18 of 38
Breathing out
Intercostal muscles + diaphragm relax. Ribs move down and in. Air goes out of lungs
19 of 38
How are lungs adapted for gas exchange?
Large surface area (helps to absorb more O2) Thin walls makes absorption easier. Good blood supply helps gasses pass easy. The lining of lungs are moist helpings gasses dissolve.
20 of 38
Red blood cells
Carry blood through blood vessels
21 of 38
Thermal energy
Internal energy stored in an object measured in Joules.
22 of 38
How is energy transferred through solids?
By conductors
23 of 38
How is energy transferred through fluids?
By convection
24 of 38
What is a hazard?
Something that has potential to cause harm.
25 of 38
What is a risk?
The harm of the hazard.
26 of 38
What is control?
How it is prevented.
27 of 38
What is an independent variable?
What you change in an experiment.
28 of 38
What is a dependent variable?
What you measure in an experiment.
29 of 38
What is a control variable?
A variable that affected the results.
30 of 38
How does sound travel?
Requires particles and has a longitudinal wave
31 of 38
How does light travel?
Travels in transverse waves and can travel through a vacuum.
32 of 38
Power is measured in what?
Watts! LOL
33 of 38
Power=
energy transferred/ time
34 of 38
Efficiency=
useful energy out/ total energy X 100
35 of 38
Energy=
Power X Time
36 of 38
What is Asexual reproduction?
Only needs one parent, usually offspring is identical to parent.
37 of 38
What is sexual reproduction?
When sex cells fuse to form a zygote. Zygotes divide many times into an embryo
38 of 38
Other cards in this set
Card 2
Front
carries impulses to the brain
Back
Optic Nerve- in the eye
Card 3
Front
Helps focus light
Back
Card 4
Front
Contains receptor cells called rods and cones. There are 3 types of cones that each detect a different light: red, green, blue
Comments
No comments have yet been made