At sports day Karen and Elizabeth are chosen by their tutor group to run the 400m relay race. The students
decided that Elizabeth would run better than Karen, who is
a smoker.
Your Assignment:
1) Describe what happens to their circulatory system and breathing
system during and after the race.
2) Explain why each change happens
3) Why is Elizabeth likely to be a better runner than Karen? (think
about the lungs)
Key Words
Heart Lungs Alveoli Artery Capillaries Veins
Oxygen Carbon Dioxide Energy Water Sugar (glucose)
Diffusion Red blood cells Haemoglobin

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table? atom p has an estimated zeff of 7 and is therefore to the left of atom q, which has a zeff of 6. atom p has an estimated zeff of 7 and is therefore to the right of atom q, which has a zeff of 6. atom p has an estimated zeff of 5 and is therefore below atom q, which has a zeff of 4. atom p has an estimated zeff of 5 and is therefore above atom q, which has a zeff of 4.