3.3 What is the pressure of the blood as it enters the heart? High pressure or low pressure? (1)

1.4 Which one describes the structure of vessels R and S correctly? (1)           R S A Thick, muscular wall Thin, muscular wall B Small lumen Large lumen C Thin, muscular wall Thick, muscular wall D Largest blood vessel Small blood vessel    

Beach dunes will be more resilient to erosion and storms if:

3.4 An average adult’s heart pumps 540 litres of blood in one hour. If an adult’s total blood volume is 6 litres, how many times will this blood have to circulate around the body in an hour? (2)

The trade winds, a prevailing circulation pattern, have the flow of air ____________ the equator due to the ________ of air. 

  QUESTION 3     The graph shows blood pressure in vessels. Study the graph and answer the questions.   Right click on the button to open the diagrams in a new window.    

1.2 Choose the correct order that blood would flow from the arm to the lungs. (1)

A consumer eating  producer represents:

Mechanical types of beach renourishment include:

Scientific inquiry uses the scientific method process and requires peer review and replication for validation of scientific work.