1. The substance which is responsible for attaching with oxygen in red blood cells is called
………………………………….. .
2. The diagram shows a model of part of the human respiratory system.
a. In the model, the rubber that stretches represents the diaphragm.
Suggest which parts of the model represent each of these parts of the
body:
1) the trachea _______________
2) the rib cage _______________
3) the lung _________________
4) The diaphragm _______________
b. Describe what happens to the volume of the chest cavity when the
diaphragm stretches downwards.
__________________________________________________________
c. Name the other muscles rather than the diaphragm which help in
breathing.
__________________________________________________________
3.
a. Complete the word equation for aerobic respiration.
____________+___________
_______________ + ____________
b. Name the part of lungs from which oxygen diffuses into the blood.
__________________________________________________________
4. The equation for speed is 𝑆𝑝𝑒𝑒𝑑 =
𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒
𝑇𝑖𝑚𝑒
5. This is a distance/time graph for a train journey between two stations, A and
B.
Use the graph to answer these questions.
State the distance between station A and station B.
_______________ km
State the time between station A and station B.
______________ h
6. The diagram shows a force of 10 N pulling to open a door.
The distance from the hinge (pivot) to the door handle is 0.8 m.
10 N
The diagram is drawn from above.
Calculate the moment caused by the 10 N force on the door.
Show your working.
__________ N m
7. Hamad pumps air into the tyre of a car. The pressure of the air in the tyre is
higher than the pressure of the air outside the tyre.
Explain what causes the pressure of the air inside the tyre.
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
8. Complete: Equal in size and opposite in direction, forces are called balanced
forces. While, different in size and same in direction called unbalanced
forces.
9. Elements in the same group on the periodic table often share similar
chemical properties. Based on this observation, the part of an atom is MOST
likely responsible for these similarities is OUTER ELECTRONS.
10.
a. The symbol for a fluorine atom is F. the symbol for a
fluorine ion is F-. while symbol for chlorine atom is Cl and chlorine ion is Cland so on.
b. How are the electrons in an atom held in place?
____________________________________________________ .
c. Use the information from the table given about group 1 to answer the
question below.
Element
Atomic number Mass number
Lithium
3
7
Sodium
11
23
As the atomic numbers increase, what happens to the
Melting point
180
90
melting point?
___________________________________________________________
11. From the element given in the diagram answer the question below.
24
Draw a diagram showing the structure of the atom and write the electronic
structure.
___________________________________________________________
___________________________________________________________
___________________________________________________________
12.What is the general name given to the elements in Group 1, Group 7 and
Group 8 of the periodic table?
___________________________________________________________
13.A silver item is marked 900. This means 900 parts out of 1000 of the items
are silver. What is the percentage of silver in it? (Calculate)
_______________________________________________________
______________________________________________________ .
14.True or False:
a. Protons have a negative electric charge.
b. Neutrons have a positive electric charge.
c. Electrons have a neutral electric charge.
15. The diagram given shows Rutherford’s gold foil experiment.
Draw the paths of alpha particles as they pass through the gold foil. Show
how some particles are deflected and some are deflected at large angles or
even bounce back.
16.What does a scientist mean by a "pure element" ?
___________________________________________________________
17.The diagram showing an atom.
Complete: From the diagram given. B refers to ______________ .
18.
a. The law of reflection is.
________________________________________________________
________________________________________________________
b. The diagram shows a plane mirror and a normal line.
Draw a ray of light being reflected at the point where the normal
meets the mirror.
19.Light enters water from air. What happens to the light ray
___________________ .
20.
a. The speed of light becomes faster or slower when it passes from air into
glass?
___________________________________________________________
b. Why light travels at its fastest speed in a vacuum?
___________________________________________________________
21. Why do plants need nitrate and magnesium for ____________________ .
22. Complete:
a. Transpiration is _____________________________________________.
b. Xylem system is ____________________________________________ .
23. Explain how the process of transpiration helps to cool a plant on a hot day.
____________________________________________________________
____________________________________________________________.
24. What happens when two sound waves reinforce each other? (Shade
correct answer)
The sound disappears.
The sound becomes louder.
25. The diagram shows two sound waves on an oscilloscope screen.
Which is wave A or wave B has a larger amplitude?
___________________________________________________________
26. What are tectonic plates _______________________ .
27. Assuming that Africa moves at a constant
speed of 4 cm per year, calculate the time taken for this
continent to move by 1 km.
______________ years