midyear exam

Answer all the questions. (40 marks)

1 Which of the following is not a natural phenomenon?

A Earthquake
B Thunderstorm
C Surgical operation
D Eclipse of the moon

2 Which of the following is a field of study in science?

A Zoology
B Artist
C Accounting
D Typist

3 Which of the following is a career in science?

A A doctor
B A lawyer
C A make up artist
D A fashion designer

4 Which of the following pairs is not matched correctly?

A Chemistry – study of chemical process
B Astronomy – study of planets
C Geology – study of climates
D Physics – study of matter

5 Which of the following sequences shows the correct scientific process skills?

A Observe → analyse→ record observation→ interpret data
B Observe→ record observation → analyse →interpret data
C Analyse →interpret data → observe → record observation
D Interpret data → analyse → observe → record observation

6. Arrange the following prefixes in order, starting with the prefix of the highest value.
W – Mega
X – Deci
Y – Giga
Z – Centi

A. Y,W,X,Z
B. W,Y,Z,X
C. X,Z,W,Y
D. Z,W,Y,X

7. Which of the following comparisons is correct regarding mass and weight?
Mass Weight
A Influenced by gravitational force Not influenced by gravitational force
B SI unit is the Newton SI unit is the kilogram
C Measured by a beam balance Measured by a spring balance
D Its value varies from place to place Its value is constant

8. The suitable tools to measure mass include.
I Spring balance
II Triple balance
III Lever balance

A. I and II
B. I and III
C. II and III
D. I,II and III

9. Which of the following has no mass?
A. Oxygen
B. Water
C. Atmosphere
D. Vacuum

10. 10 marbles are dropped into a measuring cylinder containing 50 cm3 of water. The water rises to 80 cm3. The average volume of one marble is…
A. 0.1 cm3
B. 0.3 cm3
C. 3.0 cm3
D. 10 cm3

11. Which structure of the plant cell contains a green pigment that traps sunlight for photosynthesis?
A. Cell membrane
B. Cell wall
C. Cytoplasm
D. Chloroplast

13. The following are steps to be taken when using a light microscope
J- Turn the fine focus knob
K- turn the coarse focus knob
L- place the slide on the stage
M- adjust the mirror and the diaphragm
Which of the following sequences is correct?
A. J→L→M→K
B. K→J→L→M
C. L→J→K→M
D. M→L→K→J

14. The information below refers to the…
• A complex jelly-like substance
• 70% - 90% of its composition is water
• The place for chemical reaction

A. Cytoplasm
B. Nucleus
C. Cell wall
D. Vacuole

15. Which of the following is not a microorganism?

A. Chlamydomonas
B. Spirogyra
C. Bacteria
D. Earthworm

16. A unicellular organism is…

A. An organism which consist of many cells
B. An organism which consist of only one cell
C. An organism which is made up of the same kind of cells
D. An organism which cannot be seen with the naked eye

17. The following shows the stages in cell organization
Cell → P → Q → R → Organism


P, Q and R represent…


P Q R
A Tissue Organ System
B Organ Tissue System
C Tissue System Organ
D System Organ Tissue

18. Based on cell organization, the skin, bones and nose can be grouped as…

A. Systems
B. Organs
C. Tissues
D. Cells

19. Which of the following statements is not true about cell organization?

A. The cell is the basic unit of living organism
B. An organ consists of different types of tissues
C. Groups of different tissues that perform a specific function form a system
D. A group of similar cells which perform a specific function is called a tissue

20. Which type of tissue in the human body is responsible for detecting stimuli and coordinating the body movements?

A. Connective tissue
B. Muscle tissue
C. Epithelial tissue
D. Nerve tissue

21. The organs listed below make up a system in the human body
• Nose
• Trachea
• Lungs

The system is…

A. The excretory system
B. The nervous
C. The respiratory system
D. The blood circulatory

22. The following information describes a type of cell in the human body
• Cover the body and lines surfaces of organ
• Protect the cells below them

The cells are most probably…

A. Muscle
B. Epithelial cells
C. White blood cells
D. Nerve cells

23. The following are the parts of a system in the human body
• Skull
• Backbone
• Pelvic girdle
• Pectoral girdle

What is the system?
A. The skeletal system
B. The nervous system
C. The muscular system
D. The excretory system

24. Human beings are complex organisms because…

I human beings have various types of cells
II the cells of human beings are organized to form tissues, organs and systems
III human beings are able to reproduce faster than other organisms

A. I and II only
B. I and III only
C. II and III only
D. I, II and III

25. Which of the following statements is not true about matter?

A. Matter has mass
B. Matter occupies space
C. A book is an example of matter
D. Matter have a fixed volume

26. Which of the following describes the particles of copper at room temperature?

A. Always move randomly
B. Compact and arranged in a regular pattern
C. Have a very high energy content
D. Are far apart from one another

27. Particles diffuse faster through a liquid than through a solid. This is because…

A. Liquid particles have more energy
B. Liquid particles have no force that binding them
C. Liquid particles can be compressed
D. Liquid particles have more space between them


28. Gases are much easier to compress compared to liquids because…

A. The spaces between the gas particles are very big
B. The movement of the gas particles is much slower
C. The particles of gases are arranged in an orderly way
D. The size of gas particles decreases easily

29. When water is heated, what will happen to its particles?

A. The particles of water become smaller
B. The movement of the particles of water becomes slower
C. The particles of water vibrate at their own positions
D. The particles of water move further apart from one another

30. A stone has a mass of 10 g. it is put into a cylinder which contains 80 cm3 of water. Then the water level increases to 100 cm3. What is the density of the stone?

A. 0.5 g cm-3
B. 0.2 g cm-3
C. 0.1 g cm-3
D. 5 g cm -3

31. An ice cube floats on the surface of water. This shows that…

A. Ice is heavier than water
B. Ice is denser than water
C. Water is lighter than ice
D. Water is denser than ice

32. What is the mass of a marble if its density is 10 g cm-3 and its volume is 5 cm-3?

A. 0.5 g
B. 2 g
C. 5 g
D. 50 g

33. The density of an object can be determines by finding its…

A. Mass and weight
B. Length and volume
C. Mass and volume
D. Area and weight

34. Which of the following statements are true about density?

I all solids have the same density
II equal volumes of different liquids have different densities
III a solid that is denser than water will sink in water

A. I and II only
B. I and III only
C. II and III only
D. I,II and III

35. Why is it easier to float in sea water than in fresh water?

A. Sea water is present in a larger quantity
B. Sea water is denser than fresh water
C. Sea water is always warmer than fresh water
D. Sea water contains more microorganisms

36. Three types of liquids, X, Y, and Z are placed in a measuring cylinder. Liquid Y is below liquid X, and liquid Z is seen to be at the bottom. The arrangement of the liquid in order of increasing density is…

A. X,Y,Z
B. Z,Y,X
C. X,Z,Y
D. Z,Y,X

37. Solid X is denser than solid Y. Solid Y is denser than liquid P. liquid P is less dense than solid Z. Which of the following solids will sink in liquid P?

A. X and Y
B. X and Z
C. Y and Z
D. X, Y and Z


38. The table below shows the densities of four substances. All of the substances are placed in a measuring cylinder containing water. The density of water is 1.0 g cm-3.
Solid substance Density(g cm-3)
J 8.90
K ?
L 10.50
M 2.60

If only substance K floats on water, what is the possible density of substance K?

A. 7.9 g cm-3
B. 11.4 g cm-3
C. 2.5 g cm-3
D. 0.5 g cm-3

39. The density of a substance can be defined as…

A. The volume of space occupied by 1 g of the substance
B. The weight per unit volume of the substance
C. The energy per unit volume of the substance
D. The mass per unit volume of the substance

40. Logs do not sink when they are transported by rivers to factories.
Which statement explains this?

A. Logs are less dense than water
B. Logs are denser than water
C. Logs have big surface area
D. Water contains salt that enables logs to float