Superb Jhs Science mock examination questions and answers
Superb Jhs Science mock examination questions and answers is a special mock to prepare candidates adequately against their Bece.
Section A. Answer all questions
1.a. the diagram below is a cross section through a type of teeth in humans. Study the diagram below carefully and answer the questions that follow
I. Identify the type of teeth shown in the diagram above
Ii. Name the parts labeled I, II, III and IV
III. State one function of each of the parts labeled I, II, III and IV
IV. State four basic Uses of the human teeth
b. The setup was used to demonstrate some changes in states of matter. Study the setup carefully and answer the questions that follow
I. Explain the three changes of state that occur in the setup above
Ii. What will you see on M and why?
III. State three factors which affect the process at stage B.
IV. Mention two benefits of the process occuring at stage B.
c. In diagrams A and B below, two holes were made in each of the two cylindrical tins after which they were filled with water. Study the diagrams carefully and answer the questions that follow
Superb Jhs Science mock examination questions and answers
I. Name the phenomenon being
demonstrated by the Set-ups above
Ii. What observation is made in setup A and set up B, respectively?
III. What conclusion can be drawn from the observations in And B?
IV. State two factors that affect the phenomenon being demonstrated
V. Give one useful application of the phenomenon being demonstrated
d. In an experimental setup below, two garden beds labeled A and B were prepared with the same soil with organic manures added to One of the beds. Study the diagrams carefully and answer the questions that follow
I. Which of the two beds were prepared with organic manure?
Ii. Explain your answer to d.i. above
III. Identify two features that would be observed in the growth on A.
IV. Identify two features that would be observed in the growth on B.
V. State two conclusion on the observation of the two seedlings.
Superb Jhs Science mock examination questions and answers
Solution to question number one a, Superb Jhs Science mock examination
a. I. Identification of teeth
Molar or premolar
Ii. Identification of parts of teeth
I- pulp cavity
II- blood vessels
III- dentine
IV- enamel
III. Functions of parts
Pulp cavity– supplies the teeth with blood and make the teeth sensitive to hot and cold temperature.
Blood vessels– supplies the teeth with nutrients and oxygen
Dentine- provides support to the enamel
Enamel- hard substance that protects the teeth against decay or damage.
IV. Uses of the human teeth
– grinding food
– bitting food
– cutting food
– chewing food
– tearing food
Solution to question number one b.
b. I. Explanation of the three changes of state
A- melting- it is the change of state of matter from solid to liquid
B- evaporation- it is the change of state of matter from liquid to gas
C- condensation– it is the change of state of matter from gas to liquid
Ii. What will be seen on M with explanation
Drops of water is collected on M, this is because water vapour escaping from vessel is trapped and condenses.
III. Factors that affect the process at state B.
– atmospheric pressure
– surface area
– temperature
– density of liquid.
– speed of wind
– humidity
IV. Benefits of the process at stage B.
– evaporation of sea water gives us salt for several Uses
– water evaporates from washed clothing to make them dry.
– human body produces sweats when the internal temperature is high in order to regulate the internal body temperature.
– evaporation dries our sweat to keep our bodies cool
– During distillation, alcohol evaporates to be separated from water.
Superb Jhs Science mock examination questions and answers
Solution to question number one c.
c. I. Phenomenon being demonstrated
Pressure in fluids
Ii. Observation made in setup A and B
In setup A, water comes out of the holes at the same speed and springs at the same depth but in setup B, water comes out of the holes at different speeds or springs at different distances.
III. Conclusion drawn in setup A and B
Setup A – pressure in fluids act equally at all directions at the same depth
Setup B- pressure in fluids increase with depth.
IV. Factors that affect pressure in fluids
– Density of liquids
– the depth of the fluid.
– the surface area of the fluid
V. Useful application of the phenomenon
– car jack
– hydraulic jack or press.
– enema
– hydraulic brakes
Solution to question number one d.
d. I. Bed prepared with organic manure
Bed A.
Ii. The plant on that bed looks healthier
III. Observed growth features in A.
– the plant grows faster
– leaves look dark and green.
– stem looks strong
– the plant will yield well
IV. Observed growth features in B.
– stunted growth
– leaves look pale yellow
– stem looks weak.
– Poor fruits and seeds formation
V. Conclusion
Organic manure increases the fertility of soil.
Superb Jhs Science mock examination questions and answers
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