BEACON EXAMS LINKS-0547316472/0546215469
Answer *four* questions *only* from this section
All questions carry equal marks
WASSCE/BECE/NOVDEC 2018...loading💢💢
Answer *four* questions *only* from this section
All questions carry equal marks
WASSCE/BECE/NOVDEC 2018...loading💢💢
1. (a) What is _colostrum_? *(2marks)*
ii. Explain the importance of feeding a newly born mammal with colostrum *(2marks)*
(b). State:
i. _Four_ physical properties of water. *(4marks)*
i. _Four_ physical properties of water. *(4marks)*
ii. The reason why water is referred to as a _universal solvent_ *(1mark)*
(c) i. What is meant by _sexual maturity_ in humans? *(2marks)*
ii. Give _two_ secondary sexual characteristics _each_ which are unique in
( _a_). Girls
( _b_) . Boys *(4marks)*
( _a_). Girls
( _b_) . Boys *(4marks)*
(d). A vehicle is moving along at 5m/s .
i. What should be the constant deceleration in order to stop it within 15m? *(3marks)*
i. What should be the constant deceleration in order to stop it within 15m? *(3marks)*
ii. How long it take to stop? *(2marks)*
2. (a) i. What is _magnetic field_? *(2 marks)*
ii. Two bar magnets of similar strength and size are placed in a straight line with opposite poles facing each other. Draw and label a diagram to show a magnetic flux pattern around them. *(3marks)*
(b). State _two_ general characteristics of _each_of the following kingdoms used for classifying organisms
i. Fungi
ii. Prokaryotae
iii. Protoctista *(6marks)*
i. Fungi
ii. Prokaryotae
iii. Protoctista *(6marks)*
(c) i. What are _Organic fertilizers?_ *(1mark)*
ii. State _three_ advantages of organic fertilizers over inorganic fertilizers *(3marks)*
(d) i. What are _X—rays?_ *(2marks)*
ii. State _three_ dangers associated with over exposure to X —rays. *(3marks)*
3.(a) i. What is meant by the following terms?
( _*a*_ ) Atomic number?
( _*B*_ ) Mass number? *(2marks)*
( _*a*_ ) Atomic number?
( _*B*_ ) Mass number? *(2marks)*
ii. Tabulate _three_ differences between covalent compounds and ionic compounds. *(3marks)*
(b) i. Differentiate between _thinning_ and _pricking out_ as used in crop production. *(2marks)*
ii. State _two_ benefits of pricking out *(2marks)*
(c) i. What is fruit or seed _dispersal_? *(1mark)*
ii. State _two_ characteristics _each_ of fruits or seeds dispersed by
( _*a*_) wind
( *_B_*) water
( *_c_*) Anima *(6marks)*
( _*a*_) wind
( *_B_*) water
( *_c_*) Anima *(6marks)*
(d) i. What is _thermal expansion_? *(1mark)*
ii. State _two_ effects of thermal expansion *(2marks)*
ii. State _two_ effects of thermal expansion *(2marks)*
4.(a) What is a _petrochemical_? *(2marks)*
(b). State *_one_* use of the following fractions of petroleum
i. Bitumen
ii. Diesel
iii. Petroleum gas *(3marks)*
i. Bitumen
ii. Diesel
iii. Petroleum gas *(3marks)*
(b). i. State the _Ohm's law_ *(2marks)*
ii. Two resistors of resistance 10 ohms and 20ohms are connected in parallel to a battery of e.m.f 12V. Calculate the current flowing through the 20 ohms resistor. *(3marks)*
ii. Two resistors of resistance 10 ohms and 20ohms are connected in parallel to a battery of e.m.f 12V. Calculate the current flowing through the 20 ohms resistor. *(3marks)*
(c) i. State _two_ organisms involved in the nitrogen cycle *(2marks)*
ii. State *_three_* ways in which the nitrogen cycle is important to living organism *(3marks)*
(d) i. What is _malnutrition_? *(2marks)*
ii. State three effects of malnutrition *(3marks)*
ii. State three effects of malnutrition *(3marks)*
5(a) i. What is meant by molar mass?
ii. An aqueous solution of sodium hydroxide contained in a bottle is labeled 0.2M. Determine the mass of sodium hydroxide used in preparing.
[Na = 23, O = 16, H = 1] *(3marks)*
[Na = 23, O = 16, H = 1] *(3marks)*
(b) i. State _two_ characteristics of an image formed by a convex mirror when an object is placed in front of it. *(2marks)*
ii. Explain why convex mirrors are preferred to plain mirrors as driving mirror. *(2marks)*
(c) i. Explain the term _tissue_ as applied to living organisms *(2marks)*
ii. List _two_ types of tissues found in green plants *(2marks)*
iii. State _one_ function _each_ of the tissue listed in _(ii)_ above. *(2marks)*
(d) i. State _three_ differences between _igneous rocks_ and _sedimentary rocks_ *(3marks)*
ii. Describe briefly how metamorphic rocks are formed. *(2marks)*
6(a) i. Distinguish between _respiration_ and _breathing_ *(3 marks)*
ii. Name _two_ disorders associated with respiratory of humans *(2marks)*
ii. Give _two_ differences between sound waves and electromagnetic waves *(2marks)*
ii. A wave of wavelength 10m moves at a velocity of 250m/s. Calculate the frequency of the wave. *(3marks)*
(c). i. What is _integrated pest management_? *(2marks)*
State any _two_ advantages of integrated pest management. *(2marks)*
iii. State _two_ economic effects of insects *(2marks)*
(d) i. What is an _isomerism_? *(2marks)*
ii. Write the structures of the following
( *_a_*). 2- methyl-3-ethylpentane.
( *_a_*). 2- methyl-3-ethylpentane.
*_END OF PAPER_*