Integrated Science 2019

Objective Questions

Which of the following characteristics is associated with insect-pollinated flowers?

A) They do not secrete nectar B) The surface of the stigmas are sticky C) Their flowers are inconspicuous D) Their stamens have long filaments

Correct Answer: B) The surface of the stigmas are sticky

The following materials are conductors of electricity except

A) blood B) copper C) mica D) water

Correct Answer: C) mica

Acids react with many reactive metals to give off

A) hydrogen gas B) oxygen gas C) ammonia gas D) carbon dioxide gas

Correct Answer: A) hydrogen gas

The commonest method for propagating crops in Ghana is by

A) budding B) root cuttings C) seeds D) stem cutting

Correct Answer: C) seeds

Which device is used to measure the population density of a plant species?

A) Pooter B) Quadrat C) Sweep net D) Wire mesh

Correct Answer: B) Quadrat

The part of the eyes on which images are formed is called

A) aqueous humour. B) pupil. C) lense. D) retina.

Correct Answer: D) retina.

The arrangement of electrons in shells of an atom is called

A) atomic structure B) periodic arrangement. C) electron configuration D) electronic structure

Correct Answer: C) electron configuration

The type of soil erosion caused by water from exposed land on a gentle slope is referred to as

A) gulley erosion. B) rill erosion. C) sheet erosion. D) splash erosion.

Correct Answer: A) gulley erosion.

An advantage in the use of hard water is

A) furing of kettle. B) blockage of water pipes. C) formation of scum. D) formation of strong bones.

Correct Answer: D) formation of strong bones.

In beta decay, the particle emitted is

A) electron. B) neutron. C) helium nucleus. D) hydrogen atom.

Correct Answer: A) electron.

Introduction of a trivalent element into a tetravalent element
I. is known as doping.
II. forms an n-type semi-conductor.
III. forms a p-type semi-conductor.
Which of the statements above are correct?

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

Correct Answer: C) II and III only.

Which of the following animals is warm-blooded?

A) Agama lizard B) Wall gecko C) Cockroach D) Mouse

Correct Answer: D) Mouse

In testing for starch in a green leaf, the leaf is boiled in ethanol so as to

A) kill the leaf cells B) dissolve the chlorophyll. C) enable iodine solution to penetrate the tissues. D) stop all chemical reactions in the cells.

Correct Answer: B) dissolve the chlorophyll.

The following statements are examples of application of biotechnology in agriculture except

A) crossing animals with desired characteristics. B) improving upon colour and size of a flower . C) introduction of foreign genes into livestock. D) development of pest-resistant crops.

Correct Answer: B) improving upon colour and size of a flower .

Which of the following solvents could best be used to remove ink stain in a dress?

A) Ethanol B) Kerosene C) Milk D) Petrol

Correct Answer: A) Ethanol

A difference between an atom and an ion is that an atom

A) is electrically charged whilst an ion is neutral. B) has protons whilst an ion has no protons C) can move about in solution whilst Ions cannot move in solution. D) cannot conduct electricity whilst an ion conducts electricity.

Correct Answer: D) cannot conduct electricity whilst an ion conducts electricity.

The application of lime to soil is to

A) improve the toxicity of dissolved B) improve the soil structure. C) increase the availability of calcium ions. D) decrease the activities of soil living organisms.

Correct Answer: C) increase the availability of calcium ions.

Which of the following food chains is correct?

A) Grass –> frog –> grasshopper –> hawk B) Hawk –> grass –> grasshopper –> frog C) Grass –> grasshopper –> frog –> hawk D) Grasshopper –> grass –> frog –> hawk

Correct Answer: C) Grass –> grasshopper –> frog –> hawk

Which of the following traits in humans is an example of continuous variation?

A) Gender B) Colour blindness C) Body mass D) Blood group

Correct Answer: C) Body mass

Which of the following metals will release hydrogen from dilute acids?

A) Ag B) Cu C) Hg D) Zn

Correct Answer: C) Hg

Which of the following indicators could be used to determine a pH of 7.4 of a solution?

A) Litmus solution B) Methyl orange C) Phenolphthalein D) Universal indicator

Correct Answer: D) Universal indicator

A property of a material that makes it a good conductor of heat is its

A) colour. B) length. C) nature. D) volume.

Correct Answer: C) nature.

The relative density of a substance has no units because it is

A) the ratio of mass to volume. B) a ratio of densities. C) always compared to the density of D) a ratio of mass to density.

Correct Answer: B) a ratio of densities.

In fruit flies, the allele for grey body colour is dominant and black body colour is recessive. Two grey bodies flies mated and they produced 75 grey-bodies flies and 25 black-bodies flies. The cross described is most likely to be

A) GG x GG B) GG x gg C) Gg x GG D) Gg x Gg

Correct Answer: D) Gg x Gg

Which of the following features are associated with dairy cattle? They
I. are lean with fairly long legs.
II. have wedged-shaped body conformation.
III. have well-developed udder.
IV. are generally humped.

A) I and II only B) II and III only C) I, II and III only D) II, III and IV only

Correct Answer: C) I, II and III only

A girl of mass 60 kg runs a 100 m race in 10 s. Use the information to answer questions 26 and 27. What is the speed of the girl?

A) 110 ms-1 B) 100 ms-1 C) 50 ms-1 D) 10 ms-1

Correct Answer: D) 10 ms-1

Calculate the kinetic energy of the girl.

A) 6000 J B) 3000 J C) 170J D) 40 J

Correct Answer: B) 3000 J

The atomic number of an atom is 15 and its mass number is 32. Determine the number of neutrons in the atom.

A) 15 B) 32 C) 17 D) 47

Correct Answer: B) 32

The IUPAC name for Na2S04 is

A) sodium(II) sulphate. B) disodium sulphate. C) sodium tetraoxosulphate(IV) D) sodium tetraoxosulphate(VI)

Correct Answer: D) sodium tetraoxosulphate(VI)

Release of dust into the atmosphere
I. cuts down photosynthesis.
II. causes respiratory diseases.
Ill. reduces visibility
Which of the statements above is/are correct?

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

Correct Answer: D) I, II and III

Dehorning is important in animal production because it

A) control endoparasites. B) makes it easy to handle animals. C) reduces the food intake of the animal. D) makes easy identification of animal.

Correct Answer: B) makes it easy to handle animals.

Which of the following physical properties are associated with sandy soil?
I. It is well aerated.
II. It has a poor water holding capacity.
III. It is poorly drained.
Which of the statements above is/or are correct?

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

Correct Answer: B) I and II only

What is the unit for momentum’?

A) kg m3 B) kg m s-1 C) kg m s-2 D) m s-1

Correct Answer: B) kg m s-1

Which of the following statements about breathing in humans is correct?

A) The same amount of nitrogen, more carbon dioxide and less oxygen is breathed out than breathed in. B) The same amount of nitrogen, less carbon dioxide and more oxygen is breathed out than breathed in. C) More nitrogen, more carbon dioxide and less oxygen is breathed out than breathed in. D) Same amount of nitrogen, more dioxide and more oxygen is breathed in than is breathed out.

Correct Answer: A) The same amount of nitrogen, more carbon dioxide and less oxygen is breathed out than breathed in.

An advantage of the use of hay over silage is that hay

A) ensure the availability of feed all year round. B) has laxative effect. C) has higher proportion of leaves, water and nutrients. D) is more palatable to livestock.

Correct Answer: A) ensure the availability of feed all year round.

The nuclide 226 88Ra undergoes alpha decay, the mass number and the atomic number of the daughter nuclide are respectively

A) 226, 89. B) 226, 88. C) 230, 90. D) 222, 86.

Correct Answer: D) 222, 86.

The concept of natural selection involves the following features except

A) survival of the fittest. B) competition among organisms. C) organisms with the best adapted features. D) the use of the concept to classify organisms.

Correct Answer: D) the use of the concept to classify organisms.

Refraction of light occurs because light travels from one medium to another

A) in the same direction. B) with the same intensity. C) with different velocities. D) obeying the laws of reflection.

Correct Answer: C) with different velocities.

Drug addiction is a brain disease because it

A) is chronic and relapsing, B) is harmful and result in compulsive brain of the user. C) [Option Missing in Source] D) makes the brain more sensitive to

Correct Answer: B) is harmful and result in compulsive brain of the user.

A common disease that affect sheep is

A) anthrax. B) aspergillosis. C) coccidiosis. D) gumboro.

Correct Answer: A) anthrax

Which of the following gases are major atmospheric pollutants?
I. Nitrogen dioxide
II. Oxygen
III. Chlorofluorocarbon

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

Correct Answer: B) I and III only.

Ethanol may be preferred to mercury as a thermometric liquid because

A) ethanol is colourless. B) mercury has a higher specific heat capacity C) mercury wets glass. D) ethanol has a far lower freezing point.

Correct Answer: D) ethanol has a far lower freezing point.

Which of the following uses of substances is or are correct for esters? They are used as
I. solvents for quick-drying paints.
II. flavours in food preparations and cosmetics.
III. drying agent in making textiles.

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

Correct Answer: C) I and II only.

In which of the following blood vessels is the pressure highest?

A) Hepatic artery B) Renal artery C) Dorsal aorta D) Vena cava

Correct Answer: C) Dorsal aorta

Yam is classified as a

A) cereal. B) legume. C) root tuber. D) stem tuber.

Correct Answer: C) root tuber

The Easterlies are winds which blow

A) towards the poles. B) from the poles to the equator. C) along the equator. D) into the sea.

Correct Answer: B) from the poles to the equator

An example of a saturated hydrocarbon is

A) ethane. B) ethene. C) ethyne. D) ethanol.

Correct Answer: A) ethane.

The structure in the human body which stores glycogen is

A) ileum. B) liver. C) lungs. D) pancreas.

Correct Answer: B) liver

The image formed by a plane mirror is

A) magnified. B) real. C) laterally inverted. D) diminished.

Correct Answer: C) laterally inverted

One disadvantage of mulching is that it

A) may be a source of new weed species. B) acidifies the soil. C) improves soil texture. D) increases soil temperature.

Correct Answer: A) may be a source of new weed species.

Theory Questions

a)
i)Define each of the following terms:
I) compound;
II) mixture
ii) State two differences between an element and a compound. a compound.
.. b) Explain each of the following terms:
i) greenhouse effect;
ii) climate change.
c)
i) What is electrical rectification?
ii) Using simple wave diagrams, explain half-wave rectification.
d) State one way in which each of following environmental factors important to the life cycle of crops:
i) rainfall;
ii) temperature;
iii) sunshine, iii)
iv) wind.

a) i) Give three reasons why goats are not normally kept under the intensive system of management.
ii) Name two diseases that affect rabbits.
b) i) Draw the structure of 11Na+
ii) State two differences between organic compounds and inorganic compounds.
c) i) What are decomposers?
ii) Name three common decomposers in an ecosystem.
d) i) Name three structures in the middle ear that help in the transmission of sound waves;
ii) Mention two ways in which earmuffs are important.

a) An electrical appliance rated 1.5 kW, 240 V is left running for 2 hours. Calculate the
i) current drawn;
ii) electrical energy consumed.
b) i) In what two ways does mulching help to conserve the soil?
ii) Give two examples of mulching
c) i) What is pollution?
ii) List three major atmospheric pollutants
d) i) State two benefits of each of the following minerals to the human body.
?) potassium;
?) calcium.
ii) Name one source of each of the minerals listed in d) (i).

a) i) State the method of preparing a salt from each of the following pairs of substances:
?) dilute tetraoxosulphate(VI) acid and dilute sodium hydroxide;
?) lead(ll) trioxonitrate(V) and sodium chloride
ii) Write a balanced equation for the reaction between lead(ll) trioxonitrate (V) and sodium chloride.
b) i) What are tidal waves?
ii) State four ways in which water could be contaminated.
c) i) State two ways in which legumes are important in crop production.
ii) State three advantages of crop rotation.
d) i) State three qualities of a good thermometric liquid;
ii) Give two precautions that must be taken when using a liquid-in-gas thermometer.

a) State:
i) two functions of the placenta in mammals;
ii) two structural features of the placenta which adapt the placenta to its functions.
c) List five farming practices that check soil erosion.
d) i) Arrange the following stages of water treatment for public consumption in the correct order:
chlorination, sedimentation, screening, sand filtration and aeration.
ii) State the significance of each of the following stages in water treatment:
I) screening;
II) filtration;
II) chlorination

a) State five post planting practices on cereal farm to ensure a high yield
b) i) Define mechanical advantage of a simple machine. simple machine.
ii) Give two examples of second class levers.
c) i) Name four apparatus needed in the preparation of a standard solution. the preparation of a standard solution.
ii) Calculate the volume of water needed to dilute 20 cm3 of 5.0 M dilute 20 cm3 of 5.0 M HCI to 1.0 M HCI solution.