BASIC SCIENCE FIRST TERM EXAMINATION JSS 3

FIRST TERM EXAMINATION JSS 3 

 TERM

SUBJECT: BASIC SCIENCE          TIME: 1HR 30MINS   CLASS: JSS 3

ANSWER ONLY THREE QUESTIONS IN THEORY

1. Which of the following is a hard drug? A. cocaine  B. penicillin C.aspirin D.tetracycline
2. Modes of drug abuse include the following except.  A sniffing  B. self-injecting . C oral.  D. doctor’s prescription.

3.The following substances are natural drugs except A. kolanut B. tobacco  C.Indian hemp  D.paracetamol.

4.Which of the following agencies monitors the movement of hard drugs in and out of the country?  A. Nigeria immigration service  B. federal road safety corps  C. NDLEA   D.Nigeria Airways.

 5.A trait that appears in successive generation is  called   A. recessive  Dominant trait  Physical trait  D. genotype

6.Family traits are important to all of the following except in   A. intelligence. B.  Disease control  C.resenblance  D.hunger control.

7.Variation like height and skin colour among members of the same family that change from one end of the scale to the other are  A.  recessive  B. Continuous  C. discontinuous. D.  Genotype

8. The genetic make-up of an individual can be altered by  A. the environment B. enzymes  C. exercise  D.  food
9. Which of these is a genetic disease?  A. sickle cell anemia  Malaria  C. headache D, Kwashiorkor

10.All these are the causes of  erosion except A.  Overgrazing B. cutting down of trees C. Making ridges along the slope. D. Avoid the use of cover crop.

11.All these are methods of preventing erosion except  A.fertilizer application  Vegetation C. fabric  log  D. tilling

12.The top layer of soil could be washed away  as a result of A. volcanic action B. tree felling  C. grass planting.  D.sand deposit.

13.Trees which help to reduce wind erosion are called  A. wind vane Wind erosion C. wind support D. wind breaks.

14.Which of the following is an agent of erosion?  A.tree  B. Grasses   Sun  D. wind

15.Soil erosion  can be prevented by  A.felling tree   B.Preventing bush burning  C. Irrigation   D.Crop rotation 

16. Cutting down of trees and clearing of forests indiscriminately is called  A. afforestation  B. deforestation  C. regulation  D. conservation

17.Forests provide life for………… wildlife   A. shelter  B.poison  C. money  D. roads

18……………….. is one of the dangers of deforestation   A.good soil   B.good road  C.increase in population  C. Extinction of wildlife

19.A set of rules by the government to control excessive destruction of  forestry is known as   A. forest reserve   B.forest regulation  C.forest destruction  D. forest activities

20. All of these are regulation of on forestry except   A.practising bush burnig  B.prohibition of poaching in reserve areas  C.enactment of laws against cutting of trees  D.establisment of forest game reserve

21.Which of the following activities does not cause desertification?  A. indiscriminate cutting of trees  B.bush burning  C.road construction  D.swimming

22.Which of these statement about desertification is correct?

1. desertification is the burning of bush  B.  desertification is the enrichment of desert into habitable land  C.desertification is the planting of new seedlings  D. desertification is the cutting down of trees. 

23.Which of these activities is associated with livestock or animals?  A. erosion  B.bush burning  C.mining  D. overgrazing

24.Where is the ozone layer located in the atmosphere?  A. earth surface  B.stratosphere  C.mesophere  D. lithosphere

25.Which of the following is not a consequence of the depletion of ozone layer?  A. global warming  B.greenhouse effect  C.ice melting and flooding  D.formation of cloud

26.Which of the following is greenhouse gas?  A Chlorine  B. Water vapour  C.  Oxygen  D. Sulphur

27.Which of the following is not an importance of ozone layer?  A  It purifies the atmosphere of CO2   B.It releases heat to the earth surface  C.It absorbs high energy radiation from the sun  D.It absorbs water vapour from the earth crust.

28.Which of the following is not a control measure against the depletion of the ozone layer?  A. controlling the use of chlorofluoro-carbons B.constant bush burning  C.regular servicing of automobiles  D.reducing the rate of bush burning

29.The stratosphere is located about………. Above the earth surface   A.32km-40km   B.19km-48km   C.16km-18km  D.6km-12km

30.Which of these statements is correct about the effect of bush burning on farmlands?

A.Water content of the soil increases  B. Kills the bacteria that cause decay on farmlands.

1. Increases soil fertility of farmlands  D.Causes rapid growth of farmland crops.

31.Drugs can be used for …………………….. and …………………..purposes  A.medical, recreational  B.utility, recreational   C.medical, utility D.defence, acceptability

32.All these are strategies for healthty drug-free life except  A.education  B.stayed engaged  C.seek councel D.involve in drug business.

33.Parents  traits are transferred to the offsprings during  A.fertilization  B.intercourse   C.gestation   D.ovulation

34.NAFDAC was established in the year  A.January1, 1994   B.Febuary 1, 1994   C.April 1, 1994  D.May  1,1994

35.Which of these is not a  way discouraging bush burning?  A.awareness  B>enlightment  C.government support  D.encourage bus burnig

36.One of these human practices cannot lead to desertification  A.afforestation  B.industrialisation  C.farming  D.overgrazing

37.The chemical symbol of ozone is   A.O  B  O2   C.O3  D.O4

38.Ozone layer depletion may be controlled by   A.tree planting  B.overgrazing  C.bush burning   D.oil spill clearing

39.Increase in the earth temperature due to human activities is known as  A. ozone depletion  B.global warming   C.climate change   D.green house effect.

40.To absorbs excess carbon(iv) oxide from the atmosphere …………………… are planted  A.flowers  B.vegetatables  C.trees  D.weeds.

THEORY PARTS ( answer three questions only).

1a.State two misuse of herbal medicine(2mk)

1. Describe two adverse effects of drug(2mk)
2. State two functions of (i) NAFDAC  (ii) NDLEA(4mk)
3. Write the full meaning of the above agencies.. (2mk)

2a. Define family trait(1mk)

b.state two significance of family traits to intending couples(2mk)

1. State two differences between dominant and recessive genes(2mk)

state five examples of traits that can be transferred from parents to offspring.(5mk)

3a.State four activities of man which cause erosion(2mk)

b.List four methods through which soil erosion can be controlled.(2mk)

c.List four causes of flooding in your community.(4mk)

d.State four methods of controlling floods.(2mk)

4a.Define deforestation (1mk)

b.State three reasons why people cut down trees(3mk)

c.Name six geographical belts in Nigeria(6mk)

5a.State the location of the ozone layer in the atmosphere(1mk)

b.State three importance of the ozone layer(3mk)

c.Write three effects or hazards caused the depletion of ozone layer on the environment(3mk)

1. Explain briefly  (1)  global warming  (11) greenhouse effect (2mk)