TOPICAL EXERCISESYEAR 4

CHAPTER 1: INVESTIGATING LIVING THINGS

1. BASIC NEEDS

1.1 Human Have Basic Needs

1. The picture shows how humans lived in a cave a long time ago. The cave is by a riverside and a cave lady is cooking for her family.

(a) Based on the picture, name the basic needs of humans.(i) ____________________(ii) ____________________(iii) ____________________

(b) Why does the family need to eat?(i) ___________________________________(ii) ___________________________________

(c) Why does the family need to stay in the cave?________________________________________

(d) Name one other basic need of human.________________________________________

(e) State the importance of basic need in (d) to humans.________________________________________

1.2 Animal Have Basic Needs

1. Fill in the blanks with the correct words.

(a) The rabbit in the picture will die eventually if its condition were to be prolonged because it gets no _________ and __________.

(b) The mouse in the picture will die soon because it will run out of _______ to _________.

(c) Animal need shelter to protect themselves form __________, _________ and _________.

(d) Name three animal shelters.(i) __________________(ii) __________________(iii) __________________

2. Two similar fish are each placed in two similar sized aquariums. The conditions of both the aquariums are similar except that the aquarium P is sprayed with a layer of oil as shown in the picture.

The fish in aquarium P was found to be dead after several days, whereas the fish in aquarium Q was found to be alive and healthy.

(a) What is the aim of the experiment?_______________________________________

(b) In the experiment, state the following.(i) What is being changed?

_________________________(ii) What has being measured?

_________________________(iii) What is kept the same?

_________________________(c) What can be concluded based on the

experiment?_______________________________________

1.3 Animal Have Basic Needs

1. The figure shows an experiment carried out on four plants.

The table shows the results obtained from the experiment.Plant Condition after 1

weekCondition after 2

weeksP Fresh with green

leavesFresh with green leaves

Q The plant wilts and has yellow leaves

The plant dies

R The plant wilts and has yellow leaves

The plant dies

S The plant wilts and has yellow leaves

The plant dies

(a) State what each of these plants is deprived of in the experiment.

(i) Plant Q : ______________________________(ii) Plant R : ______________________________(iii) Plant S : ______________________________

(b) For each of the following plants, draw an inference (reason) based on the observation obtain.

(i) Plant Q : ______________________________(ii) Plant R : ______________________________(iii) Plant S : ______________________________

(c) What can you conclude from the experiment?______________________________________

REVISION SCIENCEYEAR 4

CHAPTER 1: INVESTIGATING LIVING THINGS

SECTION A

Every question is followed by four options A, B, C and D. Choose the correct answer.

1. Which of the following are basic needs of a human?

A P and R only C P, R and S onlyB P and S only D P, Q, R and S

2. What do humans need to help them grow and stay healthy?

A Eat a balanced dietB Stop exercising regularlyC Sleep at least 18 hours a day

DStay outdoors in the rain to get enough water.

3. Which of the following are natural shelters of animal?

J K

L M

A J and K only C J, K and L onlyB K and L only D J, K, L and M

4. In which of these jars will the fish live in the longest?

A C

B D

5. Which is the correct pathway of air during inhalation?

A Nose → Windpipe → LungsB Lungs → Windpipe → Mouth → NoseC Mouth → Nose → Lungs → WindpipeD Windpipe → Lungs → Nose → Mouth

6. Two basic needs of green plants, X and Y, have the following functions.

Which of the following are the basic needs X and Y?

X YA Water SunlightB Water AirC Air SunlightD Sunlight Water

7. Two similar potted bean plants P and Q were used in an investigation. Only plant P was watered daily. The condition of the plants was observed daily. Which of the following would most probably be observed on the fourth day?

Plant P Plant Q

AThe stem is firm and upright with many more green leaves.

The stem is firm and upright, with less green leaves.

BThe stem is taller, firm and upright with larger green.

The stem is limp (flaccid) and bent, with leaves that are curling and turning yellow.

X : To make foodY : To prevent the plants from

drying out (wilting)P – Air R – FoodQ – Car S – Water

CThe stem is taller, firm and upright with larger green leaves.

The stem is firm and upright, with leaves that are curling and turning yellow.

DThe plant is alive, growing and healthy.

The plant has shriveled and died.

8. Which of these are difference between the process of inhalation and exhalation?

Inhalation Exhalation

I

The chest moves upward and outwards

The chest move downwards and inwards.

IIAir enters the lungs. Air expelled from the

lungs.

IIIThe air contains more carbon dioxide

The air contains more oxygen.

A I only C I and III onlyB I and II only D II and III only

9. The removal of faeces from our body is called

A Digestion C DefecationB Excretion D Absorption

10. Which of these is not and excretory organ?

A Windpipe C LungB Kidney D Skin

11. Which of the following organs involved in the defecation process?

A Windpipe C LungB Kidney D Skin

12. Which of the following are the effects of taking alcohol?

I Cause liver damageII Delays a person’s response to stimuliIII They help the spread of AIDS if shared.

A I only C I and III onlyB I and II only D II and III only

13. The following lists the condition of a man.

Which of the following habits does he have?

A Taking drugsB Taking alcoholC Exercising regularlyD Smoking cigarettes

14. The pictures show two animals.

Which of the following animals breathes in the same way as the animals in the pictures?

A Cats C TadpolesB Worms D Grasshoppers

15. Which of the following animals lay their eggs in holes in the soil and sand?

W X

Y Z

A W and X only C W, X and Z onlyB X and Z only D W, X, Y and Z

16. The pictures show four different animals.

Which of the animals gives birth to their young?

He has breathing difficulties He has a severe cough He has bad breath His teeth has turn yellow

A Fox and deer C Dragonfly and lizardB Fox and lizard D Deer and dragonfly

17. The following are characteristic of an animal.

The animal is a

A Fish C TurtleB Prawn D Frog

18. Which of these plants reproduced through spores?

A Ferns C BamboosB Begonias D Bananas plant

19. The picture shows a plant.

Which of the following plants reproduces in the same way as the plant?

A Onion C HibiscusB Begonias D Pineapple

20. Which of the following is not correct?

A Suckers

B Underground stem

C Stem cutting

D Seeds

21. The picture shows a plant that has responded to a certain stimulus.

What stimulus has the plant that has responded to a certain stimulus?

A Water C GravityB Touch D Sunlight

22. What do the roots of a plant respond to?

I SunlightII TouchIII WaterIV Gravity

A I and II only C II and IV onlyB I and III only D III and IV only

23. Some animals pretend to be dead to escape from enemies. Which of these animals behaves in such way?

A Cow C BeetleB Horse D Crocodile

24. The picture shows an animal.

Its lives on land and water Its breath using its lungs when on land Its young use their gills to breath in

water.

Which of these animals protects itself the same way as the animal in the picture?

A Frog C ElephantB Horse D Chameleon

25. Why do camels have humps?A To cool their body in hot climateB To maintain their body temperatureC To store food to survive in the desertD To withstand extreme temperature conditions

26. The picture shows a group of birds flying from one placed to another.

Why do the birds move from one place to another every year?

A To escape of a cold winterB To look for fresh waterC To look for mateD To lay their eggs

27. The pictures show two groups of animals.

P Q

Buffalo Sea Lion

Rhinoceros Whale

Group P Group QA Wallow in the mud Have a thick fat layerB Have humps HibernateC Hide in safe places Have a thick fur coat

DHave a thick fur coat

Migrate from one place to another

28. Which of the following helps cactus plant to protect itself from its enemies?

A Has latexB Has fine hairsC Has many thornsD Produces poisonous substances

29. How does the mimosa plant protect itself from its enemies?

A F and G only C G and H onlyB F and H only D E, F, G and H

30. Which of the following characteristics do not help the plant to survive in places that are frequently blown by strong wind?

A Have flexible stemB Have buttress rootsC Have needle-like leavesD Have thick succulent stems

E : By having hairy leavesF : By folding its leafletsG : By having thornsH : Producing poisonous substances