P3/4 science - SAP Education

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P3/4 science

1. Look at the picture of the human skeletal system below.

Which one of the following represents the parts of the skeletal system correctly?

A B C D

(1) skull backbone hip bone leg bone

(2) skull rib cage back bone thigh bone

(3) skull back bone rib cage leg bone

(4) cheek bone rib cage back bone thigh bone( )

2. Which one of the following statements about the skeletal and muscular systems is notcorrect?(1) Without our muscles and bones, we cannot move our body.(2) Our muscles are attached to the bones.(3) Our bones relax and contract when we move.(4) Our muscles pull on our bones to make them move. ( )

3. Which one of the following statements about our bones is incorrect?(1) The bones in our body are joined to one another.(2) All the joints in our body allow free movements.(3) Some bones are straight while some are curved.(4) The bones in our body come in different sizes. ( )

A

B

D

C

Your Amazing Body

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P3/4 science

4. Which of the bones has been wronglyclassifiedintheclassificationdiagram?

(1) backbone (2) toe bone (3) ribs (4) hip bone ( )

5. The picture below shows the skeleton of an animal.

Based on what you see from the picture, which one of the following statements is most likely true about the animal?(1) It is a fast running animal.(2) It is a meat-eater.(3) It has a pair of wings.(4) It can grip onto other things tightly. ( )

6. The graph below shows the pulse rate of an adult performing a certain task.Pulse rate

(times per minute)

50

100

Time (minute)Which task do you think the person is performing?(1) He is cooling down after a sprint.(2) He is falling asleep.(3) He is watching a horror movie.(4) He is chasing after a sheep. ( )

Your Amazing Body

Bones

Protect the organs Support the body

hip bone ribs

skull

backbone knee bonetoe bone

Answers: 1. 2 2. 3 3. 2 4. 4 5. 3 6. 1

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P3/4 science

1. Which of the following is not part of the digestive system?(1) stomach(2) large intestine(3) windpipe(4) mouth ( )

2. Mrs Edison would always mash the soft, boiled carrots before feeding her young son.

With reference to the diagram above, in which part of the digestive system will a similar action take place if Mrs Edison does not mash the boiled carrots before feeding them to her son?(1) A(2) B(3) C(4) D ( )

3. Which of the following statements is false?(1) Digestion is completed in the large intestine.(2) Blood carries the digested food from the small intestine to all parts of the body.(3) Digestive juices can be found in the small intestine.(4) The anus is part of the digestive system. ( )

4. Which of the following statements are true about the digestive system?A. Saliva helps to moisten the food and form it into a bolus for easy swallowing.B. Choking occurs while eating when air enters the gullet accidentally.C. It takes between 24 and 72 hours for the process of digestion to complete in an adult.D. The small intestine is made up of many folds to give a greater surface area for absorption

of the digested food and nutrients.(1) A and B only(2) A and C only(3) A, C and D only(4) A, B, C and D ( )

A

D C

B

The Digestive System

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P3/4 science

5. Norman had just eaten his dinner. The food that he had eaten would be digested with thehelp of the digestive juices produced in the .A. mouthB. gulletC. stomachD. small intestineE. large intestineF. anus(1) A and C only(2) A, C and D only(3) A, B, C and D only(4) A, B, C, D, E and F ( )

6. Which parts of the digestive system listed below do not digest the food?A. mouthB. gulletC. stomachD. large intestineE. rectum(1) A and C only(2) B and D only(3) D and E only(4) B, D and E only ( )


Answers: 1. 3 2. 2 3. 1 4. 3 5. 2 6. 4

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P3/4 science

1. Gregory belched loudly after gobbling down his dinner. Which statement(s) explain(s) thereason for his belching?A. Belching allows his body to expel the gas from the stomach.B. Belching is a sign that he had eaten too much.C. Besides swallowing his food and drink for dinner, Gregory also swallowed air at the

same time.(1) A only(2) A and B only(3) A and C only(4) A, B and C ( )

2. Study the information given in the table shown below.

Parts of the digestive system Function

A Pushes the chewed food down into the stomach

B Passes out the waste materials

C Allows the digested food to be absorbed

D Absorbs liquid from the undigested food

What are the parts, A, B, C and D, of the digestive system likely to be?

A B C D

(1) gullet rectum small intestine large intestine

(2) gullet anus small intestine large intestine

(3) tongue anus small intestine large intestine

(4) tongue rectum large intestine small intestine( )

3. What is the main function of the human digestive system?

(1) It gets rid of toxins in the body.(2) It carries the waste materials away from the body.(3) It converts the digested food into energy for the body.(4) It breaks down food into simpler substances so that the body can use them for energy.

( )


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P3/4 science

4. Which of the following statements are false about the digestive system?A. Digestive juices are added to the food in the small intestine to complete the digestion.B. Digestive juices are produced only in the mouth

and stomach to break down the food particles.C. Solid wastes are passed out from the body through the rectum.D. The muscles of the gullet relax and contract to move the food particles down from the

throat into the stomach.(1) A only(2) A and B only(3) B and C only(4) B, C and D only ( )

5. What will happen if the small intestine is missing from the digestive tract?A. Digestion cannot be completed.B. The body cannot absorb the digested food.C. The food will not be churned.(1) A only (3) B and C only(2) A and B only (4) A, B, C and D ( )

6. How is the length of the small intestine useful in the digestive system?(1) It allows the digested food to stay longer in the body.(2) It increases the surface area for absorption of digested food into the body.(3) It makes the person feel full for a longer period of time.(4) It helps the intestine to produce more digestive juices. ( )


Answers: 1. 3 2. 2 3. 4 4. 3 5. 2 6. 2

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P3/4 science

1. The following parts can be found in a human body.

(a) Completethefirstrowofthetablebelowbywritingdownthefivemainsystemsinourbody. [1m]

(b) Fill in the rest of the table using the list above. [4m]

Our Body Systems

blood vessels muscles stomach rib cage mouth joints nose heart windpipe skull small intestine large intestinegullet backbone anus lungs

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P3/4 science

(c) Choosing from the same list, state the missing part which causes the followingmalfunctions in the human body. [5m]

Malfunction Missing body part

The brain is not protected from a hard knock.

The body cannot stand up straight.

Food cannot travel from the mouth to the stomach.

Water cannot be absorbed from undigested food.

Blood cannot travel throughout the body.

Wastes cannot be passed out of the body.

The lung collapses after someone hits the person lightly on the chest.

Air cannot enter the body.

Fingers cannot bend to pick up an object.

Food cannot enter the body.

Our Body Systems

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P3/4 science

1. (a); (b)

Skeletal system Respiratory system

Muscular system

Digestive system

Circulatory system

skull windpipe muscles stomach blood vessels

backbone lungs gullet heart

rib cage nose anus

joints mouth

large intestine

small intestine

(c)

Malfunction Missing body part

The brain is not protected from a force of an impact that will cause injury to it. skull

The body cannot stand up straight. backbone

Food cannot travel from the mouth to the stomach. gullet

Water cannot be absorbed from undigested food. large intestine

Blood cannot travel throughout the body. blood vessels

Wastes cannot be passed out of the body. anus

The lung collapses after someone hits the person lightly on the chest. rib cage

Air cannot enter the body. nose

Fingers cannot bend to pick up an object. joints

Food cannot enter the body. mouth

Answers To Our Body Systems

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P3/4 science - SAP Education

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