case /data -based (4 Marks)

Question 14 Marks

Mark ills a bottle completely with water.
The bottle has three same sized plugged holes on its wall.
Mark pulls out the plugs and checks the position of the stream of water coming out.

$7.$ What does Mark’s activity show$?$
$A.$ Liquids exert pressure.
$B.$ Liquids contract on cooling.
$C.$ Liquids cannot be compressed.
$D$. Liquids have no deinite shape.
$8.$ Which of these is an example of a contact force$?$
$A.$ A guava falling from the tree.
$B.$ A magnet attracting a hanging iron nail.
$C.$ A plastic comb attracting small pieces of hair.
$D.$ A boat moving on water by the action of wind on its sail.
$9.$ Which of these is true for force$?$
Circle ‘Yes’ or ‘No’ for the correct response.

Is this Correct?	Yes or No
A force can change the state of motion of an object.	Yes/No
A force can change the shape of an object.	Yes/No
A force can act between two solid objects only.	Yes/No

$7.$

$P, Q, R$ and $S$ are four solid objects having the same mass.
Which object is exerting the least pressure on the table$?$
$A. P$
$B. Q$
$C. R$
$D. S$

Answer

$7. A.$ Liquids exert pressure
$8. D.$ A boat moving on water by the action of wind on its sail.
$9.$ Yes
Yes
No
$10. B. Q$

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Question 24 Marks

Four students wanted to ind out who could kick a football the strongest. Each student kicked the football.

The table shows the distance the football travelled in air before hitting the ground.

	Student $1$	Student $2$	Student $3$	Student $4$
Distance the ball travelled in air before hitting the ground	$10\ m$	$12\ m$	$8\ m$	$14\ m$

$4.$ Which student kicked the ball with the greatest force$?$
$A$. Student $1$
$B.$ Student $2$
$C.$ Student $3$
$D.$ Student $4$
$5.$ Shade the columns in the graph to correctly show the data in the table.

$6.$ Which of these factors must remain the same when each student kicks the football$?$
Circle ‘Yes’ or ‘No’ for the correct response.

Factor that must remain the same	Yes or No
Type of ground surface	Yes/No
Direction and speed of the wind	Yes/No
Size of the shoe worn by the student	Yes/No

Answer

$4. D.$ Student $4$
$5.$ Shades the columns as shown below

$6.$ No
Yes
No

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Question 34 Marks

Two groups of students are playing tug-of-war.

$2.$ Choose the correct direction of force applied by Group $1$ and Group $2.$

$3.$ Group $1$ is pulling with $250\ N$ force and Group $2$ is pulling with $300\ N$ force.
What would be the likely position of the two groups after a minute of pulling$?$

Answer

$2. D.$ Image
$3. A.$ Image

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Question 44 Marks

What type of force is involved in each of the given conditions$?$
Put a tick mark (✔) for the response in terms of push or pull.

Condition	Push	Pull
Hitting a ball with a bat.
Sucking milk shake with a plastic straw.
Lifting a school bag from a desk.

Answer

Push
Pull
Pull

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Science case /data -based (4 Marks)

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