Science And Health For Grade 4

1. 2. The bones that protects the lungs is the ________.

A.backbone

B.hipbone

C.ribs

D.skull

The ribs are a set of curved bones that form a protective cage around the lungs. They connect to the spine at the back and wrap around the chest, providing support and protection to the vital organs, including the lungs. The ribs also play a role in the mechanics of breathing, expanding and contracting to allow for the inhalation and exhalation of air. Therefore, the correct answer is c.ribs.

Explanation

The ribs are a set of curved bones that form a protective cage around the lungs. They connect to the spine at the back and wrap around the chest, providing support and protection to the vital organs, including the lungs. The ribs also play a role in the mechanics of breathing, expanding and contracting to allow for the inhalation and exhalation of air. Therefore, the correct answer is c.ribs.

2. 4. A woman met an accident. Her spinal column was hit and she became paralyzed. This is because her ______.

Arms were losta.arms were lost

B.legs were broken

C.heart was damaged

D.spinal column was damaged

The woman became paralyzed because her spinal column was damaged. The spinal column is responsible for transmitting signals between the brain and the rest of the body. When it is damaged, it can disrupt the communication between the brain and the limbs, resulting in paralysis.

Explanation

The woman became paralyzed because her spinal column was damaged. The spinal column is responsible for transmitting signals between the brain and the rest of the body. When it is damaged, it can disrupt the communication between the brain and the limbs, resulting in paralysis.

3. 1. The Body system that gives the body its shape is the ______.

Digestive systemdigestive systemdigestive systemdigestive systemdigestive systemdigestive systemdigestive systemvvvdigestive systemdigestive systemdigestive systemdigestive systemdigestive systema.digestive system

B.nervous system

C.muscular system

D.skeletal system

The skeletal system is responsible for giving the body its shape. It consists of bones, cartilage, and ligaments that provide support and structure to the body. The bones also protect internal organs and allow movement through the attachment of muscles. Without the skeletal system, the body would not have a defined shape and would not be able to perform various functions such as standing, walking, or holding objects.

Explanation

The skeletal system is responsible for giving the body its shape. It consists of bones, cartilage, and ligaments that provide support and structure to the body. The bones also protect internal organs and allow movement through the attachment of muscles. Without the skeletal system, the body would not have a defined shape and would not be able to perform various functions such as standing, walking, or holding objects.

4. 5. You and your friends were having a race. All of a sudden, one of your friends stopped running and shouted for help. She had a sprain in here ankle. What would you do?

A.place an ice bag to the sprained part.

B.rub the sprained part to keep it warm.

C.place hot water bag to the sprained ankle.

D.let your friend walk to the school clinic.

In case of a sprained ankle, placing an ice bag on the sprained part is the correct course of action. Ice helps to reduce swelling and inflammation by constricting blood vessels and numbing the area. This can provide immediate relief and prevent further damage. Rubbing the sprained part to keep it warm or applying hot water can worsen the swelling and increase pain. It is not advisable to let the friend walk to the school clinic as walking on a sprained ankle can cause further injury.

Explanation

In case of a sprained ankle, placing an ice bag on the sprained part is the correct course of action. Ice helps to reduce swelling and inflammation by constricting blood vessels and numbing the area. This can provide immediate relief and prevent further damage. Rubbing the sprained part to keep it warm or applying hot water can worsen the swelling and increase pain. It is not advisable to let the friend walk to the school clinic as walking on a sprained ankle can cause further injury.

5. 3. You can turn your head without turning your body because your ________.

Pivot joint connects the skull to the necka.pivot joint connect the skull to the neck

B.hinge joint connect the skull to the neck

C.gliding joint connect the skull to the neck

D.ball and socket connect the skullt to the neck

The correct answer is a. pivot joint connect the skull to the neck. This is because a pivot joint allows for rotation around a central axis, which is necessary for the movement of the head without turning the entire body. The pivot joint between the skull and the neck allows for the movement of the head in various directions, such as nodding, shaking, and rotating.

Explanation

The correct answer is a. pivot joint connect the skull to the neck. This is because a pivot joint allows for rotation around a central axis, which is necessary for the movement of the head without turning the entire body. The pivot joint between the skull and the neck allows for the movement of the head in various directions, such as nodding, shaking, and rotating.