CBSE Class 5 Science The Skeletal System Worksheet Set 01

LESSON - 7 THE SKELETAL SYSTEM

I - NAME THE FOLLOWING :-

Question 1. A point where two separate bones meet.
Answer: Joint
In simple words: Joints are connections between bones that allow movement.

Exam Tip: Remember that joints connect bones, whereas ligaments connect bone to bone.

Question 2. The joint between two vertebrae.
Answer: Gliding joint
In simple words: A gliding joint allows bones to slide past each other, like in the backbone.

Exam Tip: Gliding joints are found in wrists, ankles, and between vertebrae.

Question 3. A frame work of bones.
Answer: Skeleton
In simple words: The skeleton gives shape and support to the human body.

Exam Tip: An adult human skeleton consists of 206 bones.

Question 4. The other name for backbone.
Answer: Spine or vertebral column
In simple words: The backbone protects the spinal cord and helps us stand straight.

Exam Tip: It is made up of 33 small irregular bones called vertebrae.

Question 5. The joint that allows movement in all directions.
Answer: Ball and socket joint
In simple words: The rounded end of one bone fits into the cup-like cavity of another bone, allowing 360-degree rotation.

Exam Tip: Examples include the shoulder and hip joints.

Question 6. The strong fibres by which the muscles are attached to the bones.
Answer: Tendons

In simple words: Tendons connect muscles to bones to help them move.

Exam Tip: Do not confuse tendons (muscle to bone) with ligaments (bone to bone).

Question 7. The muscles which are under our control.
Answer: Voluntary muscles
In simple words: Muscles that we can move according to our will are voluntary muscles.

Exam Tip: Skeletal muscles or striped muscles are examples of voluntary muscles.

Question 8. The other name of thigh bone.
Answer: Femur
In simple words: The femur is the longest and strongest bone in the human body.

Exam Tip: It is located in the upper leg.

Question 9. Tough tissues by which the bones are held together.
Answer: Ligaments
In simple words: Ligaments are stretchy bands of tissue that bind bones together at joints.

Exam Tip: Ligaments provide stability to joints during movement.

Question 10. Two pairs of lower ribs which are not attached to the breast bone.
Answer: Floating ribs
In simple words: The last two pairs of ribs are attached only to the backbone, not to the breastbone.

Exam Tip: Floating ribs protect the kidneys.

II - FILL IN THE BLANKS:

Question 1. Muscles are made up of tough ________ tissues.
Answer: fibrous
In simple words: Muscle tissue consists of specialized cells that can contract and relax.

Exam Tip: Muscle contraction creates physical force and movement.

Question 2. The ________ covers and protects the brain.
Answer: skull
In simple words: The skull acts as a hard helmet for the brain.

Exam Tip: Except for the lower jaw, all bones in the skull are fixed and immovable.

Question 3. Muscles are attached to the bones by strong fibres called ________.
Answer: tendons
In simple words: Tendons transmit the pulling force from muscles to bones.

Exam Tip: Tendons are extremely strong and inelastic cords.

Question 4. ________ muscles are not under our control.
Answer: Involuntary
In simple words: Involuntary muscles work automatically without us thinking about them.

Exam Tip: Muscles of the stomach, intestines, and heart are involuntary.

Question 5. The ________ protects the heart and the lungs.
Answer: rib cage
In simple words: The rib cage forms a protective bony cage around vital chest organs.

Exam Tip: There are 12 pairs of ribs in a normal human rib cage.

Question 6. In the upper arm there is a long bone called ________.
Answer: humerus
In simple words: The humerus runs from the shoulder to the elbow.

Exam Tip: The lower arm contains two bones: radius and ulna.

Question 7. A break is the bone is called a ________.
Answer: fracture
In simple words: When a bone cracks or breaks, it is termed a fracture.

Exam Tip: Fractures require medical treatment and casts to heal properly.

Question 8. The ________ protects the spinal cord.
Answer: backbone (or vertebral column)
In simple words: The spinal cord runs safely through the hollow channel inside the backbone.

Exam Tip: Damage to the backbone can harm the spinal cord and cause paralysis.

Question 9. The delicate spinal cord passes though the ________.
Answer: vertebral column (or backbone)
In simple words: Each vertebra has a hole through which the spinal cord passes.

Exam Tip: This arrangement protects the central nervous pathway.

Question 10. The ________ and ________ of the muscles move bones.
Answer: contraction, relaxation
In simple words: Muscles pull bones by contracting and push them back by relaxing in pairs.

Exam Tip: Muscles can only pull; they can never push.

III - WRITE TRUE OR FALSE

Question 1. Muscles are attached to the bones by strong fibres called tendons. (          )
Answer: True
In simple words: Tendons firmly connect skeletal muscles to bones.

Exam Tip: Statement is factually correct.

Question 2. We have one pair of limbs. (          )
Answer: False
In simple words: Humans have two pairs of limbs: forelimbs (arms) and hindlimbs (legs).

Exam Tip: Remember humans have 2 pairs (total 4 limbs).

Question 3. There are four types of muscles in our body. (          )
Answer: False
In simple words: There are three main types of muscles: skeletal, smooth, and cardiac.

Exam Tip: Learn the three types: voluntary, involuntary, and cardiac.

Question 4. A break in the bone is called fracture. (          )
Answer: True
In simple words: A cracked or broken bone is medically called a fracture.

Exam Tip: Statement is correct.

Question 5. A frame work of muscles is called skeleton. (          )
Answer: False
In simple words: A framework of bones is called a skeleton, not muscles.

Exam Tip: Skeleton = bones; Muscular system = muscles.

Question 6. The skull is made up of eight flat bones. (          )
Answer: True
In simple words: The cranium protecting the brain is formed of 8 flat bones fused together.

Exam Tip: The face has 14 bones, making 22 bones in total for the skull.

Question 7. The rib cage protects the heart and the lungs. (          )
Answer: True
In simple words: The rib cage shields vital chest organs from external injury.

Exam Tip: Statement is correct.

Ln 8. Food and health

I. Fill in the blanks.

Question 1. Beri Beri is a disease caused by the lack of vitamin ________.
Answer: B1 (Thiamine)
In simple words: Deficiency of Vitamin B1 leads to the deficiency disease Beri Beri.

Exam Tip: Learn vitamin deficiency diseases thoroughly for exams.

Question 2. ________ helps us to fight diseases.
Answer: Immune system (or White blood cells / Vitamins and Minerals)
In simple words: Protective foods and white blood cells protect our body from germs.

Exam Tip: Vitamins and minerals are known as protective nutrients.

Question 3. ________ are made of small quantities of dead or very weak germs of a particular disease.
Answer: Vaccines
In simple words: Vaccines introduce weakened germs so the body can build immunity.

Exam Tip: Vaccination provides long-lasting protection against specific infectious diseases.

Question 4. The full form of DPT is ________.
Answer: Diphtheria, Pertussis (Whooping cough), and Tetanus
In simple words: DPT is a combination vaccine that protects children against three serious bacterial diseases.

Exam Tip: Memorize acronyms like DPT and BCG for science exams.

Question 5. ________ are the smallest micro organisms.
Answer: Viruses
In simple words: Viruses are extremely tiny infectious agents that can only multiply inside living host cells.

Exam Tip: Viruses are much smaller than bacteria.

Question 6. ________ is the swelling of the throat gland.
Answer: Goitre
In simple words: Goitre is caused by a deficiency of iodine in food, leading to swelling of the thyroid gland.

Exam Tip: Use iodized salt to prevent goitre.

Question 7. Vaccination was discovered by ________.
Answer: Edward Jenner
In simple words: Edward Jenner developed the first smallpox vaccine.

Exam Tip: Remember scientist names and their major discoveries.

Question 8. ________ is a disease caused by the deficiency of vitamin C.
Answer: Scurvy
In simple words: Lack of vitamin C causes bleeding gums and weakness, known as scurvy.

Exam Tip: Citrus fruits like amla, lemon, and oranges are rich in vitamin C.

II. Name the following.

Question 1. Five kinds of nutrients.
Answer: Carbohydrates, Fats, Proteins, Vitamins, Minerals
In simple words: These are the five major components required in our diet.

Exam Tip: Water and roughage are also essential components, though not classified as macro-nutrients.

Question 2. Three kinds of food groups.
Answer: Energy-giving food, Body-building food, Protective food
In simple words: Foods are grouped based on the primary function they perform in our body.

Exam Tip: Carbohydrates/fats give energy, proteins build the body, vitamins/minerals protect against disease.

Question 3. Three kinds of microbes.
Answer: Bacteria, Viruses, Fungi (Protozoa can also be included)
In simple words: Microbes are microscopic living organisms found everywhere.

Exam Tip: Not all microbes are harmful; many are useful (e.g., lactobacillus in curd).

Question 4. Two diseases that can be controlled through vaccines.
Answer: Polio, Tetanus (or Measles, Hepatitis)
In simple words: Vaccines build immunity against specific dangerous infectious diseases.

Exam Tip: Timely immunization eradicates deadly diseases.

Question 5. Name a disease caused caused by virus.
Answer: Polio (or Influenza, Common cold, Measles)
In simple words: Viral diseases spread easily from person to person.

Exam Tip: Antibiotics do not work against viral infections.

Question 6. A disease spread by fleas that live on rats.
Answer: Plague
In simple words: Plague is a severe bacterial infection transmitted by rat fleas.

Exam Tip: Maintaining cleanliness and rodent control prevents plague outbreaks.

Question 7. A disease caused by lack of vitamin A.
Answer: Night blindness
In simple words: Vitamin A deficiency leads to poor vision in dim light.

Exam Tip: Carrots, papaya, and green leafy vegetables are rich sources of Vitamin A.

III. Match the following.

Question 1. Match Column A with Column B:
Column A:
1. Roughage
2. Sleep
3. Balanced diet
4. Exercise

Column B:
- give rest and recover the cells.
- keeps our body fit.
- keeps our body healthy.
- helps to get rid of undigested food

Answer:
1. Roughage - helps to get rid of undigested food
2. Sleep - give rest and recover the cells.
3. Balanced diet - keeps our body healthy.
4. Exercise - keeps our body fit.
In simple words: Matching nutritional and lifestyle habits with their correct health benefits.

Exam Tip: Read both columns carefully before drawing matching lines.

IV. Write True or False.

Question 1. Proteins give us energy to do work. ________
Answer: False
In simple words: Carbohydrates and fats provide energy, while proteins build and repair body tissues.

Exam Tip: Proteins are known as body-building foods.

Question 2. Lack of iodine in our food causes anaemia. ________
Answer: False
In simple words: Lack of iron causes anaemia, while lack of iodine causes goitre.

Exam Tip: Always link specific deficiency minerals to their correct diseases.

Question 3. Over cooking of food destroys vitamins and other nutrients. ________
Answer: True
In simple words: Excessive heat destroys delicate vitamins present in food.

Exam Tip: Avoid overcooking vegetables to retain maximum nutrients.

Question 4. We should drink 8-10 glasses of water every day to keep ourselves fit and healthy. ________
Answer: True
In simple words: Water is essential for digestion, waste removal, and overall body functions.

Exam Tip: Statement is correct.