CBSE Class 5 Science Practice Worksheet Set 04

Q.1 Fill in the blanks with suitable words.

Question 1(1). A group of organs together are called _________________ .
Answer: organ system
In simple words: Organs work together in systems to perform major body functions.

Exam Tip: Remember that cells make tissues, tissues make organs, and organs make organ systems.

Question 1(2). _________________ organ helps in breathing.
Answer: Lungs
In simple words: Lungs take in oxygen and give out carbon dioxide.

Exam Tip: The main respiratory organs in humans are a pair of spongy lungs.

Question 1(3). The largest & heaviest internal organ is _______________ .
Answer: Liver
In simple words: The liver is the heaviest internal organ in the human body.

Exam Tip: Do not confuse internal organs with skin, which is the largest organ overall.

Question 1(4). Human body has _______________ muscles in their body.
Answer: more than 600 (or 650)
In simple words: There are hundreds of muscles that help us move.

Exam Tip: An adult human body typically has over 600 muscles.

Question 1(5). _______________ filter the blood & throw out waste in the form of urine.
Answer: Kidneys
In simple words: Kidneys clean the blood and produce urine.

Exam Tip: Kidneys are the primary organs of the excretory system.

Q.2 Write the correct words / numbers.

Question 2(1). J shaped organ. ______________________
Answer: Stomach
In simple words: The stomach stores and digests food.

Question 2(2). Bones in an adult body. ______________________
Answer: 206
In simple words: An adult human skeleton has 206 bones.

Exam Tip: Babies are born with about 300 bones, which fuse together as they grow.

Question 2(3). Heart beats in a minute. ______________________
Answer: 72 times (approximate normal resting rate)
In simple words: A healthy adult heart beats about 72 times per minute.

Exam Tip: 72 beats per minute is the standard average resting heart rate.

Question 2(4). Bean shaped organ ______________________
Answer: Kidney
Answer: Kidney
In simple words: Kidneys look like dark red kidney beans.

Exam Tip: We have a pair of bean-shaped kidneys in our lower back.

Question 2(5). A part helps in breathing. ______________________
Answer: Nose / Trachea / Lungs
In simple words: Lungs and windpipe help in the breathing process.

Exam Tip: Lungs or trachea are correct answers for respiratory organs.

Q.3 Match the following.

Question 3. Match column (A) with column (B).
(1) Digestive system - (d) Intestine
(2) Respiratory system - (e) trachea
(3) Skeletal system - (a) muscles
(4) Excretory system - (b) kidney
(5) Nervous system - (c) spinal cord
Answer:
(1) Digestive system - (d) Intestine
(2) Respiratory system - (e) trachea
(3) Skeletal system - (a) muscles (or bones/framework)
(4) Excretory system - (b) kidney
(5) Nervous system - (c) spinal cord
In simple words: Each organ system matches with its key anatomical part.

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

Question 5(1). What is the skeleton?
Answer: The framework of bones that gives shape, support, and protection to the human body is called the skeleton.
In simple words: The skeleton is the hard framework of bones inside our body.

Exam Tip: Mention both support and protection of internal organs in your definition.

Question 5(2). Name the organs of digestive system, circulatory system.
Answer:
Digestive system organs: Mouth, food pipe (oesophagus), stomach, small intestine, large intestine.
Circulatory system organs: Heart, blood vessels, and blood.
In simple words: Digestive system breaks down food, while circulatory system pumps and transports blood.

Exam Tip: List the major organs in sequential order for digestion.

Question 5(3). Name the two blood vessels in circulatory system.
Answer: The two main types of blood vessels are arteries and veins (along with capillaries).
In simple words: Arteries carry blood away from the heart, and veins bring blood back to the heart.

Exam Tip: Remember: Arteries carry oxygenated blood (mostly), and veins carry deoxygenated blood (mostly).

Question 5(4). Explain the process of respiration.
Answer: Respiration is the process in which the body takes in oxygen from the air through the respiratory organs (lungs) and uses it to break down digested food to release energy, producing carbon dioxide as a waste product which is then breathed out.
In simple words: Respiration is taking in oxygen to release energy from food and giving out carbon dioxide.

Exam Tip: Do not confuse breathing (physical process) with respiration (chemical process releasing energy).

Question 5(5). Write the function of spinal cord.
Answer: The spinal cord acts as a main communication pathway between the brain and the rest of the body, and it also controls reflex actions.
In simple words: The spinal cord carries messages between the brain and the body.

Exam Tip: Spinal cord is a thick bundle of nerves protected inside the backbone.

Q. 1. Fill in the blanks.

a. Fishes breathe with the help of ___________________.

b. The seasonal movement of birds are called _________________.

c. The ____________system helps in movement .

d. The backbone is also called the _________________.

e. The ___________ is the largest part of the brain

f. Particles of a substance start vibrating faster on _______________.

g. Matter is composed of tiny particles called _____________.

h. Fire caused due to electrical faults is never put out using ____________.

Q. 2 State TRUE OR FALSE

a. There are seven main habitat on our planet. __________

b. Electrical faults can cause fire __________

c. Medulla is also called the brain stem. __________

d. .The spinal cord is made up of nerve tissue.. __________

Q. 3. Answer the following questions.

(i) What is cerebrum?

(ii) What do you mean by traffic signals?

(iii) How do polar bears withstand the cold of their habitat ?

(iv) What makes liquid flow ?

Q. 4 Draw the diagram of any one of the following

(a) Hinge joint or ball and socket joint

          or

(b) Reflex action

Q. 5 Give one word : 

(i) Ribs which are not attached to the sternum _______________

(ii) Insects breathe with help of tiny holes called _______________

(iii) Medulla is also called the _______________

(iv) Any substance that has mass and occupies space _______________

Q.1) Fill in the blanks

a. We need a ______ diet to stay healthy.

b. ________ can protect against diseases like Polio, Measles and Mumps.

c. The spread of _________ diseases can be prevented by keeping clean.

d. Polio and chickenpox is caused by ________.

e. Beri - Beri is a disease caused by the deficiency of _______.

f. The deficiency of iodine is called________.

g. _____ & ______ are rich sources of Iron.

h. Milk, Pulses & Fish are rich sources of ________.

i. Typhoid & Plague are caused by ______.

j. HIV is a virus that attacks the ________ system.

Q.2) Define:-

a. Deficiency diseases.

b. Communicable diseases.

c. Pasteurization

d. Vaccination

Q1 FILL IN THE BLANKS

1. The arrangement of __________ differs in different states of matter.

2. A molecule can be further broken down into still smaller units called _________.

3. __________ is the smallest unit of a substance that has all the properties of that substance .

4. Molecules are constantly __________ towards each other and always in a state of ______________.

5. All kinds of matter in the world are made up of about _________ kinds of atoms.

6. Potassium permanganate is ________ (soluble/insoluble) in water.

7. Two liquids that do not dissolve in each other are called_______________.

8. _____________ or ___________ brings about __________changes in matter.

9. There are many ___________ changes which keep on occurring inside our body all the time.

10.Water in the oceans, river and lakes contains dissolved ___________ and ______________.

11.Gases like ____________ and __________ dissolve in water.

12.Atoms of the same kind combine and form ___________________.

13.Atoms of different kinds combine and form ____________.

Q2) Differentiate between solids , liquids and gases.

Q3) Write 3 characteristics feature of a physical change.

Q4) Why bubbles are formed on the sides of vessel and at the bottom of the water when water starts boiling?

Q5) Say whether the following changes are physical or chemical

1. Changing of milk into curd.

2. Melting of ice.

3. Breaking of glass.

4. Mixing of salt in water.

5. Changing of wheat to chapatti

6. Burning of coal.

Q1 Answer the following .

a) Name the five layers of atmosphere.

b) Name the gases present in the atmosphere.

c) From where do animals get nitrogen.

d) Write the six properties of air.

Q2 Define

a) Evaporation

b) Distillation

c) Humidity

d) Atmosphere

Q3 Write three methods we should follow at home to purify water.

Q4 Fill in the blanks :-

a) Atmosphere retains ________ and blocks out the ___________.

b) Underground water from _______________ and _____________________ is usually free from ______________ and is safe to drink.

c) Insoluble impurities can be removed from water by ______ and ______________.

d) Soluble impurities can be removed from water by ______________ and by _____________.

e) Space shuttles moves about in _______________ layer.

f) Meteorites or the small rocks moving about in space burn out in _____________ layer.

g) Impure water contains many disease causing germs like those of _________ , ______________ and _______________.

h) __________________ crystals are added to wells for killing germs.

i) The atmosphere also prevents ____________ from hitting the surface of the earth.

Q5 Explain the process of Distillation.

Q6 Write the composition of air.

Q7 list the things when dissolved in rainwater makes it impure

Q-1 DEFINE

  a) Environment

  b) Migration

Q-2 Fill in the blanks

  1) Insects breathe through air holes on their body called ____________.

  2)_________ and ________ breath through gills.

  3)A baby frog or tadpole breathe through its _______ whereas an adult frog breath through____.

  4) ______, ______ and_______ breathe with the help of lungs.

  5) ______,_______and _______ have small and sharp front teeth they ______their fruit and seeds.

  6) In mammals with four limbs front limbs are called______ limbs and two at the back one called____ limbs.

  7) Fish have ______ for swimming and the ______,______helps to change the direction of movement.

  8) ______ use their flippers to push water and swim.

  9) Frogs have ______ feet to swim ,but on land they jump with their long ______.

  10) The Emu, ostrich ,rhea, penguin and kiwi are _______ birds.