Sone hardeo international School

Answer the following questions: 1. What is the percentage of oxygen in the atmosphere? Ans: The  percentage of oxygen in the atmosphere is 21%  . 2. Name the instrument which is used to measure atmosphere pressure. Ans: The  instrument which is used to measure atmosphere pressure is Barometer . 3. Name two methods of purify water. Ans : Boiling and filtration are two  methods of purify water . 4. What is loading Ans: Loading is process in which heavy particles settle down at the bottom . 5. Write an activity to show that air occupies space. Ans:  • Take an empty glass and a bucket half filled with water. • Put the inverted glass into the bucket of water. This must be done very quickly and forcefully. The glass must be kept straight and put inside in an inverted position. • The water does not enter the inverted glass. Why? The air present in the empty glass prevents the water from entering it. • When we tilt the glass held in water, we find that of air present in...

  Answer the following questions:  1. Name the various nutrients of the food. Ans: The various nutrients of food are carbohydrates, fats, proteins, vitamins and minerals . 2. Why are vitamins called protective foods? Ans: Vitamins are called as protective foods because vitamins protect our body from from diseases and keep our body healthy . 3. Name the different types of vitamins. Ans: Different kinds of vitamins are  Vitamin A,  Citamin B (B-complex), Vitamin C , Vitamin D , Vitamin E, Vitamin K . 4. What are functions of different minerals? Ans: Different minerals have different functions such as Iron builds red blood cell (RBC) Iodine is essential for the proper functioning of the thyroid gland which controls the growth of the body . Calcium makes the teeth and bones strong  5. What is roughage? Why is it important? Ans: Roughage keeps the food and waste matter (faeces) moving along the intestines and helps to prevent constipation . 6. Why is water necessary ...

  A. Which one is correct ? 1. Accidents can happen at any _______ a. place b. time c. both Ans: C  2. We need to take extra care in the ____ a. field b. school c. kitchen  Ans: C 3. ________ is necessary for any thing to burn . a. nitrogen  b. oxygen c. carbon di oxide Ans: b B. Fill in the blanks : 1. Accidents can happen at any place and time . 2.  Carelessness lea ds to accidents. 3. In case of fire breaks due to an electric fault do not try to extinguish it with water . 4. In case of big fires, call for a fire brigade . 5. A dog bite can cause a disease called rabies . 6. Cross the road using a subway or at the zebra crossing . 7. Throw banana peels and other wastes in the dustbin to avoid slipping . 8. We can throw sand or mud on petrol and kotodin fire . C. Write 'T' for true or 'F' for false : 1. Carelessness leads to accidents. True 2. We need to take extra care in the kitchen. True 3. Keep to the right while walking on the road. False 4. Never use...

 Important question answer from the topic Nervous system  A. Which one is correct ? 1. Our nervous system consists of the brain, the spinal cord and the a. blood vessels b. nerves c. lungs  Ans: c) lungs 2. Our brain needs a constant supply of a. oxygen b. nitrogen c. lungs Ans: a) oxygen 3. When we happen to touch a hot object, the sensory nerve immediately passes a message to the a. brain b. spinal cord c. hands Ans: a) brain 4. ______is the largest organ in our body. a. skin b. nose C. ears Ans: a) skin B. Fill in the blanks : 1. The brain is control centre of the body . 2. The brain has three parts . 3. There are nerve endings on the upper part of the nose . 4. The coloured circle in the eye is the iris . C. Write 'T' for true or 'F' for false : 1. The cerebellum coordinates the actions of the muscles. Ans: True  2. The actions controlled by the spinal cord are called reflex actions.  Ans: True 3. The ears enable us to keep our balance. Ans: True 4. The...

  Questions answer of Skeletal System :    Questions types :  Mcq, fill in the blanks, match the following, True or false , long questions. A: Which one is correct? 1. Our body has _______ a. 206 bones  b: 306 bones c. 300 bones  Ans: 206 bones 2. This joint allows the maximum movement a. pivot joint  b. hinge joint c. glidin joint Ans: pivot joint 3. Muscles are attached to the bones with fibras a. ligaments b. bone marrow c. tendons Ans: tendons 4. These muscles are under our control:  a. muscles attached to our skeleton b. cardiac muscles C. none of (a) and (b) Ans: muscles attached to our skelton . B.Fill in the blanks : 1. The human skeleton is a framework of bones .  2. The normal adult skull is made up of 22 bones . 3. The thigh bone is attached to the hip bone. 4. Bones join together to form joints . D. Write T' for true or 'F' for false : 1. There are three main types of joints. Ans:  false 2. The skeleton muscles lie between...

A.Which one is correct ? 1. Amphibian live ________ a. on land b. In water  c. both a and b  2. Insects have _________ legs. a. six b. five  c. four 3. A turtle have ________ limbs . a. two b. three c. four B. Fill in the blanks : 1. Fish breathe with the help of their Gills and swim with the help of Fins . 2. Bird s breathe through their lungs, and have a body covered by feathers. 3. Amphibians breathe through their lungs  on the land and through moist skin in water. 4. Mosquitoes , beetles and aphids  are harmful destructive insects. C. Write T' for true or 'F' for false : 1. All animals can be divided into four groups.  Ans: False   2. Most fish have two sets of paired fins. Ans: True 3. Gills take in oxygen and give out carbon dioxide. Ans: True 4. All insects and worms are vertebrates. Ans: False D. Match the following: 1. Salmon , gold fiish A. Reptiles 2. Crow, pigeon, sparrow B. Amphibians 3. Lizard, crocodile, snake C. Fish 4. Mouse , go...