Science 1 Marks Question

Yadu conducted an experiment to test his idea. He took two test tubes, A and B, and added a pinch of rich flour to the test tubes half-filled with water and stirred them properly. To test tube B, he added a few drops of saliva. He left the two test tubes for 35-45 min. After that, he added iodine solution into both the test tubes. Experimental results are as shown in Fig. What do you think he wants to test?

Paridhi and Anusha of Grade 7 started running for their morning workout. After they completed their running, they counted their breaths per minute. Anusha was breating faster than Paridhi. Provide at least two possible explanations for why Anusha was breathing faster than Paridhi.

Which of the following statement is correct and why?
Anu: We inhale air.
Shanu: We inhale oxygen.
Tanu: We inhale air rich in oxygen.

Complete the journy of food through the alimentary canal by filling up the boxes with appropriate parts

Which organ forms two branches that enter the lungs?

What is the name of the doctor who found that the stomach performs churning of food?

What is the opening through which air enters the nose?

What is the watery fluid in the mouth?

What is the term used for the process of taking in air?

Name the gas that turns lime water milky.

What is the length of the large intestine?

Which organ secretes the juice that helps neutralise the acid?

What is the last part of the digestive system?

Which organ produces bile?

What are the functions of the stomach?

What do you understand by celiac disease?

How does smoking affect our health?

Arrange the following in the correct sequence: Mouth, stomach, small intestine, oesophagus, large intestine, anus, rectum.

What is the function of bile secreted in the human body?

Name the organs that form the digestive system in human beings.

Give the word equation of the process of respiration.

Name the balloon-like structures in the respiratory system.

What is the function of saliva?

Explain digestion in the mouth.

Where is water absorbed in the digestive system?

Name the organ that constitutes respiration in fish.

Which chemical would you select to test the presence of starch in the food item?

What is the role of the pancreas?

What are ruminants?

Define the term egestion.

What is the length of the small intestine?

What is the percentage of exhaled carbon dioxide during the breathing mechanism?

Name the process by which energy is obtained by a living organism.

Is the process of respiration the same in all animals?

Cows keep chewing the food even when they are not actively grazing or eating anything. Why?

What does the windpipe divide into?

Which part of the respiratory system helps trap dust?

What is respiration?

Name one animal that uses gills to breathe.

What is egestion?

Which part of the body absorbs water from undigested food?

What is the function of bile?

Name the digestive enzymes in the mouth.