Science 1 Marks Question

What happens in the process of exhalation?

Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give reason for your answer. Crocodile, whale, dolphin, fish.

Why we should cover our nose while sneezing?

A part from stomata another structure is used by plants to respire. Name that structure.

Ravi is sleeping, his rate of breathing will be slowest or higher?

Why does a fish die when kept outside water, even though there is oxygen in the surrounding air?

What happens when we inhale air? in exhaled air.

Fill in the blank with suitable word. Diaphragm forms the __________ of the chest cavity.

What is the difference between cellular respiration and internal respiration?

How does exchange of gases take place in the plants?

What is the end product of anaerobic respiration?

How does the exchange of gases occur in breathing?

Why we feel hungry after a physical activity?

Why we should eat regularly?

Our nostrils has hair and mucous. What is the need to have them in our nasal cavity?

Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give reason for your answer. Lizard, cow, earthworm, snake.

When oxygen enters our body it combines with haemoglobin to form a new substance. What is that new product.

In some animals, exchange of gases takes place through its thin and moist skin. Name one such animal.

Floor of chest cavity refers to which organ of respiration?

What is the total percentage of oxygen and carbon dioxide in inhaled air and exhaled air?

How respiration does occur in plants?

What happens to your breathing rate when you:

• Exercise.
• Go to sleep.

Fill in the blank with suitable word.
Cockroaches breathe with the help of air tubes called _________.

Explain respiration in plants.

Why mountaineers carry oxygen with them?

A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too.
Why did the dough rise?

Why human breathing mechanism is called tidal breathing?

Which of the two is usually oxidized during respiration? Carbohydrate or fats?

Certain small pores are present on the surface of plant through which gaseous exchange occurs. Identify these pores?

Which cell organelle is a site for cellular respiration?

What will be the direction of diaphragm as we breathe in, and ribs move up or expand?

What is the site of cellular respiration?

On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.

Fill in the blank with suitable word. Exchange of gases in the leaves takes place with the help of _______.

Name the respiratory organ of earthworm.

What are different types of respiration.

Which gas present in air is essential for aerobic respiration? What is the role of this gas during respiration?

Respiration is a continous process. What is the need for it to be continuous rather than being like photosynthesis?

Name the respiratory organ of frogs.

Name a single celled fungus and respires anaerobically to produce alcohol.

The process of fermentation is based on which principle?

Explain cellular respiration.

Paheli participated in a 400m race competition held at her school and won the race. When she came home she had mixed feelings of joy and pain as she had cramps in her leg muscles. After a massage she was relieved of the pain. Answer the following questions related to the situation. What can be the possible reasons for the pain in her legs?

Insects have a special organ present to carry out respiration. What is that organ called?

How does exchange of gases take place in unicellular and smaller multicellular animals?

Write short notes on gills.