Earthworms skin is

In the cells Oxygen is used to break down

During heavy exercise when supply of oxygen to our muscles is insufficient food breakdown is by

What are the products of anaerobic respiration in a human cell?

Small openings on the side of the cockroaches body is called as

Yeast is a

What is the organ used in plants for respiration ?

Air tubes in insects are also called ___________.

2 tubes entering the lungs

Tiny air sacs of the lungs where oxygen and carbon dioxide are exchanged are ________________.

Given the following structures:

1. larynx

2. nasal cavity

3. pharynx

4. trachea

Which of the following is the correct order that air would flow during inhalation.

Which of the following is not happening during inhalation?

Simon breathes in and out of a paper bag three times. How has the oxygen and carbon dioxide in the bag changed after three breathes?

Latha is observing her image in a plane mirror. The distance between the mirror and her image is 6 m. If she moves 2m towards the mirror then the distance between latha and her image will be

If you are standing 2m away from a plane mirror the distance between you and your image are

Images that can't be captured on a screen are called

Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size, whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli respectively are

Convex lens is also called as

Which of the following always diverge light rays?

Which of the following would you prefer to use while reading small letters found in a dictionary?

(a) A convex lens

(b) A convex mirror

(c) A concave lens

(d) Either (a) or (b)

if an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be

The splitting of white light into its seven colours is known as?

The inner surface of a steel spoon acts as a ………………….. mirror.

When we stand in front of our dressing table, our left hand seems to be right and right seems to be left. This is called

The above lens is a type of ___.

What type of lens is used in the shown instrument?

A shopkeeper wants to keep an eye on his store in order to prevent shoplifting. What could the shopkeeper hang on the wall in order to see a wider image of his store and his customers?

Type of mirror used as a side mirror on a vehicle to provide a wide angle view...

The chemical formula for Magnesium Oxide ?

What all are the things that are formed after a chemical change ?

The shipping industry has to bear huge financial loss because of rusting of ships . The rusting of ships occur because :

What is stainless steel mixed with so that it does not rust ?

Which one of the following is a chemical change ?

Equation for reaction between carbon dioxide and lime water :

Which of the following examples represents a physical change?

A teacher is demonstrating physical and chemical changes to her class. Which action should they use to demonstrate a chemical change?

Physical and chemical properties can be used to classify substances. Which of these shows a chemical property?

When a person chews, saliva from the mouth mixes with starches in food. These starches begin to turn into sugars. Changing starches into sugars is BEST described as

When iron combines with oxygen in a moist environment, rust forms because of a

Complete the following equation:

Magnesium (Mg) + Oxygen ------->________________

For rusting, the presence of ____________ and _______________ are essential

Complete the following equation (Reaction Between Carbon Dioxide and Lime Water):

Carbon Dioxide + Lime Water --> (Gives) _______________ + _______________

____________ is the process of obtaining pure solid crystals having definite geometrical shape.

Stainless Steel is made by mixing iron with _______ and metals like chromium, nickel and ______. It does not rust.