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Identify yarn from the given images.

What are the full forms of CNG and LPG? Write their uses? [3 MARKS]

Why does water form lumps when it is thrown up into the air?

Mattresses, quilts (i.e. bedding made of two layers of cloth filled with stuffing and stitched together) or pillows are stuffed with:

Mention three properties of the liquid state. [3 MARKS]

Smog is a combination of:

The process in which fibres such as cotton or wool are prepared prior to spinning is called which of the following terms?

Which of the following statement/s describe the solution?

STATEMENT 1: A solution is a homogenous mixture of two or more substances.

STATEMENT 2: Brass is a solid-solid mixture.

STATEMENT 3: Solutions are mixtures of different molecules that are evenly distributed.

STATEMENT 4: Lemonade is an example of a solution.

The average depth of the water table in a particular city is found to be 200 m. What should be the depth of the borewell in order to fetch ground water?

Aditya took a steel spoonful of salt water and heated the spoon over the spirit lamp. Which of the given statements are correct about his observation?

• Infiltration
• Leaching [2 MARKS]

On decreasing the temperature, what happens to the solubility of solute in solution?

The abiotic factors of an environment consists of

Justify the statement s that natural fibres are better than synthetic fibres

Which is the most common method used in laboratory where heat is used to remove liquid, leaving the product dry?

When a bowl of an ice-cream is exposed to sun rays, it will _______.

____________ is vital for bodily functions such as regulation of temperature, nutrient uptake, removing wastes, body weight, and health.

________ is the natural fibre obtained from coconut husk.

A change is always good. State true or false

Question 3 (a)

Fill in the blanks:
Plant fibres are obtained from ___ and ___ .

If we burn a candle what changes is occur around us?

Deborah takes a candle and places it in a tub. She lights the candle and fills the tub with some water. Then she covers the candle with an inverted glass. What happens after some time?

Rayon is called as ______.

Proteins are not only present in food we eat, but also in some fabrics. Which of the following are also made of protein?

Among the gases present in air, which one supports combustion?

The movement of air is caused due to_________ difference.

Cutting of wooden logs into small pieces is a:-

Question 16

Which among the following materials would you identify as soft materials and why ?

Ice, rubber band, leaf, eraser, pencil, pearl, a piece of wooden board, cooked rice, pulses and fresh chapati.

Where was cotton first grown?

Does wood sink in water?

Name a method to separate copper sulphate from water

The thread of a fabric is also known as:

What is the chemical name of the compound $FeC{l}_3$?

The property of bodies to resist a change in their state of rest or of motion is known as

Atomicity refers to the sum total of ____ present in a molecule.

Rocks formed from the sediments of animals are termed as ___ .

The process in which two yarns are arranged together in a certain way to form a fabric is called as:

Question 7

Clouds are

(a) tiny drops of water floating in air
(b) mixture of dust and water vapour
(c) particles of water vapour
(d) rain drops in air

Which of the following is the purest water?

You are provided with solution of substance X . How will you test whether it is saturated or unsaturated with respect to X at a given temperature ? What happen when a hot saturated solution is allowed to cool ?

Match the following:

$\begin{array}{cccc}\text{(i)}& \text{Oxygen}& \text{(A)}& \text{Metal}\\ \text{(ii)}& \text{Sodium}& \text{(B)}& \text{Metalloid}\\ \text{(iii)}& \text{2ex Boron}& \text{(C)}& \text{Non-metal}\\ \text{(iv)}& \text{Gold}& & \\ \text{(v)}& \text{Carbon dioxide}& & \end{array}$

The correct pairs are:-

Below mentioned is the technique used to separate butter from curd. What is this technique called as?

Question 18

Change of a bud into a flower is a change which cannot be reversed. Give four more such example.