3rd Grade ICSE

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07. Forms Of Matter Solids, Liquids And Gases

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Chapter: 07. Forms Of Matter Solids, Liquids And Gases

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What is matter?

Matter is anything that possesses mass and occupies a certain amount of space.

Name the three main forms of matter.

The three main forms of matter are solids, liquids, and gases.

How does water exemplify the three forms of matter?

Water can be found as solid ice, liquid water, and gaseous steam or water vapour.

State two distinct characteristics of solids.

Solids have a fixed shape and a fixed size, and they do not flow.

In what way do liquids interact with the shape of their container?

Liquids do not have a fixed shape of their own, but they always take on the shape of the container they are poured into.

What unique property do gases have regarding the space they occupy?

Gases do not take up a fixed space and will expand to fill the entire volume of any container they are present in.

Provide an example of a solid and describe its use from the chapter.

An umbrella is a solid that we use to protect ourselves from the rain.

Give an example of a liquid mentioned and explain its importance.

Water is a liquid essential for life, as many plants and animals live in it, and humans must drink plenty of it daily.

Mention a gas discussed in the chapter and its vital function.

Oxygen is a crucial gas that we breathe in to sustain life.

Explain why sand is classified as a solid, even though it can be poured and takes the shape of its container.

Sand is considered a solid because each individual grain of sand has its own fixed shape and size, even though the collection of grains can flow and appear to take the container’s shape.

What did the activity with the pricked balloon demonstrate about air?

The activity showed that air, despite being invisible, possesses mass, as the stick tilted towards the side with the unpricked, inflated balloon.

Why does the smell from incense sticks spread throughout an entire room?

The scent particles from the incense sticks are in gaseous form, and gases have the property of spreading out to fill all available space, causing the smell to diffuse throughout the room.

What is the process called when a substance like naphthalene balls changes directly from a solid to a gas?

The process where a solid changes directly into a gas without first becoming a liquid is called sublimation.

How are medicines an example of matter existing in different forms?

Medicines can be found as solids, such as pills or tablets, and also as liquids, like syrups.

Besides taking the shape of their container, how else do liquids behave regarding their movement and space?

Liquids flow easily and occupy a fixed amount of space.

How do gases differ from solids and liquids in terms of having a fixed shape, fixed size, or occupying a fixed space?

Gases do not have a fixed shape, fixed size, or occupy a fixed space, instead, they spread to fill the entire volume of their container.

What eco-friendly action is suggested after conducting the liquid flow experiment?

It is suggested to use the water from the experiment to water plants instead of discarding it.

Identify the form of matter for ice, liquid water, and steam.

Ice is a solid, liquid water is a liquid, and steam is a gas.

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