Transparency conductivity examples are:

Clear plastic make-up bag, Clear glass vase

Which materials would you use for insulations and why?

Wool, plastics and aluminium, because they can hold in heat.

Can materials be changed?

Some materials can be changed without forming a new substance, whereas some materials can be changed by forming new substances.

What is a reversible change?

It is a change that can be undone or reversed. If you get back the original substances you started the reaction with, the change is reversible. When materials are changed in a reversible way, the materials can change its position, shape, colour, size or state without forming new materials.

What is a irreversible change?

It cannot be changed back to its original form. When materials are changed in an irreversible way, a new substance is formed. Irreversible changes are permanent, they cannot be undone. Example a cake cannot be changed back into flour milk and eggs.

What are the types of changes that can be reversible?

Melting, freezing, evaporating, condensing, dissolving and filtering are all reversible.

What are the types of changes that can be irreversible?

burning, heating, mixing are examples of irreversible changes.

These things are reversible

Melting chocolate, ice cubes, boiling water in a kettle, ironing clothes, inflating a baloon,

These things are irreversible

baking a cake, dissolving sugar in tea, eating a meal, decaying food, fireworks, making a fruit salad, iron fence rusting, breaking a glass, bleached fabric cutting paper into pieces, lighting a match, frying an egg.

Matter has weight and takes up space. Matter is made up of atoms. A state of matter are different forms in which matter can exist. The three states are solid, liquid and gas.

Solids are substances that have a definite volume and a definite shape. the particles in a solid are close together. They are fixed in place but can vibrate when heated.

Liquids have a definite volume but do not have a definite shape. Liquids take on the shape of the container. the particles in a liquid are not fixed in place and can move form one place to another. When particles in a liquid are heated they can move apart.

Gases have no definite volume and not definite shape. The particles in a gas are farther apart than particles in a liquid or solid. Gas particles move easily in any direction to fill the space they are in.

What are the changes in states of matter?

Matter can change from one state to another. When matter changes from one state to another the substance itself does not change. When you put water in a freezer, the water freezes into a solid (ice). When you place an ice cube on a warm plate, the ice melts into liquid water again. If you leave the water in the sun the water will become water vapour (gas) Water, ice and water vapour are different states of water which are made up of the same type of molecules. When a substance changes from one state to another, the molecules in the substnce do not change. However, it is the arrangement of the molecules and the amount of space between them that changes, giving each state of matter itss own characteristics.

Types of changes, solids to liquids?

Solids can become liquids and liquids can become solids. melting is the process by which a solid becomes a liquid. Different solids melt at different temperatures. The lowest temperature at which a substance begins to melt is called its melting point. Freezing is the process by which a liquid becomes a solid. The temperature at which a specific liquid becomes a solid is called the freezing point. Pure water freezes at 0 degrees celcius and 32 degrees F while salt water freezes at a lower temperature.

Types of changes liquids to gases

Evaporation: is a process by which a liquid becomes a gas. Evaporation usually occurs at the surface of a liquid. Example. Water is spilled on a table and the sun is heating it. the water will eventually evaporate. Condensation: it is the process by which a gas changes its state to become a liquid. Example a cold lemonade glass filled with ice. you are outside in the sun and you start to see water droplets on the outside of the glass. The ice evaporates and quickly turns to liquid and forms on the glass.

how water can exist as both a solid and a liquid at 0 degrees celsius

At this temperature, water is in the process of changing from a solid state into the liquid phase or vice versa. Molecules in the liquid phase can lose a bit of energy and solidify whilst solid water (ice) can gain some energy and melt . So both the liquid and solid-state exist at 0-degree Celsius.

Describe 3 ways in which matter can change from one state to another

Melting - changing from solid to liquid. Freezing - changing from a liquid to a solid. Vapourization - changing from liquid to gas.

Describe the movement of particles in a solid, a liquid and gas.

The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them . Solid � In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other.

What is the relationship between the melting point and the freezing point of a substance?

For most substances, the melting point (the temperature at which a solid turns into a liquid) and the freezing point (the temperature at which a liquid turns into a solid) are the same temperature. These two processes occur at the same temperature, but in opposite directions.

compare and contrast the process of evaporation and condensation

Evaporation and condensation are both ways water changes between a liquid and a gas, but they do opposite things! EvaporationCondensationLiquid → Gas (water vapor) Happens when water heats up (even slowly!) Happens when water vapor cools downExample: Puddles drying up in the sun Needs energy (heat) to workReleases energy (heat) as it happensFaster on hot, dry, windy days Gas (water vapor) → Liquid Example: Water droplets on a cold soda canFaster on cold surfaces (like a mirror in a steamy bathroom) Key Difference: Evaporation turns liquid water into invisible gas (like steam from a hot soup). Condensation turns gas back into liquid water (like fog on a window). Fun Fact: Both are part of the water cycle —evaporation helps form clouds, and condensation makes rain!

Where are some likely places at home for condensation to occur?

1. Bathroom Mirror & Windows: After a hot shower, steam hits the cold glass and turns into water droplets. Tiles & Walls: If the bathroom stays steamy, water beads up on cool surfaces. 2. Kitchen Windows: Cooking (like boiling pasta) releases steam that condenses on cooler glass. Cold Drink Cans/Bottles: Water droplets form when warm air hits the cold surface. Lid of a Cooking Pot: Steam from boiling food hits the lid and drips back down.

What evidence is there that condensation is taking place at home?

Foggy mirrors or windows after a hot shower or cooking. Wet rings or puddles near cold surfaces (like windowsills in winter). Sweaty pipes or toilet tanks (when warm, humid air touches cold metal/porcelain). 2. Dampness & Moisture 🌫️ Wet walls or ceilings (especially in basements or bathrooms). Peeling paint or wallpaper (long-term condensation can damage surfaces). Steam from cooking.

Hold a mirror closely to your mouth and gently breathe out onto the mirror. What do you observe? How do you know that there is water vapour in the air you breathe out?

When you breathe out onto a mirror, you'll observe it becoming foggy or moist, indicating the presence of water vapor in your breath, which condenses on the cooler surface of the mirror.

Describe how the molecules in the air behave when you pump air in a bicycle tyre.

When you pump air into a bicycle tire, the air molecules inside the tire are compressed, meaning they are pushed closer together, increasing their pressure and causing the tire to become harder

Can water evaporate from a puddle on a cold day? explain your answer

Yes, water can evaporate from a puddle even on a cold day, though at a slower rate than on a warmer day, because evaporation is a process that occurs at all temperatures, not just when water reaches its boiling point.

If you cut a hole in a football, what happens to the gas inside?

If you cut a hole in a football, the compressed air inside will rapidly escape, undergoing adiabatic expansion, causing a decrease in pressure and temperature.

If you place a rubber ball into a box, why doesn't the ball change it's shape?

The ball is a solid; the molecules are fixed in place and cannot move easily

States of Matter Flashcards

Student preview

38 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is a property of material?

Back

Materials have different properties depending on what they are made and used for. Some materials are hard, soft, opaque, translucent, heavy, light, rough, smooth, shiny or dull

2.

FLASHCARD QUESTION

Front

What are the properties of materials?

Back

TRANSSPARENCY: Can be easily seen through

ABSORBENCY: the material can absorb liquid

STRENGTH: the material is hard to break

FLEXIBILITY: the material can bend without breaking

ELECTRICAL: the material will allow electricity to pass through

HEAT CONDUCTIVITY: The material will allow heat to pass through it

MAGNETIC: The material can attract or repel magnets

3.

FLASHCARD QUESTION

Front

Heat conductivity examples are:

Back

A pot, spoon and a hot cup of tea

4.

FLASHCARD QUESTION

Front

Electrical conductivity examples are:

Back

Electric kettle, microwave, plug chord

5.

FLASHCARD QUESTION

Front

Flexibility conductivity examples are:

Back

Rope, belt

6.

FLASHCARD QUESTION

Front

Absorbency conductivity examples are:

Back

sponge, paper towel

7.

FLASHCARD QUESTION

Front

Strength conductivity examples are:

Back

Machette, brick or block

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