English, asked by karunasagar0339, 3 days ago

Write a short story about a time when you saw matter change size, shape, state, or appearance. Be sure to
name the matter that changed, how it changed, and why it changed.





dont type rubbish

Answers

Answered by sdiya5867
0

Answer:

How Matter Changes By Cindy Grigg

Changes in matter happen around you every day. Some changes make matter look different.

Other changes make one kind of matter become another kind of matter.

When you scrunch a sheet of paper up into a ball, it is still paper. It only changed shape. You

can cut a large, rectangular piece of paper into many small triangles. It changed shape and

size, but it is still paper. These kinds of changes are called physical changes.

Physical changes are changes in the way matter looks. Changes in size and shape, like the

changes in the cut pieces of paper, are physical changes. Physical changes are changes in the

size, shape, state, or appearance of matter.

Another kind of physical change happens when matter changes from one state to another

state. When water freezes and makes ice, it is still water. It has only changed its state of

matter from a liquid to a solid. It has changed its appearance and shape, but it is still water.

You can change the ice back into water by letting it melt. Matter looks different when it

changes states, but it stays the same kind of matter.

Solids like ice can change into liquids. Heat speeds up the moving particles in ice. The

particles move apart. Heat melts ice and changes it to liquid water. Metals can be changed

from a solid to a liquid state also. Metals must be heated to a high temperature to melt.

Melting is changing from a solid state to a liquid state.

Ice melts at 0 degrees Celsius or 32 degrees Fahrenheit. This is the melting point (or

freezing point) of water. If the temperature goes above this temperature, the ice will

melt. Heat speeds up the moving particles in ice. If the temperature goes below this

temperature, water will freeze. At colder temperatures, the moving particles slow

down.

You have probably seen a puddle of water that disappears after a time. The water in

the puddle changed into a gas. Matter evaporates when it changes from a liquid to a

gas. Water in the form of gas is called water vapor.

Water changes quickly into a gas when water is heated to a temperature of 100 degrees

Celsius or 212 degrees Fahrenheit. This temperature is the boiling point of water. Heat

makes water particles move fast.

Cooling air causes water vapor to change to a liquid. Matter condenses when it

changes from a gas to a liquid.

Have you ever had a glass of lemonade with ice on a hot summer day? Did you notice

the water that beaded up on the outside of the glass? The cold glass cooled the air

around it. Then water vapor in the air condensed to small drops of water on the outside

of the glass.

Another way matter can change is a chemical change. A chemical change takes place

when matter changes into a different kind of matter. An example of a chemical change

is burning wood. The wood changes into smoke and ash. This chemical change

produces heat and light.

Have you ever seen a nail or other piece of metal that was rusted? Rusting is a

chemical change, too. The metal in the nails mixes with the air to form a different

kind of matter, rust.

Have you ever seen an old piece of silverware that has turned black? This is another

kind of chemical change. A gas in the air causes a black covering called tarnish to

form on silver. The tarnish is a different kind of matter from the air or the silver.

Signs of a chemical change are a change in color or temperature or the production of

heat or light. Bubbling, fizzing, or making a noise or smell are some more signs. Not

all of these things happen during a chemical change. But usually at least one of them

does happen.

Changes in the way matter looks are physical changes. A physical change happens

when matter changes from one state into another. A chemical change takes place when

matter changes to a different kind of matter.

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