General Question

biancasager's avatar

Give me 5 examples of physical change & chemical change?

Asked by biancasager (4 points ) November 17th, 2008

i dont know da answer

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16 Answers

krose1223's avatar

If I remember correctly chemical change- bubbles, smell, color, temperature, light emitted, taste… I think there are more.

Physical… Seems kind of obvious.

Try reading your book instead of asking Fluther to help you with your homework.

asmonet's avatar

Look in the back of the book, you might have to open it first though.

Just a thought.

joeysefika's avatar

After 30 seconds of googling I found this

Physical Changes
Change of state (such as from solid to liquid or from gas to liquid)
Specific examples of state change include water freezing, alcohol evaporating and dry ice (solid carbon dioxide) subliming
Absorption of water into a towel
Crumpling a piece of paper
Pulling copper into a thin wire – a change of shape, but not a change of composition
Cutting a material such as wood
Ripping a piece of tin foil
Breaking glass
Deflating a basketball
Mixing different solids (such as solid sulfur and iron filings)
Inflating a volleyball

Chemical Changes

Burning a log of wood.
Mixing an acid with a base, producing water and a salt.
Photosynthesis – a process in which carbon dioxide and water are changed into sugars by plants.
Cracking heavy hydrocarbons to create lighter hydrocarbons (part of the process of refining oil).
cooking examples:popcorn cake & eggs
oxidation examples:rust or tarnishing
The following can indicate that a chemical change took place, although this evidence is not conclusive:
Change of color (for example, silver to reddish-brown when iron rusts).
Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat.
Change of form (for example, burning paper).
Light, heat, or sound is given off.
Formation of gases, often appearing as bubbles.
Formation of precipitate (insoluble particles).
The decomposition of organic matter (for example, rotting food).

(Google is your friend)

asmonet's avatar

Bad Joey! No! Don’t do that anymore.
I smack you with a rolled up newspaper on the nose.

joeysefika's avatar

I’m sorry, I’m sorry, but stupid, obvious questions just need answering

asmonet's avatar

boo. :)

joeysefika's avatar

my bad
Oh, and welcome to Fluther :D

MacBean's avatar

I did my homework already. I don’t want to do yours, too.

joeysefika's avatar

I have a science exam on wednesday :(

damien's avatar

Physical Change: Michael Jackson
Chemical Change: Ozzy Ozbourne

It’s not ‘da’ answer, but it is an answer

steve6's avatar

Ph. cut paper, break rock, break wood, wear on coin, wind erosion. Ch. digestion, rust, cell growth, pain, mixing epoxies.

asmonet's avatar

Damn it, Steve!

augustlan's avatar

Might want to take a peek at your English book, while you’re at it.

joybanquil's avatar

Physical Change

1.breaking glass
2.smashing car
3.crumpling of piece of paper
4.Cloud forming in the sky
5.Absorption of water into a towel
6.Tearing a piece of tin foil
7.Cutting a material such as wood
8.Pulling copper into a thin wire – a change of shape, but not a change of composition
9.Mixing different solids (such as solid sulfur and iron filings)
10.Deflating a basketball

joybanquil's avatar

Chemical change
1.Burning a log of wood
2.Mixing an acid with a base, producing water and a salt.
3.Photosynthesis – a process in which carbon dioxide and water are changed into sugars by plants.
4.Cracking heavy hydrocarbons to create lighter hydrocarbons (part of the process of refining oil).
5.Cooking examples: popcorn, cake, pancakes, and eggs
6.Oxidation examples: rust or tarnishing
7.Combustion
8.Mixing chemicals
9.Explosion of fireworks
10.Burning a magnesium strip.

hanna1234's avatar

thxs joybanquil for helping me

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