Question

FANS & MEDALS
Which of the following is an example of a chemical change?
A. A mixture of flour, sugar, eggs, and butter is baked to become a cake.

B. Chocolate squares are melted to make cake icing.

C. Flour and sugar are sifted together into a measuring cup.

D. The shell of an egg breaks when it is struck against a hard surface.

Answer 1

@TQKMB
@MissKitty777

Answer 2

B

Answer 3

All matter is made up of very tiny particles called atoms. Atoms are
A. always in motion.
B. the smallest part of a mixture that has properties of that mixture.
C. different in the same element.
D. unable to be divided into smaller particles.

Answer 4

B

Answer 5

Volume is a _______ property. Flammability is a _______ property.
A. chemical; physical
B. physical; chemical
C. chemical; chemical
D. physical; physical

Answer 6

B

Answer 7

All atoms of the same element have the same number of ___________, which is called the atomic number.
A. electrons
B. protons and neutrons
C. protons
D. neutrons

Answer 8

@LOLAri @TQKMB
The answer to the first question is NOT B

@LOLAri You cannot trust answers which just give 'a letter' you must chack and understand the answer.

You therefore cannot triust @TQKMB answer to the second one either

Answer 9

In fact the answer to the second one is not B either - I think you need a better mentor than @TQKMB

Answer 10

ok??

Answer 11

and i think this is wrong subject, there is chemistry subject you can post this sort of questions...

Answer 12

@MrNood if you think my answers are wrong. Fine. Do you have a reason on why my answers are wrong, and what do you think the answers are?
BTW @MrNood I'm doing the best I can with the knowledge I can. I'm only a high school student myself, some of this stuff I learned in my Chemistry class this year so it's fresh in my mind. I may be wrong so be it. I just told her what I think the answer is I never said this is the answer. If you think @LOLAri needs a better mentor you try helping her out then. I like to here what you think the answers are and some proof behind your answers.

Answer 13

Which of the following is an example of a chemical change?
A. A mixture of flour, sugar, eggs, and butter is baked to become a cake.
because all other are phisical change even melting of chocolate is a phase change from solid to liquid, whereas baking is followed by all sorts of chemical changes ex. egg proteins get denaturated...

Answer 14

All matter is made up of very tiny particles called atoms. Atoms are
A. always in motion.

Answer 15

Volume is a _______ property. Flammability is a _______ property.
B. physical; chemical

Answer 16

All atoms of the same element have the same number of ___________, which is called the atomic number.
C. protons
while neutrons can differ and then that are called isotopes

Answer 17

@TQkmb
When you just give an letter - e.g. 'B' as an answer there are 2 issues:
First it is not allowed by the Code of conduct of the site
Second it does not give the original poster any guidance or help towards understanding the subject and does not give them any means to evaluate your answer.

The lazier students will take such answers without analysis, and in many case the answers are wrong - so they are doubly compromised - a wrong answer and no understanding.
More engaged students will need to get more information before they can use an answer such as 'B' and hence you have not really helped. If your answer is right - then you have merely illustrated that YOU know the answer, if wrong then you have done the OP a disservice.

It is good that you are involved and willing to help, but it is better to discuss your answer and give reasons why you chose the one oyu did.

As for the above:
Chocolate melts into liquid chocolate - but is STILL chocolate. Therefore no CHEMICAL change has occurred. (In the same way as ice melts but is still water). This is a physical change known as a change of 'phase'. (phase changes are typically one af 3 types - change of crystal structure, melting, and boiling).
Mixing substance such as flour and sugar does not cause a reaction between them - each component remains chemically the same.
Breaking an egg is evidently a physical change.
However when you BAKE a cake, the components combine and change into DIFFERENT chemical substance, which do not naturally return to there original state. THIS is a chemical change.

Atoms are:
A molecule is the smallest component of a product that retains its properties.
All atoms of the same substance are the same
We know that atoms CAN be divided into smaller particles - protons, neutrons and electrons being the starting point...

Hence the answer remaining is
always in motion -

Answer 18

OOOPS typo
I meant 'their original state' above (not 'there')