1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
julia-pushkina [17]
3 years ago
10

Methods scientists use to determine if a change was physical or chemical.

Chemistry
2 answers:
Tpy6a [65]3 years ago
7 0
Chemical reactions can be identified when there is a change in color, energy is produced, change in odor, or if new substance forms.
alukav5142 [94]3 years ago
5 0
Chemical change can be determine by
change in color
energy
change in odor
rusting metal
wood burning
Physical change can be determine by
Ripping of paper
Sharpening of a pencil
Boiling of water
Melting an ice cube
Braking of glass

hope it helps



You might be interested in
2 QUESTIONS: ANSWER THIS with a proper answer plz. PLZ DO NOT ANSWER JUST FOR MY BRAINLY POINTS!!!!
leonid [27]

Answer:

Si hay algo que sucedió entre ustedes raro o un comportamiento que tuviste con esa persona o que te vio hacer asi como le pudieron decir algo de ti que no le gustara a tu amigo hace que se comporte raro contigo

Explanation:

3 0
3 years ago
When ionic compounds are added to water, they dissociate or break apart into ions. In the case of table salt, salt added to wate
Lostsunrise [7]

Answer:

b dissociate

Explanation:

5 0
3 years ago
Please help with this , thanks you guys very much
ahrayia [7]

Answer:

<em>I</em><em> </em><em>am</em><em> </em><em>giving</em><em> </em><em>u</em><em> </em><em>some</em><em> </em><em>explanation</em><em> </em><em>related</em><em> </em><em>this</em><em> </em><em>question</em><em> </em><em>pls</em><em> </em><em>see</em><em> </em><em>that</em><em> </em>

<em>it</em><em> </em><em>may</em><em> </em><em>help</em><em> </em><em>u</em>

Explanation:

The pH scale measures how acidic an object is. Objects that are not very acidic are called basic. The scale has values ranging from zero (the most acidic) to 14 (the most basic). As you can see from the pH scale above, pure water has a pH value of 7. This value is considered neutral—neither acidic or basic. Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much more acidic. Typical acid rain has a pH value of 4.0. A decrease in pH values from 5.0 to 4.0 means that the acidity is 10 times greater.

How pH is Measured

There are many high-tech devices that are used to measure pH in laboratories. One easy way that you can measure pH is with a strip of litmus paper. When you touch a strip of litmus paper to something, the paper changes color depending on whether the substance is acidic or basic. If the paper turns red, the substance is acidic, and if it turns blue, the substance is basic

4 0
3 years ago
Which of the following characteristics describe a paramecium
marishachu [46]

Answer:

i think it's a (not sure)

7 0
3 years ago
Need help with the balancing one
DochEvi [55]
The third option, 2,2,1,2
8 0
3 years ago
Other questions:
  • how many milliliters of 1.50 m hno3 contain enough nitric acid to dissolve an old copper penny with a mass of 3.94 g?
    12·1 answer
  • The continents may not have drifted slowly into their present positions. True False
    10·2 answers
  • Charged atoms that form molecules are held together by _______. charged atoms that form molecules are held together by _______.
    10·1 answer
  • The pauli exclusion principle states that no ____ electrons within an atom can have the same ____ quantum numbers.
    7·1 answer
  • What are atoms made of
    13·1 answer
  • Which of the following gases is the heaviest? O2, CH4, CO2, Cl2 O2 CH4 CO2 Cl2
    15·2 answers
  • Calculate the following:
    6·1 answer
  • What geologic features might form in convergent boundaries<br>Pls help
    7·1 answer
  • If you have 2.0 moles of sodium chloride (NaCl), what is its mass in grams?
    8·1 answer
  • UHHH helpppp maya cause uh she d.a.n.g d.u.m.b.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!