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
katovenus [111]
2 years ago
7

1. Distinguish between physical and chemical changes. Include examples in your explanations.

Biology
2 answers:
Rashid [163]2 years ago
8 0

Answer:

Physical change

Any change to the physical properties of a substance is called a physical change.

Physical changes are usually reversible as no new substance is formed. It is the same substance but with changed physical properties.

Chemical change

A change in which one or more new substances are formed is called as a chemical change.

Usually a chemical change involves a chemical reaction, which forms new products.

Example : Rusting of Iron, or burning wood.

Explanation:

have a good day <3 sorry i could answer q1 only ill think baout the others..

777dan777 [17]2 years ago
7 0

Answer:

A physical change is one in which altering the substance doesn’t change its composition. In other words, this is a change in the form of a substance without the production of a new substance. Physical changes can include breaking up the substance into smaller pieces or altering its state of matter.

A chemical change does involve a change in the substance’s composition. Here the change in the composition of a given substance causes a new substance to be produced in place of the original substance. Burning a match is an example of a chemical change.

Elements, which are listed in the periodic table of elements, are substances that can’t be broken down any further by ordinary types of chemical change.

Compounds consist of two or more elements that are combined chemically in such a way that the elements themselves can no longer be identified by their individual properties.

Mixtures consist of two elements mingled together without combining chemically. The individual properties of each material are maintained.

 Shape Volume

Solid Definite (holds shape) Definite (fixed volume)

Liquid No definite shape (takes the shape of the container)  Definite (fixed volume)  

Gas No definite shape (takes the shape of the container)   No definite volume (takes the volume of the container, but will expand indefinitely if not contained)

Atomic mass is generally equal to the sum of the number of protons plus the number of neutrons in an atom. This can be found in reference charts and on the periodic table, typically below the element’s chemical symbol.

Molecular mass is found by adding up all of the atomic masses of all of the individual atoms in one molecule of a compound.

 Location Charge

Proton nucleus  positive

Neutron nucleus  no charge (neutral)

Electron shells (orbitals) surrounding the nucleus  negative

Dalton’s atomic theory makes the following assumptions:

All matter consists of small particles called atoms.

All atoms of the same element are alike in size, shape, and weight, but differ in these properties from the atoms of the other elements.

Chemical reactions take place between atoms, and even in the most violent chemical reactions, the atoms don’t break into pieces.

Atoms combine with other atoms to form molecules.

Explanation:

You might be interested in
How many kingdoms are in the domain becteria?
Klio2033 [76]
There is five kingdoms
4 0
3 years ago
How do decaying leaves affect rocks
Verizon [17]
<span>Acids will break down the rocks, as the acids goes deep in the rocks cracks can form. When the cracks get to large the rock can break apart.</span>
3 0
3 years ago
What is the mantle of the core of the earth
densk [106]

Answer:

Mantle is the interior solid part of the earth which is present between the earth crust and central core.

Explanation:

There are four layers of the earth i. e. earth crust, Mantle, outer core and inner core. Plants are grown on the earth crust. Mantle is the second layer of earth. The thickess of Mantle is about 2900 kilometers. It occupies more than 84 % of the total volume of the earth.

5 0
3 years ago
Read 2 more answers
I need to know everything about reproduction and variation for a test. YEAR 9
patriot [66]
You could’ve attached a question or a picture or something
7 0
3 years ago
Read 2 more answers
Which describes how a turbine works to produce energy for electricity? A. The turbine collects wind energy to make electricity d
vovikov84 [41]

Answer:

the answer is A.

Explanation:

6 0
3 years ago
Other questions:
  • Where does your body get energy after you run out of carbohydrates
    8·1 answer
  • In the mid-19th century, symptoms of fatigue, vague aches and pains, low-grade fever, and lack of energy were attributed to a di
    10·1 answer
  • A population of mice occupies a tree stump in a forest. During the last decade, there has been little change in the number of mi
    15·2 answers
  • A sperm cell fertilizes an egg cell, as shown below. This process plays a vital role in
    9·1 answer
  • Blank are negatively charged and move around the nucleus of an atom
    9·2 answers
  • Which event is an example of a living thing responding to a stimulus?
    13·1 answer
  • Select the correct answer. How does the <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b7e4f2e3fef7dfd
    10·1 answer
  • Which of the following statements regarding biopolymers is false?
    15·1 answer
  • Help is this co-dominance or incomplete dominance?​
    8·1 answer
  • What does the term temperature control refer to
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!