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A Complete Guide-Introduction to Matter,
Elements, and Atoms
Fundamental Science

Grades 7-9 Students

Author: MD Showket Hasan
SMBP (Science Math Bilingual Program), Chalermkwansatree School, 28, Phutthabucha
Road, Nai Mueang, Mueang Phitsanulok District, Phitsanulok, 65000, Thailand
https://orcid
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The learning content provides a comprehensive introduction
to the topic and is perfect for students in grades 7-9
...
The quiz
is a great tool to test your knowledge and ensure that you've fully grasped the material
...

The note covers everything you need to know about matter, elements, and atoms, from
their basic properties to their applications in real-world scenarios
...
The interactive worksheet is designed to be fun and engaging, with interactive
exercises to help reinforce your knowledge
...

So, whether you're a student looking to boost your grades, a science enthusiast looking
to expand your knowledge, or just someone curious about the world around you, my student
note is the perfect resource for you
...
Buy my student note now and start your journey
towards mastering matter, elements, and atoms!

Tags: Matter, Elements, Atoms, Chemistry, Science, Education, Middle School
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Learning
Objectives

1
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2 Applying, and
1
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Learning content

2
...
1
...
2 Elements
2
...
1 Definition of elements
2
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2 Common elements in the
universe and on Earth
2
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3 Atomic number and atomic
mass
2
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4 Isotopes
2
...
3
...
3
...
3
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4 The Periodic Table
2
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1 Organization of the periodic
table
2
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2 Properties and trends of
elements
2
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5
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5
...
5
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6 Conclusion
2
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1 Summary of the key
concepts
2
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2 Applications of knowledge
about matter, elements, and atoms

5-13

3
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Quiz

5
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What do we learn from the topic?
1
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● Define elements and identify common elements in the universe and on Earth
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● Explain how the number of subatomic particles determines the identity of an
element
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2 Applying:
● Use the periodic table to identify the properties and trends of different elements
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● Explain how atoms combine to form molecules and compounds
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3 Creating:
● Develop hypotheses about the properties of new elements based on their position
in the periodic table
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● Create models to illustrate the structure of an atom and its subatomic particles
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These learning goals are meant to help students understand the basic ideas of matter,
elements, and atoms, use their knowledge to predict how elements will behave, and make
their own models and experiments to learn more about these ideas
...
Introduction to Matter, Elements, and Atoms
Imagine you're sitting in your classroom right now, surrounded by your classmates and
your teacher
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But have you ever wondered what matter really is, and how it comes in so many
different forms? Let's find out together!

2
...
It's the desk
you're sitting at, the air you're breathing, and the food you had for breakfast
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Atoms are like building blocks that come together
to make up everything we see, touch, and feel
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1
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Solid matter, like a pencil or a book, has a fixed shape and volume because
the atoms are packed tightly together
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And gaseous matter, like
the air we breathe, has no fixed shape or volume because the atoms are spread out and move
freely
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States of Matter: Solid, Liquid, and Gas [Source: please click here]
Page 5

A Complete Guide-Introduction to Matter, Elements, and Atoms:Fundamental Science, Grades 7-9 Students

Understanding matter and its different forms is like discovering a superpower - it helps
you understand the world around you in a new way
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2 Elements
Imagine you're a detective and you're trying to solve a mystery
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Let's investigate the world of
elements together!

2
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1 Definition of elements
Elements are pure substances made up of only one type of atom
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There are 118 known elements in the
universe, but only a few of them are common on Earth
...
2
...
These two
elements make up almost all of the matter in the universe! But on Earth, the most common
elements are different
...
You've probably heard of some of these elements
before!

2
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3 Atomic number and atomic mass
Each element has a unique number of protons in its nucleus, called the atomic number
...
For example, all atoms with six protons
are carbon atoms
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Figure 2
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2
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Isotopes have the same number of protons but different mass
numbers
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Figure 3
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Continuously exploring this fascinating subject might lead you to unveil new and exciting
discoveries
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3 Atoms
Now that we know about elements, let's zoom in and take a closer look at atoms - the
tiny building blocks of matter
...
3
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Protons
and neutrons are found in the nucleus at the center of the atom, while electrons orbit around
the nucleus in electron shells
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Figure 4
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3
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The number of protons and electrons in an atom is usually the
same, making the atom neutral overall
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2
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3 Electron shells
Electrons orbit the nucleus in electron shells, which are like energy levels
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Electrons in the outermost shell are called valence electrons, and they are
involved in chemical reactions
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Bohr’s Model of an atom showing energy shells [Source: please click here]
Studying atoms is like finding a tiny world inside of everything we see
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4 The Periodic Table
Imagine you're a scientist on a mission to uncover the secrets of the elements
...


2
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1 Organization of the periodic table
The periodic table is a chart that organizes the elements by their properties and trends
...
The elements
are arranged in rows and columns based on their atomic structure and properties
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Periodic Table of Elements [Source: please click here]

2
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2 Properties and trends of elements
The periodic table can help us predict the properties and behavior of different elements
...
For example,
the elements in Group 1 (the alkali metals) are very reactive and easily lose one electron to
form a positive ion
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For example, the
elements in the upper right corner are nonmetals and have low melting and boiling points,
while the elements in the lower left corner are metals and have high melting and boiling
points
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Keep exploring, and you never know what new findings you might
come across!

2
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Molecules and Compounds
Imagine you're a magician, creating new things out of thin air
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2
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1 Definition of a molecule
A molecule is a group of two or more atoms that are bonded together
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Molecules can be solids, liquids, or gases
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Basic structure of a molecule and a compound [Source: please click here ]

2
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2 Formation of compounds
When two or more different types of atoms bond together, they form compounds
...
For

Page 11

A Complete Guide-Introduction to Matter, Elements, and Atoms:Fundamental Science, Grades 7-9 Students

example, table salt is made of sodium and chlorine, which are both very reactive elements,
but table salt itself is stable and safe to eat
...
5
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For example, when you light a candle, the wax melts and reacts with oxygen in
the air to form water vapor and carbon dioxide
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If we keep studying, we might discover even more amazing things about how
matter works!

2
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2
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1 Summary of key concepts
Matter is everything around us that has mass and takes up space
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Elements are pure substances made up of
only one type of atom, and there are 118 known elements in the universe
...
The periodic
table organizes the elements based on their properties and trends
...


2
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2 Applications of knowledge about matter, elements, and
atoms
Understanding matter, elements, and atoms can help us in so many ways! For example,
it can help us understand how different materials work and interact with each other, such as in
cooking or construction
...
Additionally,

Page 12

A Complete Guide-Introduction to Matter, Elements, and Atoms:Fundamental Science, Grades 7-9 Students

knowledge of matter, elements, and atoms is essential for careers in fields such as chemistry,
physics, engineering, and medicine
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Keep exploring and learning, and you
never know what new discoveries and inventions you could bring to the world!

Part 3
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Use the information from the lecture
note to guide your answers
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What is matter?
A
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The energy that makes up the universe
C
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None of the above
2
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Solid, liquid, and gas
B
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Solid, gas, and ether
D
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What are elements?
A
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Compounds made of two or more types of atoms
C
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None of the above

Page 13

A Complete Guide-Introduction to Matter, Elements, and Atoms:Fundamental Science, Grades 7-9 Students

4
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A chart that organizes the elements based on their properties and trends
B
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A chart that organizes the elements based on their location in the universe
D
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What are molecules and compounds?
A
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Pure substances made up of only one type of atom
C
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None of the above

Part 2: Applying (5 points)
6
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7
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8
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9
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10
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Part 3: Short Questions (5 points)
11
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Answer:
…………………………………………………………………………………………
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What is the difference between an element and a compound?
Answer:
…………………………………………………………………………………………
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What are valence electrons?
Answer:
…………………………………………………………………………………………
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How do chemical reactions occur?
Answer:
…………………………………………………………………………………………
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What are some practical applications of understanding matter, elements, and atoms?
Answer:
…………………………………………………………………………………………
...
A
2
...
A
4
...
A

Part 2:
6
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Oxygen, Silicon, Aluminum, Iron, Calcium, Sodium, and Potassium
8
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Atoms
10
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Atoms are made up of three types of particles: protons and neutrons in the
nucleus, and electrons orbiting around the nucleus in electron shells
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An element is a pure substance made up of only one type of atom, while a
compound is a substance made of two or more different types of atoms
...
Valence electrons are electrons in the outermost shell of an atom that are
involved in chemical reactions
...
Chemical reactions occur when atoms or molecules come together and form
new substances
...
Understanding matter, elements, and atoms can have practical applications in
fields such as chemistry, physics, engineering, and medicine
...
Knowledge of matter, elements, and atoms is essential for careers in
these fields and can also help us make informed decisions about important
issues like environmental pollution, climate change, and energy use
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Page 16

A Complete Guide-Introduction to Matter, Elements, and Atoms:Fundamental Science, Grades 7-9 Students

Part 4
...
What is matter?
a
...

b
...

c
...

d
...

2
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Solid, Liquid, Gas
b
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Gas, Liquid, Plasma
d
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What is an element?
a
...

b
...

c
...

d
...

4
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The number of protons in an atom
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The number of electrons in an atom
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The number of neutrons in an atom
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The total number of subatomic particles in an atom
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Which elements are the most common in the universe?
a
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Oxygen and Carbon
c
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Sodium and Potassium
6
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Atoms of the same element with different numbers of neutrons
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Atoms of different elements with the same number of protons
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Atoms of the same element with different numbers of protons
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Atoms of different elements with different numbers of protons
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What is the basic structure of an atom?
a
...

b
...

c
...

d
...

8
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A chart that organizes the elements by their properties and trends
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A chart that organizes the elements alphabetically
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A chart that organizes the elements by their mass
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A chart that organizes the elements by their size
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What are valence electrons?
a
...

b
...

c
...

d
...

10
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A substance made up of two or more different types of atoms
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A substance made up of only one type of atom
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A substance made up of only two types of atoms
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A substance made up of only three types of atoms
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The most common elements on Earth are hydrogen and helium
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True
b
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All atoms of the same element have the same number of neutrons
...
True
b
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Electrons orbit the nucleus in energy shells
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True
b
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The periodic table organizes elements by their size
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True
b
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Compounds are made up of only one type of atom
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True
b
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Match the following elements with their respective chemical symbols:
a) Hydrogen

i) Ca

b) Carbon

ii) O

c) Oxygen

iii) H

d) Calcium

iv) C

17
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Match the following subatomic particles with their descriptions:
a) Proton

i) Positively charged

b) Neutron

ii) No charge

c) Electron

iii) Negatively charged

19
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Match the following elements with their respective common uses:
a) Sodium

i) Strong and lightweight metal used in construction

b) Chlorine

ii) Used in bleach and disinfectants

c) Carbon

iii) Used in pencils and diamonds

d) Silicon

iv) Used in computer chips and solar panels

Page 19

A Complete Guide-Introduction to Matter, Elements, and Atoms:Fundamental Science, Grades 7-9 Students

Answer Key:
1
...


c

3
...


c

5
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True

7
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False

9
...


True

11
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c

13
...


d

15
...


16
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a-iii, b-i, c-ii

18
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a-ii, b-i, c-iii

20
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Great job completing the interactive worksheet and taking the quiz!
Here's how you'll be graded:
Interactive worksheet: 15 marks
● Completion of all sections: 5 marks (You can do it!)
● Understanding: 5 marks (You've got this!)
● Applying: 3 marks (Put your knowledge into action!)
● Creating: 2 marks (Get creative!)

Quiz: 20 marks
● Understanding: 10 marks (You understand the concepts!)
● Applying: 5 marks (You can apply your knowledge!)
● Matching: 5 marks (You can make connections!)

Total: 35 marks
Grading scale:
● 0-14: Needs improvement (Don't worry, keep practicing!)
● 15-24: Satisfactory (Great job, keep it up!)
● 25-35: Excellent (Wow, you're a science superstar!)
Remember, the more you practice and apply your knowledge, the better you'll get
...
You've got this!

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