Chemistry Review
Presentation
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Easy
•
NGSS
MS-PS1-1, MS-PS1-4, MS-ESS1-1
+13
Standards-aligned
Amanda Greeves
Used 3+ times
FREE Resource
4 Slides • 17 Questions
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Chemistry Review
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Stevie is writing an essay for her chemistry class, but she seems to be missing some information. Help Stevie complete her essay by filling in the missing information!
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Exploring the Magical World of Atoms and Molecules: A Fun Adventure in Chemistry
By Stevie James
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Drag and Drop
Introduction:
Welcome, young scientists, to the amazing world of
Welcome, young scientists, to the amazing world of
! Today, we're embarking on an exciting journey to discover the
blocks of everything around us –
and molecules. Get ready to dive into the tiny, yet fascinating
that makes up our world!
Drag these tiles and drop them in the correct blank above
atoms
chemistry
building
universe
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Atomic Structure:
Let's start by zooming in, way in, to the smallest particles of
Let's start by zooming in, way in, to the smallest particles of
– atoms! Picture atoms as tiny, busy solar systems, with a
at the center and
zooming around like planets. The nucleus is made up of even tinier particles called
and neutrons, while the electrons whirl around in energy levels or
.
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matter
nucleus
electrons
protons
shells
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Subatomic Particles:
Now, let's meet the stars of our atomic show – the
Now, let's meet the stars of our atomic show – the
particles! Protons carry a
charge,
have no charge (they're neutral), and
are negatively charged. These tiny particles work together to give each atom its unique
.
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subatomic
positive
neutrons
electrons
properties
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Molecules, Compounds, and Elements:
Atoms are like LEGO blocks, and when they join together, they form
Atoms are like LEGO blocks, and when they join together, they form
. If the molecules are made of just one
of atom, we call them
. But if different types of atoms come together, they create
. For example, water is a compound made of two
atoms and one oxygen atom.
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molecules
type
elements
compounds
hydrogen
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Atomic Number, Atomic Mass, and Element Symbol:
Every atom is like a secret agent with its own ID card. The atomic
Every atom is like a secret agent with its own ID card. The atomic
tells us the number of
in an atom's
, while the atomic
is the total number of protons and neutrons. Each element has its own
, like "H" for hydrogen and "O" for oxygen, making it easier for scientists to communicate about them.
Drag these tiles and drop them in the correct blank above
number
protons
nucleus
mass
symbol
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The Periodic Table of Elements:
Imagine a big family reunion where all the elements gather together – that's the
Imagine a big family reunion where all the elements gather together – that's the
! It's like a giant puzzle, organizing
based on their
. You can find metals, nonmetals, and metalloids, all neatly arranged in rows called
and columns called
.
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elements
properties
periods
groups
periodic table
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Atomic Behavior:
Atoms are like tiny magnets, with
Atoms are like tiny magnets, with
protons attracting
electrons. This attraction keeps the electrons buzzing around the nucleus. But atoms are also like social butterflies – they love to share or steal electrons to become
. This behavior determines how atoms interact with each other and form
.
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positive
negative
stable
compounds
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Positive or Negative
An atom usually has a
An atom usually has a
charge because the number of
equals the number of electrons. So the atom has a balanced number of protons and electrons, canceling out each other's charges and resulting in a charge of zero. But sometimes, an atom
one or more electrons, leaving it with more protons than
. This imbalance gives the atom a
charge, turning it into a positive ion.
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neutral
protons
loses
electrons
positive
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Reactants and Products in a Chemical Equation:
Chemical reactions are like magical transformations where reactants turn into products. A chemical equation is like a
, showing us what
(reactants) are needed and what
(products) are formed. For example, when hydrogen gas reacts with
gas, they produce
!
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recipe
ingredients
new substances
water
oxygen
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Chemical Change vs. Physical Change:
Imagine baking a cake – mixing
, baking in the oven, and voila! You have a delicious treat.
changes are like baking a cake –
are formed, and it's hard to go back to the original ingredients. Physical changes, on the other hand, are like
– the substance changes form, but its identity remains
.
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new substances
melting ice
the same
ingredients
Chemical
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Synthetic Materials in Chemistry:
Chemistry isn't just about natural substances – we can also create
materials! From plastics to medicines, synthetic materials are made through
reactions in labs. It's like playing mad scientist and inventing new stuff!
is the most widely used synthetic material in the world but also one of the most environmentally
. Its manufacture alone is responsible for about 5% of global
(CO2) emissions.
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synthetic
chemical
Concrete
unfriendly
carbon dioxide
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The numbers placed in
of formulas to balance equations are called
, and they multiply all the atoms in a
. Thus, the symbol “2NaHCO₃” indicates
units of sodium bicarbonate, which contain 2 Na atoms, 2 H atoms, 2 C atoms, and 6 O atoms (2 X 3= 6, the coefficient times the subscript for O).
Drag these tiles and drop them in the correct blank above
front
coefficients
two
formula
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Particle Motion When Energy is Added or Removed:
Picture atoms as tiny dancers at a party – when we
Picture atoms as tiny dancers at a party – when we
energy (like heat), they start moving
and bumping into each other. This can lead to changes in
, like melting or boiling.
energy (cooling things down)
the dance, causing freezing or condensation.
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add
faster
state
Removing
slows down
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The Driving Force Behind Matter Changing State:
is like the DJ at the atomic dance party – it controls the energy level of the atoms. When temperature rises, atoms
energy and change
, like melting from a solid to a liquid. When temperature
, atoms lose energy and
or condense.
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Temperature
gain
state
drops
solidify
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Exothermic and Endothermic Reactions:
Chemical reactions can
or absorb energy.
reactions give off
or light, like a cozy fire warming us up.
reactions absorb energy, making things feel colder, like an ice pack cooling a bruise. However, baking a cake is also considered endothermic because it involves the
of heat from the oven.
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release
Exothermic
Endothermic
heat
absorption
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Thermal Energy Applied to Chemistry:
Thermal energy is directly related to the motion of particles in a substance. The
Thermal energy is directly related to the motion of particles in a substance. The
the particles move, the more thermal energy they have. This is because thermal energy is the total kinetic energy of all particles in a substance. So, when the particles move faster, they have more kinetic
, which increases the
energy. Conversely, if the particles
, they have
kinetic energy and the thermal energy decreases.
Drag these tiles and drop them in the correct blank above
faster
energy
thermal
slow down
less
20
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Thermal Energy Applied to Chemistry:
Thermal energy is directly related to the motion of particles in a substance. The
Thermal energy is directly related to the motion of particles in a substance. The
the particles move, the more thermal energy they have. This is because thermal energy is the total kinetic energy of all particles in a substance. So, when the particles move faster, they have more kinetic
, which increases the
energy. Conversely, if the particles
, they have
kinetic energy and the thermal energy decreases.
Drag these tiles and drop them in the correct blank above
faster
energy
thermal
slow down
less
21
Conclusion:
Congratulations, young scientists, you've just unlocked the secrets of the atomic world! From the tiniest particles to the grand periodic table, chemistry is all around us, shaping the world we live in. So keep exploring, keep experimenting, and who knows – maybe you'll discover the next big breakthrough in chemistry!
Chemistry Review
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