Physics_Bookbot_freekidsbooks-2-14

Heat Liquid Matter is all things that take up space, which
includes all liquids, solids, and gases. Energy
What is physics? is something that can be transferred between
matter, like heat. Work happens when energy
is transferred from one bit of matter to
another.

The field of Solid Do you think that light is
physics is about matter or energy?
understanding
matter and Light is a form of energy.
energy and how
they interact.

What is an It is a unit Some of these things,
atom? of matter. like bombs, have
Different elements been destructive.
have atoms with Other research has
different structures. revealed things about
our universe and
Understanding helped us to improve
the structure of technology.
atoms has
helped us to do Which of these are made
amazing things. up of atoms: your bones,
water, our atmosphere?

All of these things are made up of atoms!

Why are By observing time, mass, and
time, mass, distance in physics experiments,
and distance we can calculate the work that is
important in done, the energy that is
transferred, and how it
physics? transforms.

If physics is all about the ways What is the difference if you lift
that matter interacts and how the first ball of Newton’s cradle a
energy transfers between this little or a lot?
matter, we need ways to record
energy transfers and How far you lift the first ball changes the work
transformations. that it can do and the energy that is transferred.
If you lift the ball a little, it gently taps the others.
If you lift it a lot, it sends the end ball flying.

What are Heat and work are Work is all about when
heat and forms of energy something is moved by
work in transfer. force, such as bike
physics? pedals. Heat can be
Heat is transferred from transferred to work,
one bit of matter to and work can be
another, from hot to cold, transferred to heat.
like how you can be warmed
by a hot water bottle. When you rub your
hands together, is heat
causing work or is work
causing heat?

Work is transferring to
heat.

What are Why can some
forces? things float in
water?
They affect objects in different ways, depending on
things like mass. The power of the force also changes Only things with a
the outcome. One very important force is gravity. We mass denser than
track gravity by the mass of something, how it speeds water will have
up as it falls, and how this is different in gravity drag it
other environments. down.

How do
we see
light and
color?

Physics also helps us to understand how light works, Why can’t you
including how we see colors. When we see colors, touch a rainbow?
our eyes are catching different wavelengths of light.
The wavelengths range from short to long. Different It is made up of light reflecting off mist.
objects absorb and reflect different wavelengths, The mist is matter, but the light is not.
and this is why we see things as different colors.

How do It also lets us
we hear understand how sound
sound? affects us, other
animals, and plants.
Just as our eyes pick up wavelengths
of light, our ears pick up waves of How did Beethoven continue to
sound. They start from the vibration compose music after he went deaf?
of an object and are picked up by our
ears. Beethoven worked with vibrations.

Understanding
how sound works
has let us make
different
instruments and
music.

What does physics have to Physics has also been important as we have made
do with computers and computers, video games, and robots. Not only does
other machines? physics explain how technology is powered, an
understanding of it lets us keep improving
our machines.

Knowledge of energy
transfer lets us make
machines that can do
faster and more
complex jobs.

Why do we do physics tests on robots?

We need to see how well a
robot can interact in our world.

What parts of Why is our gravity
physics can be different to other planets
in the Solar System?
explored in
space? The mass of a planet
affects the gravity on it.
Physics doesn’t just apply to our planet,
but to everything in our universe. Physicists
explore changes in gravity, find new planets
by looking at light from stars, and even think
about things that we cannot yet understand -
like black holes and dark matter. There is a lot
of work to do, but it is fascinating.

How can Now that we are running
physics help us out of fossil fuels to make
with power and electricity, physics is also
helping us to find new
energy? ways of making power
with renewables.

Physics also helps us How can you get power
understand how we can from the wind?
turn things in our
environment into energy, As the wind turns turbines, it is
how things are powered, doing work. This generates
and how much energy power that we can store.
different homes, cities, and
countries use or need.

Why can Physics can also help us
natural forms to understand geology,
and disasters such as how our
be explained landscapes were
by physics? formed and how they
might change with
We can also understand time.
natural disasters like
earthquakes and How is a beach formed?
tropical storms with
physics by predicting A beach is made by the waves as
how severe these they move sand, dirt, and rocks.
disasters will be and
when they might occur.

What will Just imagine
physics do in all of the
the future? amazing
things you
might see in
a lifetime.

There are endless things to What is a good way to
study in physics. From hear about what is
energy efficient structures happening in physics?
and engines to advances in
medical science, our Reading science and
understanding of physics technology news can
will make new and keep you informed.
wonderful things a reality.

16

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