Have you ever tried to figure out how something works or
why something happens? I'm sure you have.
Ever since you were a little baby, a long time ago, you've been learning all
about the world around you. You started out by sticking
everything in your mouth, your baby bottle, your
Banky, your phone,
everything you could get your little hands on. But now that you're older, you
learn in different ways. But you're still learning about the world,
gathering information, doing new things and
trying to figure stuff out. When you do these things, you're
thinking and acting like a scientist.
A scientist is a person was a job learning all about the world,
trying to figure out why things happen and how
things work. Some scientists try to invent new
things and help people.
So in a way, we're all scientists were all
trying new things and learning Every day.
Scientists look just like you and me, so this might make you
wonder. How is a rule grownup scientist
different from me?
Grownup scientists make learning new things and helping people their job.
How great is that? Some scientists like to learn
about plants, some learning about all different kinds of
animals. So I'm signing to spend their time learning about
things in outer space or how to make new medicines that
help people. Some scientists studying the weather
or explore the oceans and others designed new
machines. There are scientists who study the sun,
insects, soil,
volcanoes, electricity, people. I
mean, you name it. If there's something to learn about, there's
a scientist out there who probably already studied it or who wants
to.
For you to act like a scientist, you have to be able to think
like one. Scientists are good at doing scientific
things because they've learned how to think scientifically.
For instance, if a scientist is curious about
something, you might say they have a problem. A
problem is a kind of ah question or a puzzle that needs to be
solved. Oh, like this study. A scientist wants to
find out if ice always float. So, in other words, stays at
the top of liquids. That would be the problem
signed to spend a lot of time trying to solve problems.
So what do you think? Does ice always
float in liquids? Let's find out
before solving problems. Good scientists try to find
information about what they're learning Information is what
we know about something. Maybe the answer to the problem could be found
in a book or on a computer. Well,
I've looked pretty hard here, and I haven't found the answer to our problem.
And my ice is melting. Well, I guess that means it's time for us to
try it out for ourselves. Oh,
one thing first. Now that I have some information
and I know a little bit about what I'm trying to learn about, I'm gonna make
it a hypothesis. Ah, hypothesis
is Ah. Guess it doesn't have to be right. It just
means that using what I know, I might be able to guess
what will happen. So what do I think will happen?
Well, what do you think? My hypothesis is that the ice
will always floating a liquid. That's all I've ever seen it
do. Now it's time to dry it out.
Okay. I've set up an experiment to see if my hypothesis is
right. An experiment is a scientific test to
see what happens here. I have through different kinds of
liquids. This is water. This is baby oil. And
this is soda. which one is a liquid? Now I'm gonna
take some ice and drop it into each liquid to see what will
happen.
Well, I guess my ice is melted. I'll be right back.
Okay? This is better. Now, let's see what happens when I put the
ice in the water.
Here goes. Oh, it
floats just like I thought it would. Now it's trying in the
oil.
What would you look at? That it sinks down
to the bottom. Who now? We'll try The soda
Looks like ice floats and soda too. So I guess the
experiment showed that my hypothesis was wrong.
Ice doesn't always float in a liquid, but that's
okay. You're hypothesis. Doesn't have to be correct for you to
learn something new. It is just a guess.
Mmm.
Now that I finished the experiment, I can come to a conclusion
about what I've learned. Ah, conclusion is kind of like a
decision you make about what you've learned. My conclusion is that
ice does not floating all liquids. It sinks in
some. Doing an experiment is one way that scientists learn about the
world. But it's not the only way.
Hello. My name is Bellow Sanchez. and I'm a chemist.
That means I'm a kind of scientist who gets to mix all kinds of liquids and
powders together to make new things Before I solve the
problem. By making something new, I make a hypothesis.
Like, right now, I'm pretty sure that if I mix these two liquids,
they'll change colors. Next, I'll try the
experiment. What? Carefully
after the experiment, I can come to a
conclusion about what happened before and make a
recommendation. My recommendation for this experiment.
Don't try this at home.
A good scientist never tries an experiment just one time.
Good scientists try things over and over to make sure they're right about what they're
trying to discover. For example, saying my
problem is that I want to find out if magnets will stick
to coins. Now we already know that magnets stick the things
that are made of metal. So my hypothesis is that this
magnet here will stick to these coins. Says
they're made of metal. What do you think will happen? Make a
hypothesis of your own. Okay, let's try
it. Huh?
It doesn't work. I guess my hypothesis was wrong,
But remember I said that good scientists tried things
more than once. I mean, what if this magnet just
isn't working? Well? Well, to be sure, I'll try it
with another magnet. Thank you.
All right, well, and
I'll try it with another magnet to
it still doesn't work, but I've only tried it with
one kind of coin. What if
magnets just don't stick to this kind of coin? I've
got to try the experiment with other coins, too.
Okay, Here's a pile with different kinds of coins. Let's
see if this magnet sticks to any of them.
No. Okay, I'm out this
magnet.
No, not this one, either. All right, let's try the last man in it.
Mmm. This one doesn't stick to any coins either.
By repeating this experiment many times, I can be pretty certain
that if I come to the conclusion that magnets don't
stick two coins, I'd be right.
So I guess that means my hypothesis was wrong
a bit, remember? That's okay, because I learned something.
You don't have to be right toe. Learn from science experiment, and
I'm not completely sure that my hypothesis is wrong. See, I
know there are more coins out there from other places in the world,
Then maybe magnets will stick to some of those coins. So I'm gonna try this
experiment again. If you ever get my hands on some of those different kinds of
coins, I'll repeat the experiment to make sure that I'm
right, because that's what good scientists do
in order for a scientist to learn. It's important to be a good observer.
When you observe something, it means you look at it
or watch it carefully. Like right now, I'm
using these binoculars to observe a cardinal in the yard outside the
window. But here, take a look,
huh? There he goes, huh?
Well, people observe things all the time. But when scientists doing its toe
learn something new, I like to observe birds so I can
compare them to one another. Things you
get to see how they're the same and how they're different before
example, an ostrich is another kind of bird. It's
like a cardinal because it has feathers, a beak and other things in
common. But ostriches can't fly like cardinals. They have
long legs made for running. Instead, by
observing, we get to compare things and learn about them.
There's a great big world out there to learn about two full of all
kinds of things. You might be interested in observing and
comparing, and many scientists like to choose something in
particular to learn about. Scientists would like to learn
about volcanoes Air called vulcanologist.
Scientists learn about the air, and the weather are called
meteorologists. A scientist who learns about
fish is called an ichthyologist, and the
chemist is a scientist who deals with chemicals.
There are lots of different names. We give two different kinds of scientists.
You'll have one of those scientific names someday. Just keep
on observing and comparing things and you'll be on your
way. I think I see another bird
think like a scientist.
Ah, a scientist is someone who likes to learn about the world, how things
happen and how things work. Scientists learn
about all different kinds of things. To be a scientist, you
have to think scientifically. Scientists learn new
things by asking questions and solving problems. They
gather information, make a hypothesis about what they think is
right, do experiments and come to a conclusion when
they find the answer to the problem. Good scientists repeat their
experiments over and over to make sure their conclusions are correct.
Scientists also spent a lot of time observing thing.
Then they compare things to see how they are alike and how they're
different. Being a scientist is a fun job because
scientists get to learn about all kinds of things they like to learn about.
If you could be a scientist someday, what will you like to learn about?
Scientists are very busy people. They
observe things compared things. And there are a lot like
you and me, science and me,