And now, it's time to try some practice problems
on IXL. So, the first question here is asking:
select the part of the passage that describes
developing the hypothesis. And it gives you
a hint. To develop the hypothesis, you use
your knowledge to propose a possible explanation
and to make a prediction that can be tested.
So basically, in this paragraph, you're trying
to find a section of the passage that talks
about you proposing a possible answer. Okay?
So what you think the answer is okay. Brennan
grew basil plants, that doesn't sound like
an answer. He noticed that his basil plants
did not grow many leaves. Doesn't sound like
an answer. Brennan read in a book that earthworms
in teh soil have helped parsley leaves grow.
This made Brennan consider whether his basil
plants were not growing many leaves because
their soil lacked earthworms, and that his
plants would grow more leaves if he added
earthworms. So, this sounds like a hypothesis
because he's considering something, considering
something, and he's trying to figure out if
this consideration of the basil plants will
cause the plants to grow more if he had earthworms
as opposed to not. So I would pick that for
developing the hypothesis. Okay, next part,
identifying the question. To identify the
question, you pose a question that focuses
on a problem. So on this part, you're just
trying to figure out what are you trying to
solve? So, Krysta pushed Melissa and Melissa's
little brother, Krysta noticed that Tom always
swung back, Krysta asked Melissa if she thought
the weight on a swing was related, to find
out, Melissa stood back four feet and released
a swing three times, once with a light weight,
once with a medium weight, once with a heavy
weight. Okay, I'm going to stop there. So
right here, this part's actually talking about
data and like analyze or collecting the data
effectively. So, and this is talking about
how she did it, and they talked about the
experiment and that goes further on to what
it is. Okay? So if we go backwards one, it
says, "Krysta asked Melisha, Melissa, if she
thought the weight on a swing was related
to the time it took to return. That's basically
asking, what is the question, what are you
trying to solve. So that would be identifying
the question. Next one. Developing the hypothesis.
Once again, you're trying to propose a solution,
so basically, what do you think is the answer?
So, Heather was a deejay, I'm gonna skip.
She wanted to know how to make the bubbles
last longer. Maybe. She read in a book that
bubbles burst because the liquid that makes
up the bubbles evaporates. Okay. She knew
that warm liquids evaporate faster than cold
liquids. So, Heather expected that the temperature
of the bubble solution could affect how long
the bubbles lasted, with colder bubbles lasting
longer. So, this sounds like she's trying
to explain to us what exactly she thinks is
going to happen, so I would go with that.
Cool. All right, one more, identiying the
question. So once again, you have to pose
a question, what are you trying to solve?
So Nicole grew roses, that's not a question.
One day she noticed something, not a question.
She read a book about plant diseases, also
once again, not a question. She read that
uh, allicin? A chemical in garlic, can kill
bacteria. That's uh, information. She was
curious if garlic could prevent more tumors
from forming on her plants. So, this sounds
like a potential question. What are we trying
to solve? We're trying to figure out if garlic
can prevent tumors from growing, that sounds
like a question to me, so I would click on
that. Please be aware, I don't read the entire
thing because the second half usually talks
more about the experiment, and the data and
the conclusion. So the moment I find it, I
tend to stop reading. Cool. All right. Umm,
let's try, one more here, and then I'm going
to move on to the next stage. So, testing
the hypothesis, you need to have a series
of observations and carry out an experiment,
so basically, we need to figure out, what
exactly are they going to do, and how they're
going to do it. Uh, explain to her science
class that objects fall at the same speed,
the class wanted to explore that idea by dropping
objects with different masses. Okay that sounds
like it potentially. Maybe, that's their question,
they're trying to solve it. The students dropped
seven balls, apples, scarves and pieces of
paper out of their classroom window and recorded
how long it took each object to reach the
ground. So, this sounds like they're testing
it because this is the experiment that they're
doing. You specifically know that they're
dropping a certain number of balls out of
the classroom. So I would pick that one for
testing the hypothesis. Okay, uh stage two,
drawing a conclusion. So, to draw a conclusion,
you decide if the results support the hypothesis.
So in other words, whatever your question
is, did you find information to support it,
or not? So, a severe ice storm, he wondere
how he could melt ice on the sidewalk. This
sounds like, the question. He had heard that
sand, when heated, could melt ice. Just some
stuff he's thinking about. He had twenty ice
cubes that were equal in weight. So, now we're
getting closer to the experiment portion.
He sprinkled sand on half of the ice cubes
and left the other half unsanded. He placed
all the cubes outside for one hour and brushed
off the sand. Hanson calculated the average
weight of each type of cube to see if the
sanded cubes melted more than the unsanded
cubes. He did a lot of experimenting. He decided
that the sand did not speed up melting, since
the two types of cubes were similar weight.
Okay, this sounds like he figured out what
he decided, which is, his conclusion is that
he decided that, it doesn't seem to speed
up the melting. Yea, this is just stuff that
he read, so that doesn't count. He predicted
that yea, that's his, that's his like what
he predicted, that's what he thought would
happen. So they put the hypothesis kind of
at the end, which is interesting. But yea.
Next part, analyzing the data. You need to
examine data and look for patterns, so basically
any part where we're looking at data and it
looks like they're trying to figure out what
it means. Every morning, Isaac watched hummingbirds,
nope. He noticed that hummingbirds often drank,
nope. He wondered if the color of the feeder
would influence it, nope. Isaac hung a red
feeder, you're getting closer, but nope. Every
day for a week, he spent an hour, this is
once again, just doing it. Okay? At the end
of the week, he compared the average number
of visits to each feeder, and he found that
there were more visits to the red than to
the white. So this sounds like he collected
his data, and then he determined that the
red feeder had more visitors, so that's his
analysis. That's what he determined, based
off of his experiment. So that would be analyzing
data!
