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WorksheetsPh&Ch - Unit 1 - Scientific Method
Total questions: 18
Worksheet time: 2hrs 39mins
In general, scientific research begins with...
a) an experiment.
b) the formulation of a hypothesis.
c) observation, asking a question and setting out a problem.
d) scientific communication
Formulating ideas about a problem you are going to investigate is called ...
a) coming up with a theory or law.
b) speculating.
c) formulating a hypothesis.
d) brainstorming
What are the different sections of a scientific report or article?. One of these answers is NOT correct.
Title
Abstract
Variables and constants
Conclusions
Material and methods
When we draw a graph of our results, which variable do we show on the x-axis (horizontal) and which on the y-axis (vertical)?
The independent variable (for example, time) is shown on the x-axis and the dependent variable is shown on the y-axis
The dependent variable is shown on the x-axis and the independent variable (for example, time) is shown on the y-axis
It does not matter.
One equation that represents QUADRATIC proportionality is...
a) A = k × B
A = k × B2
A = k × B4
A = k × 2B
When we carry out research or an experiment, we have to...
study all the variables without the need for controlling them
try to minimise errors by paying close attention to the accuracy of the measurements
study each variable separately, allowing other variables change
proceed whatever way we want until we find something interesting.
The different factors that we think will intervene in a problem are called...
problems.
conclusions.
oscillations
variables
The graph that represents direct proportion is...
a parabola.
an axis.
a linear graph with a gradient.
a straight horizontal line.
The accuracy of a tool is...
the price of the tool.
the smallest value it can measure.
the largest value it can measure
I don't know
Study the following graph representing the distance at which a body in motion is found at different times. Which line best adapts to all the data? Which type of proportionality does it represent?
Straight horizontal graph, no proportion at all
Linear graph with a gradient, direct proportion
It is a parabolla, direct proportion
It is a parabolla, quadratic proportion
Taking into account the graph, work out the equation that represents all this data.
A = k*B
A = k*B + 8
A = k*B + 10
A = k*B + 0
The equation is A = k*B + 10. So know calculate the constant K ("Pista: puedes sacar los valores de A y B de la gráfica").
K= 2
K= 12
K= 4
K= 0,005
K= 200
So we already know that the equation is A = k*B +10 and the constant k is 4. Answer the question: At what distance is the body after 15 s?
10 m
8 m
55 m
70 m
18 m
In a laboratory experiment, weigh the liquid content of a test tube as a specific volume is added. When the volume added is 5, 10, 15, 20, 25 and 30 mL, the corresponding masses are 4, 8, 12, 16, 20, 24 grams, respectively. This is the table. What is the independent variable of the experiment?
Mass
Volume
There is no independent variable
Represent the data of the table in a graph. Which type of graph is?.
Straight horizontal graph
Linear graph with a gradient
Parabollic graph
This is the graph. Its equation is A = k*B, because A0 is equal to 0 ("si alargas la recta, se ve que cruza por el punto 0,0"). Calculate the constant K.
K = 1
K = 2
K = 3
K = 0,8
K = 1,2
So the equation is A = 0,8*B. Which mass would correspond to a volume of 70 mL?
46 g
54 g
56 g
86 g
93,4 g
Last question of the quiz. Same table and data. Same equation. What volume would have been added when the scale marks 52 g of mass?
42 mL
60 mL
65 mL
81 mL
