Ph&Ch - Unit 1 - Scientific Method

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