WORKING SCIENTIFICALLY

Question 1

What is science?

Answer 1

Science is the intellectual and proactive activity encompassing the study of the structure and behaviour of the physical and natural world through observation and experiment

Question 2

What is technology

Answer 2

Technology is the application of scientific knowledge for practical purposes, especially in the industry.

Question 3

How must scientific diagrams be drawn and labelled?

Answer 3

Scientific diagrams must be drawn using straight lines using a ruler and only curved if the scientific drawing is designed that way. The labels must touch the items they are labelling and extend out in perpendicular lines from the item.

Question 4

Who was the bunsen burner found by?

Answer 4

Robert Bunsen created the Bunsen Burner

Question 5

What is a practical investigation?

Answer 5

A practical investigation is a test on a small part of the world around us. It can be designed or followed.

Question 6

What are observations and measurements?

Answer 6

Observations and measurements are things that scientists record down. Scientists do this by using their five senses (sight gives most info)

Question 7

What are qualitative observations?

Answer 7

Qualitative observations are the observations made through explanation and are descriptive such as diagrams.

Question 8

What are quantitative observations?

Answer 8

Quantitative observations are the observations made by using numerical values and numbers such as measurements. It allows scientists to be more detailed and accurate.

Question 9

What are mistakes?

Answer 9

Mistakes are accidental and are performance based. They can be self corrected and avoided by being more careful

Question 10

What are errors?

Answer 10

Errors are unavoidable and are always present in measurements and data

Question 11

What is an inference?

Answer 11

An inference is a logical explanation about what happened and why it happened including cause and effect relationships.

Question 12

What a prediction?

Answer 12

A prediction is a logical guess based on observation that were made. Also a belief on present knowledge.

Question 13

What is an independent variable?

Answer 13

The independent variable is the part of the experiment that you change( only one of these)

Question 14

What is the dependent variable?

Answer 14

The dependent variable is what you measure in an experiment depending on the independent variable.

Question 15

What are controlled variables?

Answer 15

Controlled variables are the variables that are kept constant through the experiment.

Question 16

How is a bar graph useful?

Answer 16

Bar graphs easily compare data. The bars are evenly spaced and have the same width however in double bar graphs the compared bars are not. They always require key/legends

Question 17

How is a line graph useful?

Answer 17

A line graph is used to illustrate change over a course of time. Line graphs need a title, x axis(independent variable), y axis(dependent variable), an appropriate scale, plots, or key if required.

Question 18

What is the yellow flame of a Bunsen burner?

Answer 18

The yellow flame is the cooler flame and is more visible towards a person. It is the dirty flame due to its colour. The yellow flame is created by closing the air hole.

Question 19

What is the blue flame of a Bunsen burner?

Answer 19

The blue flame is the hotter flame with its temperature reaching 1500 degrees in heat. It is dangerous as it has a blue to invisible colour, making it hard to see. It is created by opening the air hole and moving more oxygen.

Question 20

How do you turn on a Bunsen burner?

Answer 20

List the steps

Question 21

What are the safety rules in a science lab?

Answer 21

The safety rules are not tying back your hair don’t eat or drink in the lab, or smell or taste chemicals.

Question 22

What is parallex error?

Answer 22

A parallex error is when the reading of certain items are different when viewed in different angles.

Question 23

Why is the yellow flame the safety flame?

Answer 23

The yellow flame is the safety flame as it is more cooler than the blue flame and highly visible due to the combined mixture of oxygen in the bunsen burner.

Question 24

How do you write a conclusion?

Answer 24

State the results of the experiment.

Question 25

What is a hypothesis?

Answer 25

A hypothesis is an educated guess about the result of an experiment. A hypothesis can be supported by the experimental results.

Question 26

What is a theory?

Answer 26

A theory summarises the hypothesis that have been supported by repeated testing. A theory remains until there is evidence to dispute it.