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level: Basics

Questions and Answers List

level questions: Basics

Question	Answer
Hypotheses need to be based on…	Observations
What is the scientific difference between a hypothesis and a theory?	The amount of evidence by which they are supported
Essentially, a hypothesis is a...	Conjecture
Scientific theories are supported by...	Substantial evidence
What is a Hazard?	Something that could potentially cause harm
Microorganisms, chemicals, fire and electricity are all examples of ___ investigations	Hazardous
When investigating a hypothesis, for the results to become valid it is essential that the experiment is constantly…	Repeated
To ensure the results of your investigation are reproducible, you can compare them by taking another set of readings using?	Different equipment
which type of model uses shapes or analogies to describe a system?	representational
Which type of model uses patterns of data of past events, known scientific relationships and calculations to make predictions	Mathematical
which type of model uses words to describe the features of a system and how they interact	descriptive
A mathematical model that needs a computer to carry out complex calculations defines a ___ model	Computational
A computational model used to show how predicted data appears in three dimensions defines a ___ model	Spatial
What model would you use to make simulations of climate change?	Computational
What kind of model would you use when forecasting the weather?	Computational
____ are used in the study of earthquakes	Computational models
Can computational modeling improve medical care/ biomedical research?	Yes
If you add together all your data values and divide by the total number of values in the sample, what data will you be collecting?	The mean (average)
Finding the largest number and subtracting the smallest number from it will provide you with what type of calculation?	The range
In a calculation the first significant figure of a number is…	The first digit that is not zero
In a calculation you should always round the numbers to the…	Lowest number of significant figures
The first significant figure in a number reads from…	Right to left
The trailing zeros in a whole number are…	Significant
The leading zeros in a decimal are…	Not significant
The last zero in a number, behind a significant figure after the decimal is…	Significant
What is the first significant figure? 72,361	7
What is the second significant figure? 95,826	5
What is the forth significant figure? 41,762	6
How many significant figures are there? 72,361	5
How many significant figures are there? 0.000428	3
What is the first significant figure? 0.002051	2
What is the third significant figure? 0.09537111	3
If your data collected is in categories, which type of chart should you use?	Bar chart
If your data collected is continuous, how should you display this data?	Plot a graph
What do you call the slope in a linear graph?	The gradient
How do you calculate the gradient?	gradient = change in y / change in x
As one variable increases the other increases, this is called a ___ correlation	Positive
As one variable increases the other decreases, this is called an ___ correlation	Inverse
How many significant figures are there? 0.03	1
What is the first significant figure? 0.6	6
Your mum	your mum answer