Unit 1 test

Question 1

Scientific question

Answer 1

question that can be tested by an experiment and results can be measured to provide an answer. Scientific questions are not opinion questions.

Question 2

Hypothesis

Answer 2

An educated guess or prediction to your scientific question. It is an if then statement.

Question 3

Independent variable

Answer 3

Factor that is changed by the scientists on purpose to test out an idea; Manipulated.

Question 4

Dependant variable

Answer 4

the result that is measured by scientists to decide the outcome of the experiment.

Question 5

Prediciton

Answer 5

Statement based on observations or past knowledge about what will happen in the future.

Question 6

Inference

Answer 6

Statement based on evidence and observations about what happened, an explanation of why or how.

Question 7

Density

Answer 7

Amount of mass or matter in an object

Question 8

Constants/controlled variable

Answer 8

Something in an experiment that you don’t change, on purpose to make sure your results are reliable.

Question 9

Controlled variable

Answer 9

Something in an experiment that you don’t change, on purpose to make sure your results are reliable.

Question 10

Controlled experiment

Answer 10

An experiment that only has one independent variable. It is reliable.

Question 11

Control group vs experimental group

Answer 11

The control group is used for comparison, and the experimental group is the group that is tested to answer a scientific question.

Question 12

SI units

Answer 12

International System of Units. It is easy to convert because it is based on 10. It is the most common unit of measurement for scientists around the world.

Question 13

Meniscus

Answer 13

When liquid curves downwards or upwards on the sides of the surface it is in.

Question 14

Scientific law vs scientific theory

Answer 14

law - usually laws that refer to how nature will behave under certain conditions, frequently written as an equation

theory - more overarching explanations of how nature works and why it exhibits certain characteristics

Question 15

Graph

Answer 15

an organized representation of data

Question 16

model

Answer 16

A visual representation of a concept that is usually smaller.

Question 17

standard

Answer 17

a level used for comparison

Question 18

bias

Answer 18

A motivation that changes something based on opinion unfairly.

Question 19

Sig Figs

Answer 19

each of the digits of a number that are used to express it to the required degree of accuracy

Question 20

Precision and accuracy

Answer 20

Precision – the measure of how close a range of data is. Accuracy – the measure of how close a given data point is to the standard data point.

Question 21

sig fig rules for multiplication and division

Answer 21

The number with the least amount of sig figs determines how many sig figs the answer can have

Question 22

sig fig addition and subtraction rule

Answer 22

the number with the least amount of sig figs after the decimal point determines how many sig figs are after the decimal point in the answer

Question 23

zero rules (5)

Answer 23

1. Leading zeros are never sig
2. nonzeros are always sig
3. middle zeros are always sig
4. trailing zeros after a decimal point are always significant
5. trailing zeros with no decimal point after them are never sig