Chemistry Unit 1

Question 1

accuracy

Answer 1

how close the measurement is to the true value

Question 2

analyse

Answer 2

examine something in order to find meaning, what it is made of or a relationship with other things

Question 3

claim

Answer 3

a statement that has no provided evidence that is evaluated and then either supported or not supported by the collection of thorough evidence

Question 4

concave

Answer 4

a surface that curves inwards

Question 5

controlled variable

Answer 5

the variable or variables that are kept the same during the experiment

Question 6

convex

Answer 6

a surface that curves outwards

Question 7

concave meniscus

Answer 7

when the molecules of the liquid are attracted to the container more then itself, for example, water, milk, honey

Question 8

convex meniscus

Answer 8

when the molecules of the liquid are attracted to itself more then the container, for example, liquid mercury in a glass container

Question 9

data

Answer 9

facts or statistics gathered to answer a question or for any further analysis

Question 10

dependent variable

Answer 10

a variable that is tested or measured during an experiment (as it responds to the independent variable)

Question 11

experiment

Answer 11

a controlled situation where data is gathered to answer a question

Question 12

hypothesis

Answer 12

a proposed explanation or prediction of an event (e.g., an experiment) based on research and current knowledge

Question 13

independent variable

Answer 13

the variable that is changed during the experiment

Question 14

infer

Answer 14

link to an observation with past knowledge and assign meaning to the observation

Question 15

inference

Answer 15

applying reason or explanation to an observation based on past experiences and known facts

Question 16

knowledge

Answer 16

the understanding of information

Question 17

meniscus

Answer 17

the surface of a liquid in a container

Question 18

observe

Answer 18

use senses and tools to notice something significant

Question 19

parallax error

Answer 19

an error caused by not reading liquid measurements at eye level, which leads to measurements being too high or too low

Question 20

peer-review

Answer 20

to read, check and give and opinion about something that has been written by another scientist or expert working in the same subject area

Question 21

precision

Answer 21

how close measurements are to each other

Question 22

predict

Answer 22

to make an estimate about a possible future event or outcome

Question 23

qualative

Answer 23

a form of data that is a descriptive measurement

Question 24

quantitative

Answer 24

a form of data that is a numerical measurement

Question 25

random error

Answer 25

an error that is random and is caused by factors that can not be easily controlled by the experimenter

Question 26

rationale

Answer 26

background information that supports a research question and hypothesis for an experiment

Question 27

research question

Answer 27

a question that can be answered practically through a scientific investigation or trough research to evaluate a claim

Question 28

systematic error

Answer 28

an error that causes measurements to differ from the true results by a consistent amount, often due to faulty or uncalibrated equipment

Question 29

trend

Answer 29

a pattern in data that shows the general direction/shape of the relationship between the dependent an independent variables

Question 30

variable

Answer 30

a component of an experiment that changes or can be changed