science inquary task

What does aim mean

An aim is a statement on the purpose of your experiment. It is your goal.

Independant variable

the one you are changing

dependant variable

the one you meaure

control variable

the ones you keep the same

Why do we need an equipment list

so we know all the equipment that we need to conduct the experiment and we can get everything out and be prepared

what is the purpose for a procedure

so we know how to conduct the experiment and we are doing it correctly and that it is reliably and it increses validity

what is reliability

it is how consistent the results of an experiment are when repeated

how do we increase reliability

we increase it by doing the experiment multiple times like doing it three times and then getting the average. doing that means the experiment is reliable

what is validity

how well a study or experiment measures what it is intended to measure

how do we increase validity

we increase validity by having more control variables thinks that we keep the same, and you can also use a control group that is when you have one test when you get rid of the independant variable and it helps with validity

6 things to include in graph

title include independant and dependant variable

scale evenly spaced

right graph line or coloum

label axes plus units

plot correctly

legend/key if requaired

when do you use a line graph

a line graph is continues data, if the independant veriable is numbers then it is a line graph

when do you use a coloum graph

when the data is discrete and the independant variable is in words.

acid

it is a substance that produces hydrogen ions when disolved in water

alkaline

a substance that produces hydroxide ions when disolved in water

ph

is a measure of how acidic or basic a substance is. It ranges from 0 to 14

neutralisation

is a reaction between an acid and a base that results in a solution with a ph close to 7

indicator

a solution that changes colour depending on the ph

antacid

a medicne that works to conteract or neutralize stomach acid, to help heartburn. It decreses the acidity in the stomach.

Acid + base

salt + water

Acid + metal

Salt + hydrogen

Acid + metal carbonate

Salt + water + carbon dioxide

calcium carbonate

CaCO3

magnesium hydroxide

Mg(OH)2

sodium bicarbonate

NaHCO3

hydrochloric acid

HCl

Sodium chloride

NaCl

carbon dioxide

CO2