L’origine de la matière

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.

Necessary

Toujours activé

Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.

Cookie	Durée	Description
cookielawinfo-checkbox-advertisement	1 year	The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Advertisement".
cookielawinfo-checkbox-analytics	1 year	This cookies is set by GDPR Cookie Consent WordPress Plugin. The cookie is used to remember the user consent for the cookies under the category "Analytics".
cookielawinfo-checkbox-necessary	1 year	This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-performance	1 year	This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
PHPSESSID	session	This cookie is native to PHP applications. The cookie is used to store and identify a users' unique session ID for the purpose of managing user session on the website. The cookie is a session cookies and is deleted when all the browser windows are closed.
SERVERID		This cookie is used to assign the user to a specific server, thus to provide a improved and faster server time. It remembers which server had delivered the last page on to the browser. It also helps in load balancing.

Functional

Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.

Cookie	Durée	Description
currency	1 hour	This cookie is used to store the currency preference of the user.
lang		This cookie is used to store the language preferences of a user to serve up content in that stored language the next time user visit the website.

Performance

Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.

Cookie	Durée	Description
YSC	session	This cookies is set by Youtube and is used to track the views of embedded videos.
__utma	2 years	This cookie is set by Google Analytics and is used to distinguish users and sessions. The cookie is created when the JavaScript library executes and there are no existing __utma cookies. The cookie is updated every time data is sent to Google Analytics.
__utmb	30 minutes	The cookie is set by Google Analytics. The cookie is used to determine new sessions/visits. The cookie is created when the JavaScript library executes and there are no existing __utma cookies. The cookie is updated every time data is sent to Google Analytics.
__utmc	session	The cookie is set by Google Analytics and is deleted when the user closes the browser. The cookie is not used by ga.js. The cookie is used to enable interoperability with urchin.js which is an older version of Google analytics and used in conjunction with the __utmb cookie to determine new sessions/visits.
__utmt	10 minutes	The cookie is set by Google Analytics and is used to throttle request rate.
__utmz	6 months	This cookie is set by Google analytics and is used to store the traffic source or campaign through which the visitor reached your site.

Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.

Cookie	Durée	Description
IDE	1 year 24 days	Used by Google DoubleClick and stores information about how the user uses the website and any other advertisement before visiting the website. This is used to present users with ads that are relevant to them according to the user profile.
OAGEO	session	This cookie is set by the provider OpenX. This cookie is used for advertising campaigns on the website. The cookie helps in avoiding the same ad showing repeatedly.
OAID	1 year	This cookie is set when an AdsWizz website visitor have opted out the collection of information by AdsWizz service or opted to disable the targeted ads by AdsWizz.
test_cookie	15 minutes	This cookie is set by doubleclick.net. The purpose of the cookie is to determine if the user's browser supports cookies.
VISITOR_INFO1_LIVE	5 months 27 days	This cookie is set by Youtube. Used to track the information of the embedded YouTube videos on a website.

Others

Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.

Cookie	Durée	Description
CONSENT	16 years 8 months 19 days 4 hours	No description
cookielawinfo-checkbox-functional	1 year	The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-others	1 year	No description
corpus		No description
fb_sessiontraffic	20 minutes	No description
pathway	20 minutes	No description
SRV		No description
TS011556a6		No description
visitor	1 year	No description

Actualités

L'association

Testé !

Au jour le jour

Chroniques radio

SOS Exposés

SOS DNB SVT

Réussites en SVT

PSC 1

Humour

Café Pédagogique