Thank you very much!

I still haven't found anything on biodiversity in water. I need to find a website which explains the possible scientific objectives of this type of topic. Remember that the research will be carried out by 17-year-old Italian students specializing in science and then will be translated into English. So the language used must be very simple.

All I can do is try to find articles for you -- articles that may give you enough information to write up objectives of your own.

Aquatic biodiversity (in general):
http://www.google.com/search?rlz=1C1GGGE_enUS379US379&aq=2&oq=aquatic+biodiversity+&ix=hcb&sourceid=chrome&ie=UTF-8&q=aquatic+biodiversity+definition

... in Europe:
http://www.google.com/search?hl=en&rlz=1C1GGGE_enUS379US379&q=aquatic+biodiversity+in+europe+rivers&oq=aquatic+biodiversity+in+europe+rivers&aq=f&aqi=&aql=&gs_sm=e&gs_upl=80887l90868l0l91005l16l16l0l7l0l0l312l504l0.1.0.1l2l0
and
http://www.google.com/search?hl=en&rlz=1C1GGGE_enUS379US379&q=aquatic+biodiversity+in+europe+lakes&oq=aquatic+biodiversity+in+europe+lakes&aq=f&aqi=&aql=&gs_sm=e&gs_upl=37972l38572l0l38755l5l5l0l0l0l0l0l0ll0l0

Read widely ... very widely!

To find a website that explains the scientific objectives of biodiversity in water in a simple language suitable for 17-year-old Italian students specializing in science, you can follow these steps:

1. Start by conducting a search using suitable keywords: "biodiversity in water scientific objectives," "scientific objectives of studying biodiversity in water," or "objectives of studying water biodiversity."

2. Use a search engine like Google (www.google.com) or Bing (www.bing.com) and enter the keywords into the search bar.

3. Browse through the search results and look for websites from reliable sources such as educational institutions, scientific organizations, or government agencies. These sources often provide accurate and easy-to-understand information.

4. Look for websites that are targeted towards students or have educational content intended for young audiences. Such websites may have simplified language and explanations suitable for your needs.

5. When evaluating the websites, pay attention to the credibility and reputation of the source. Look for websites with a .edu (educational institution), .gov (government agency), or .org (non-profit organization) domain. These sources often provide more reliable and scientific information.

6. Read the website summaries or descriptions in the search results to see if they mention simple language or educational content. This can give you an idea of whether the website is suitable for your requirements.

7. Click on the search results that seem promising and explore the websites to find the information you need. Look for sections or articles that explain the scientific objectives of studying biodiversity in water. Make sure the language used is simple and understandable for your age group.

By following these steps, you should be able to find a website that meets your requirements for explaining the scientific objectives of biodiversity in water in a language suitable for 17-year-old Italian students specializing in science. Good luck with your research!