sciencenotes.org

Science Notes and Projects publishes hands-on science activities you can run at home, in a classroom, or for a science fair, alongside the reference material that supports them. The site's own project list includes Make Elephant Toothpaste, Different Ways To Make Slime, Make Colored Fire, and Make a Crystal Undersea Garden. Each project is written up as an article with steps and materials, so the practical starting point is to open the project page and read the method before gathering anything.

Projects Listed on the Site

The site's project section names these activities directly:

• Make Elephant Toothpaste – a fast, foamy reaction demonstration
• Different Ways To Make Slime – multiple slime recipes rather than a single method
• Make Colored Fire – flame-color demonstrations
• Make a Crystal Undersea Garden – a crystal-growing project

These sit alongside the site's broader crystal-growing content, including "How to Grow Crystals," so crystal projects are one of the areas with more than one write-up.

Which Discipline Each Project Touches

The project list leans heavily toward chemistry, which matches the site's overall emphasis on chemistry reference material such as its periodic tables, chemistry dictionary, and chemistry charts and tables.

Choosing a Project for Your Setting

The right pick depends on where you're running it:

• Home, kitchen-safe setup: slime and crystal growing are the most forgiving, since they use ordinary containers and can be left to sit.
• Classroom demonstration: elephant toothpaste and colored fire read well to a group because the visible change is immediate. Colored fire needs a heat source and ventilation, so treat it as a supervised demonstration rather than a solo activity.
• Science fair or display: a crystal undersea garden works as a display piece because it develops over time and can be shown at different growth stages.

If you need a project that produces something to keep and observe over days, choose a crystal project. If you need something that finishes in one session, choose elephant toothpaste or slime.

How to Find Steps and Materials

The site organizes content by type, and the project articles are the place to look for method and supply lists:

1. Start from the project list on the site's main page, which links each named project.
2. Open the individual project article — that page carries the steps and the materials for that activity.
3. For background, use the supporting reference pages: the periodic table with 118 element names and symbols, the alphabetical list of the chemical elements, periodic table trends, valences of the elements, and electron configurations of the elements.
4. For related worksheets and printables, the site also publishes biology worksheets and math worksheets covering algebra, geometry, trig, and arithmetic.

The reference tables are available as PDF files you can save and print, which is useful when you want a data sheet next to the experiment rather than on a screen.

What to Check Before You Start

The site describes itself as covering experiments, projects, and notes across scientific disciplines and educational levels, so difficulty varies by article rather than being sorted into fixed grade bands. Read the specific project page to judge whether the materials and supervision level fit your situation. For anything involving flame or a strong reaction, confirm the safety notes on that article and run it with adult supervision and adequate ventilation.

Science Notes and Projects (sciencenotes.org) is a science education website that publishes articles, experiments, and printable reference materials for all scientific disciplines and educational levels. It is aimed at students, teachers, and anyone who wants a quick explanation of a science topic or a ready-to-print chart. The site describes its own output as "experiments, projects, and notes for all scientific disciplines and educational levels," and it produces both written articles and downloadable science graphics.

What the site covers

The content falls into a few broad categories:

• Science articles and notes — explanations of topics across chemistry, physics, biology, and math, including a comprehensive chemistry dictionary organized by letter.
• Printable periodic tables — multiple versions, including a table with the official names and data for all 118 elements, plus free printable periodic tables in PDF and PNG formats.
• Charts and reference tables — PDF printouts such as an alphabetical list of the chemical elements, periodic table trends, valences of the elements, and electron configurations of the elements.
• Worksheets — biology worksheets and printables for K-12 and college, and math worksheets covering algebra, geometry, trigonometry, arithmetic, and more.
• Projects and demonstrations — hands-on activities such as making elephant toothpaste, different ways to make slime, colored fire, and a crystal undersea garden.
• Math reference sheets — trigonometry materials including right triangle trigonometry functions, special triangles, trig tables for sine, cosine, and tangent values, and a trig identities study sheet.

Who it is for

The site states its material spans "all scientific disciplines and educational levels," so the range runs from K-12 through college. In practice:

• Students can use the notes, dictionary, and worksheets for study and homework reference.
• Teachers can print periodic tables, charts, and worksheets for classroom use.
• General readers can find project ideas and short explanations of science concepts.

What format the resources come in

Most resources are either web articles you read online or files you download and print. The charts and tables are explicitly offered as PDF files that you can save and print at your convenience, and the periodic tables are available as both PDF and PNG. The site also publishes science and math jokes across chemistry, physics, engineering, and trigonometry if you want lighter material.

Practical notes

• The periodic table resources cover all 118 elements with official names and data.
• The chemistry dictionary is split into a separate page per letter so you don't have to scroll through one long list, and many terms link to fuller articles.
• The site invites reader requests for trigonometry or statistics content, noting that its authors hold degrees in math.

If you need a printable periodic table, a quick chemistry or physics explanation, or a classroom worksheet, this site is a reasonable first stop. If you need peer-reviewed research or citation-grade primary sources, look elsewhere — this is an educational reference and project site, not a journal database.

Science Notes and Projects (sciencenotes.org) hosts printable periodic tables and chemistry reference sheets as free downloadable files, mainly in PDF and PNG formats. You can reach them directly from the site's homepage sections for periodic tables, chemistry charts, and worksheets. The tables cover the full 118 elements with official names and data, and the reference sheets include periodic table trends, valences, electron configurations, and an alphabetical element list. All of these are presented as print-ready files you can save and print at your convenience.

Printable Periodic Tables

The site's periodic table collection is the main draw. According to the site, you'll find "all kinds of printable periodic tables and science graphics," with files offered as PDF and PNG.

Key options described on the site:

• Periodic Table with 118 Element Names and Symbols — the Science Notes periodic table with official names and data for all 118 elements.
• Metals, Metalloids and Nonmetals — a periodic table showing element locations by category.
• Periodic Table Trends — a reference chart summarizing trends across the table.

Because the files come in both PDF and PNG, you can choose PDF for clean printing or PNG for inserting into slides and documents.

Other Chemistry Charts and Tables

Beyond the periodic table itself, the site groups several printable chemistry references together. The site notes that "sometimes it's just easier to have a printout of important information," and these tables are available as PDF files you can save and print at your convenience:

These are useful when you need a quick lookup rather than reading a full article.

Chemistry Dictionary and Term Links

The site also maintains a comprehensive chemistry dictionary, organized with a separate page for each letter so you don't have to scroll through one long list. Many dictionary terms link out to fuller articles on the topic, so the dictionary works as both a glossary and a navigation hub into related chemistry content.

Related Worksheets and Study Aids

If you're using the reference sheets for teaching or study, the site also offers:

• Biology worksheets and printables for K–12 and college.
• Math worksheets in algebra, geometry, trig, arithmetic, and more.
• Trigonometry reference sheets, including right triangle trigonometry, special triangles, trig tables (SIN, COS, TAN values), and a PDF trig identities study sheet.

How to Get the Files

1. Go to sciencenotes.org.
2. Use the periodic table or chemistry charts sections to find the specific table or reference sheet you need.
3. Open the PDF or PNG file.
4. Save it and print it at your convenience.

The site describes these as free printable resources, and the files are designed to be saved and printed whenever you need them.

Yes. Science Notes and Projects publishes free biology worksheets and printables for K-12 and college, plus math worksheets covering algebra, geometry, trigonometry, arithmetic, and more. The site also offers printable trigonometry reference sheets and chemistry charts and tables as PDF files. The material is presented as free educational content; no pricing or login requirement is mentioned in the site's own description.

Biology Worksheets and Printables

The site states that it provides biology worksheets and printables for K-12 and college levels. This makes it a reasonable starting point if you need practice material or classroom handouts across a wide range of grade levels rather than a single course.

Because the description groups K-12 and college together, expect the collection to span introductory life-science topics through more advanced material. Check the individual worksheet pages for the specific topic and level before assigning or printing.

Math Worksheets

Math worksheets are available in several subject areas:

• Algebra
• Geometry
• Trigonometry
• Arithmetic
• Additional math topics

The site notes that its authors both hold degrees in math, and it invites requests for trigonometry or statistics content. That means the math section is actively maintained rather than a fixed archive.

Trigonometry Reference Sheets

Beyond practice worksheets, the site offers printable trigonometry references:

• Right triangles
• Trigonometry functions
• Special triangles
• Trig tables — SIN, COS, and TAN values
• PDF trig identities study sheet

These are reference sheets rather than problem sets, so they pair well with the worksheets when you need both formulas and practice.

Chemistry Charts and Tables

If your needs extend past biology and math, the site also provides essential chemistry references as PDF files:

• Alphabetical list of the chemical elements
• Periodic table trends
• Valences of the elements
• Electron configurations of the elements

These are downloadable and printable at your convenience.

How to Get and Use the Materials

The worksheets and reference sheets are accessed directly through the site's pages. The chemistry tables are described as PDF files you can save and print whenever you need them. The periodic tables are available as both PDF and PNG.

A practical workflow:

1. Identify the subject and level you need (for example, high school algebra or college biology).
2. Open the matching worksheet or reference page.
3. Download the PDF or PNG where offered.
4. Print or save for offline use.

What to Keep in Mind

• The site describes its content as free, but it does not state terms of use for classroom redistribution — check before sharing widely.
• Coverage is broad (K-12 through college), so verify the difficulty level of a specific worksheet before using it.
• Reference sheets and worksheets serve different purposes; use the trig identities and tables alongside the practice problems rather than instead of them.

If you want to see everything in one place, the site's main page links to its biology worksheets, math worksheets, periodic tables, chemistry dictionary, and project guides.

Yes. Science Notes and Projects hosts a dedicated humor section with joke collections for chemistry, math, physics, and engineering, plus a general science and math joke collection. The site describes the section as a way to "spend a little time laughing (or groaning) at the lighter side of science," and it invites readers to post a reply to share their own science joke.

What joke categories are available?

According to the site's own listing, the humor content is organized into these collections:

Each category is presented as its own page, so you can go straight to the subject that matches your class, club, or personal interest rather than scrolling through a mixed feed.

How the humor fits the rest of the site

Science Notes and Projects describes itself as a place for "experiments, projects, and notes for all scientific disciplines and educational levels," including biology and math worksheets, printable periodic tables, a chemistry dictionary, and chemistry reference charts. The joke pages sit alongside that instructional material rather than replacing it — the stated purpose is adding humor to your life and offering a lighter side of science.

That positioning matters if you are deciding whether to use the site:

• For teaching or presenting: A subject-matched joke list gives you a short, topical opener or break that stays within the discipline you are already covering.
• For students: The jokes are grouped by subject, so they work as a low-stakes entry point to a topic you are already studying.
• For general browsing: The humor section is one part of a much larger collection of worksheets, tables, and project instructions, not the site's main focus.

Can readers contribute their own jokes?

Yes. The site explicitly asks readers to "post a reply to tell your own science joke." That means the joke pages function partly as a shared collection rather than a closed, one-way list — you can add your own material in the replies.

Practical notes before you rely on it

• The site's own description of the humor section is brief; it does not state how many jokes each category contains or how often the collections are updated.
• The joke pages are separate from the site's worksheets, periodic tables, and project instructions, so if you need classroom materials rather than humor, look at those sections instead.
• No pricing or login requirement is mentioned in the available site information for this content, so treat access terms as unconfirmed rather than assuming the pages are unrestricted.