Tools & Wizards About Us
physics4kids.com screenshot

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

physics4kids.com

Rader's PHYSICS 4 KIDS.COM

Page Load Speed

1.1 sec in total

First Response

123 ms

Resources Loaded

637 ms

Page Rendered

329 ms

physics4kids.com screenshot

About Website

Click here to check amazing PHYSICS 4 KIDS content for United States. Otherwise, check out these important facts you probably never knew about physics4kids.com

Physics4Kids.com! The web site that teaches the basics of physics to everyone!

Visit physics4kids.com

Key Findings

We analyzed Physics4kids.com page load time and found that the first response time was 123 ms and then it took 966 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

physics4kids.com performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.9 s

100/100

10%

LCP (Largest Contentful Paint)

Value2.0 s

97/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value1,670 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.176

68/100

15%

TTI (Time to Interactive)

Value6.9 s

54/100

10%

Network Requests Diagram

physics4kids.com

123 ms

physics.css

58 ms

adsbygoogle.js

17 ms

brand

24 ms

main.jpg

235 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that 33% of them (9 requests) were addressed to the original Physics4kids.com, 19% (5 requests) were made to Googleads.g.doubleclick.net and 15% (4 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (235 ms) belongs to the original domain Physics4kids.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 18.1 kB (10%)

Content Size

173.3 kB

After Optimization

155.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Physics4kids.com main page is 173.3 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Images take 83.6 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 12.7 kB

  • Original 17.5 kB
  • After minification 16.6 kB
  • After compression 4.7 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 12.7 kB or 73% of the original size.

Image Optimization

-0%

Potential reduce by 283 B

  • Original 83.6 kB
  • After minification 83.3 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. PHYSICS 4 KIDS images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 74 B

  • Original 66.0 kB
  • After minification 66.0 kB
  • After compression 65.9 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-80%

Potential reduce by 5.0 kB

  • Original 6.3 kB
  • After minification 4.9 kB
  • After compression 1.3 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Physics4kids.com needs all CSS files to be minified and compressed as it can save up to 5.0 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (25%)

Requests Now

24

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of PHYSICS 4 KIDS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

physics4kids.com

physics4kids.com

123 ms

physics.css

physics.css

58 ms

adsbygoogle.js

adsbygoogle.js

17 ms

brand

brand

24 ms

main.jpg

main.jpg

235 ms

brand

brand

83 ms

ca-pub-9168758629909687.js

ca-pub-9168758629909687.js

71 ms

zrt_lookup.html

zrt_lookup.html

64 ms

show_ads_impl.js

show_ads_impl.js

77 ms

nextstop.png

nextstop.png

27 ms

quiz-physics.png

quiz-physics.png

28 ms

quiz-motion.png

quiz-motion.png

54 ms

30_help.gif

30_help.gif

54 ms

rnmlogo.gif

rnmlogo.gif

141 ms

logo_p4k.gif

logo_p4k.gif

62 ms

google_custom_search_watermark.gif

google_custom_search_watermark.gif

129 ms

ads

ads

130 ms

osd.js

osd.js

24 ms

ads

ads

206 ms

ads

ads

231 ms

abg.js

abg.js

25 ms

m_js_controller.js

m_js_controller.js

4 ms

favicon

favicon

66 ms

s

s

21 ms

googlelogo_color_112x36dp.png

googlelogo_color_112x36dp.png

54 ms

nessie_icon_tiamat_white.png

nessie_icon_tiamat_white.png

10 ms

x_button_blue2.png

x_button_blue2.png

12 ms

Accessibility Review

physics4kids.com accessibility score

74

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Form elements do not have associated labels

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

physics4kids.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

physics4kids.com SEO score

98

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Physics4kids.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Physics4kids.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

physics4kids.com

Open Graph description is not detected on the main page of PHYSICS 4 KIDS. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: