Education | NIST

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class="text-long"> <figure class="nist-image"><img alt="Color graphic that displays a robotic arm, line graph, microscope, and lab setup" height="888" loading="lazy" src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/images/2021/12/06/EducationOutreach_IdentifierGraphic_Version4_3%20Panel_Full%20Scene.png" typeof="foaf:Image" width="2886"><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure> </div> </div> </div> <div class="nist-content-row nist-content-row--width-full paragraph paragraph--type--text-bg-color paragraph--view-mode--default"> <div class="nist-content-row__inner"> <div class="text-long"> <div class="nist-blog-header "> <div class="nist-blog-header__bkgrd"> <div class="nist-blog-header__main grid-container"> <div class="grid-row"> <h1 class="nist-blog-header__title">Education</h1> </div> </div> </div> </div> </div> </div> </div> <div class="nist-content-row 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Technical standards keep us safe, enable technology to advance, and help businesses succeed. They quietly make the modern world tick and prevent technological problems. Inside these pages and in our registry, you will find information about standards and measurements that can enrich your educational experiences. You can also find out more about the educational opportunities we provide for students, teachers and lifelong learners. Happy exploring.</p> </div> </div> </div> <div class="nist-content-row nist-content-row--width-full paragraph paragraph--type--text-bg-color paragraph--view-mode--default"> <div class="nist-content-row__inner"> <div class="text-long"> <div class="grid-container"> <div class="grid-row grid-gap-2 margin-top-4"> <div class="nist-card tablet:grid-col-3"> <div class="nist-card__inner nist-card__inner--blue padding-3"> <div class="nist-card__image"><svg height="100px" id="Layer_1" version="1.1" viewbox="0 0 64 65" width="150px" x="0" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" y="0"><title id="magTitle"></title><desc id="magDesc">Magnifying Glass Icon</desc><style type="text/css"> <![CDATA[/* ><!]]>*/ </style><metadata></metadata><path class="st01" d="M56.3 6.9c-9.1-8.8-23.6-8.5-32.4.6-7.2 7.5-8.5 19-3 27.9L2.3 54.9c-2.2 2.3-2.1 5.9.2 8 2.3 2.1 5.8 2.1 8-.2l18.7-19.4c11 6.2 25 2.4 31.2-8.6 5.1-9.1 3.4-20.6-4.1-27.8zM27.7 36.6c-7.3-7-7.5-18.6-.5-25.9s18.6-7.5 25.9-.5c7.3 7 7.5 18.6.5 25.9-7 7.3-18.6 7.5-25.9.5z" id="Path_62"></path></svg></div> <div class="nist-card__title text-center padding-y-3"> <h3>NEST-R Resource Registry</h3> </div> <a class="usa-button usa-button--blue" href="https://web.archive.org/web/20230130111638/https://nestr.nist.gov/">Learn More</a></div> </div> <div class="nist-card tablet:grid-col-3"> <div class="nist-card__inner nist-card__inner--red padding-3"> <div class="nist-card__image"><svg height="100px" id="Layer_1" version="1.1" viewbox="0 0 49 76" width="150px" x="0" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" y="0"><title id="kiloTitle"></title><desc id="kiloDesc">Kilogram Icon</desc><style type="text/css"> <![CDATA[/* ><!]]>*/ </style><metadata></metadata><path class="st02" d="M48.6 30c.1-4.6-2.6-6.4-4.9-7.2-2.2-.7-4.5-1.3-6.6-1.8l-1.5-.4c-1.3-.6-2.3-1.6-2.8-3-.1-1 .1-1.8 1.6-2.4C35.5 14.7 39 13 39 9c0-2.8-1.6-5-4.9-6.3C28.2 0 21.4 0 15.4 2.6c-3.2 1.4-4.9 3.4-5 6.2-.2 4.2 3.5 5.9 4.7 6.5 1.5.7 1.8 1.5 1.7 2.5-.1.9-1.6 2.5-2.9 2.8-2.7.7-5.8 1.4-8.8 2.5-2.9 1-4.4 3.3-4.3 6.5.1 4.2.1 8.5.1 12.7V64.5c0 4.9 1.1 6.4 5.6 8.2 1 .4 2 .7 3 .9 4.7 1.2 9.6 1.8 14.5 1.7 2.7 0 5.4-.2 8.1-.4 3.7-.5 7.3-1.3 10.8-2.4l1.1-.3c1.8-.5 4.7-2.1 4.7-6.9-.2-12.8-.2-24.4-.1-35.3zm-4.8 35.4c0 1.9-.6 2-1.2 2.2l-1.1.3c-3.3 1-6.6 1.8-10 2.2-7 .9-14 .5-20.9-1.2-.8-.2-1.6-.5-2.4-.8-2.5-1-2.5-1-2.5-3.7V42.3c0-4.2 0-8.5-.1-12.8 0-1.4.4-1.7 1.1-1.9 2.6-.9 5.2-1.6 8.4-2.4 3-.7 6.3-3.8 6.5-7.2.2-3.1-1.6-6-4.5-7.1-2-.9-2-1.5-1.9-1.9 0-.4 0-1.1 2.1-2 2.3-1 4.9-1.6 7.4-1.6 2.6 0 5.1.6 7.5 1.6 2 .9 2 1.5 2 2 0 .4 0 1-1.9 1.8-2.9 1.2-4.7 4.2-4.3 7.3.4 3.2 3.7 6.4 6.3 7.1l1.5.4c2.1.5 4.3 1.1 6.3 1.7 1.1.4 1.6.8 1.6 2.5 0 11.1 0 22.7.1 35.6z"></path><path class="st0" d="M22.9 38.7h-2.5l-3.6 8h-.1v-8h-2.5v17.4h2.5v-5.2l1.3-2.5 2.9 7.7h2.6l-4-10.4z"></path><path class="st0" d="M30.8 48.7h2V52c0 .5-.1 1-.5 1.3-.7.6-1.7.6-2.4 0-.4-.3-.5-.8-.5-1.3v-9.2c0-.5.1-1 .5-1.3.7-.6 1.7-.6 2.4 0 .4.3.5.8.5 1.3v.9h2.5v-.9c0-.6-.1-1.3-.4-1.9-.2-.5-.5-1-1-1.3-1.2-1-2.9-1.3-4.4-.8-.5.2-.9.4-1.3.8s-.7.8-1 1.3c-.3.6-.4 1.2-.4 1.9V52c0 .6.1 1.3.4 1.9.2.5.6.9 1 1.3s.8.6 1.3.8c1 .4 2 .4 3 0 .5-.2 1-.5 1.4-.8.4-.4.7-.8 1-1.3.3-.6.4-1.2.4-1.9v-5.5h-4.5v2.2z"></path></svg></div> <div class="nist-card__title text-center padding-y-3"> <h3>Metric Program</h3> </div> <a class="usa-button usa-button--red" href="https://web.archive.org/web/20230130111638/https://www.nist.gov/pml/weights-and-measures/metric-si/si-education-training">Learn More</a></div> </div> <div class="nist-card tablet:grid-col-3"> <div class="nist-card__inner nist-card__inner--green padding-3"> <div class="nist-card__image"><svg height="100px" id="Layer_1" version="1.1" viewbox="0 0 62 62" width="150px" x="0" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" y="0"><title id="commentTitle"></title><desc id="commentDesc">Comment Icon</desc><style type="text/css"> <![CDATA[/* ><!]]>*/ </style><metadata></metadata><path class="st03" d="M59.1 1H2.9C1.7 1 .6 2 .6 3.2v38c0 1.3 1 2.3 2.2 2.3h22.8v13.8c0 .9.5 1.7 1.3 2.1.3.2.7.2 1 .2.5 0 1.1-.2 1.5-.5L48 43.5h11.1c1.3 0 2.3-1 2.3-2.2v-38C61.4 2 60.3 1 59.1 1zm-2.3 38h-9.6c-.5 0-1.1.2-1.5.5L30.2 52.4V41.3c0-1.3-1-2.3-2.2-2.3H5.2V5.6h51.5l.1 33.4z" id="Path_63"></path></svg></div> <div class="nist-card__title text-center padding-y-3"> <h3>Experiential Learning Opportunities</h3> </div> <a class="usa-button usa-button--green" href="https://web.archive.org/web/20230130111638/https://www.nist.gov/iaao/academic-affairs-office">Learn More</a></div> </div> <div class="nist-card tablet:grid-col-3"> <div class="nist-card__inner nist-card__inner--brown padding-3"> <div class="nist-card__image"><svg height="100px" id="Layer_1" version="1.1" viewbox="0 0 38 70" width="150px" x="0" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" y="0"><title id="lightTitle"></title><desc id="lightDesc">Lightning Bolt Icon</desc><style type="text/css"> <![CDATA[/* ><!]]>*/ </style><metadata></metadata><g id="Group_362" transform="translate(-648.462 -48.491)"><g id="Group_357"><path class="st04" d="M650.3 117.8c.9.5 2 .2 2.6-.6l32.4-44.6c.7-.9.5-2.2-.5-2.8-.3-.3-.8-.4-1.2-.4H675L685.4 52c.6-1 .3-2.2-.7-2.8-.3-.2-.7-.3-1-.3h-24.3c-.9 0-1.7.6-2 1.5L649.3 83c-.3 1.1.4 2.2 1.5 2.5.2 0 .3.1.5.1h9.2l-11.1 29.8c-.4.8 0 1.9.9 2.4zm15-33.6c.4-1-.1-2.2-1.2-2.6-.2-.1-.5-.1-.7-.1h-9.6l7.1-28.5H680l-10.3 17.3c-.6 1-.3 2.2.7 2.8.3.2.7.3 1 .3h8.2l-21.3 29.4 7-18.6z" id="Path_56"></path></g></g></svg></div> <div class="nist-card__title text-center padding-y-3"> <h3>K-12 Curriculum Materials</h3> </div> <a class="usa-button usa-button--brown" href="https://web.archive.org/web/20230130111638/https://www.nist.gov/kids/resources-parents-teachers-and-students">Learn More</a></div> </div> </div> </div> </div> </div> </div> <div class="nist-content-row nist-content-row--width-full paragraph paragraph--type--text-bg-color paragraph--view-mode--default"> <div class="nist-content-row__inner"> <div class="text-long"> <div class="grid-container padding-y-4"> <div class="nist-region-heading nist-region-heading--red"> <h2>Meet the SI Superheroes</h2> </div> <div class="grid-row grid-gap"> <div class="tablet:grid-col"> <figure class="align-center nist-video" data-media-id="609071"><div class="video-embed-field"><div class="video-embed-field-lazy" data-video-embed-field-lazy="<div class="video-embed-field-provider-nist-kaltura video-embed-field-responsive-video"><iframe width="854" height="480" frameborder="0" allow="autoplay *; fullscreen *; encrypted-media *" allowfullscreen="allowfullscreen" src="https://www.kaltura.com/p/684682/sp/68468200/embedIframeJs/uiconf_id/31013851/partner_id/684682?iframeembed=true&amp;entry_id=1_6uxxwjil?iframeembed=true&amp;entry_id=1_6uxxwjil&amp;flashvars%5BautoPlay%5D=1"></iframe> </div> "><img alt="League of SI Superheroes Episode 4: Two Truths & a Lie" loading="lazy" src="https://web.archive.org/web/20230130111638im_/https://cdnsecakmi.kaltura.com/p/684682/sp/68468200/thumbnail/entry_id/1_6uxxwjil/width/1280" typeof="foaf:Image"><button class="video-embed-field-lazy-play"></button> <div class="video-embed-field-lazy-title">League of SI Superheroes Episode 4: Two Truths & a Lie</div> </div> </div> <figcaption class="nist-video__caption" data-caption-editable="true"></figcaption></figure><div class="nist-meter"> <figure class="nist-image"><img alt="Meterman" height="220" loading="lazy" src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/220_x_220_limit/public/images/2021/12/06/meter-man.png?itok=68R5xH8T" typeof="foaf:Image" width="220"><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure></div> </div> <div class="tablet:grid-col"> <h3>Who are your SI Superheroes?</h3> <div class="nist-candela"> <figure class="nist-image"><img alt="candela" height="220" loading="lazy" src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/220_x_220_limit/public/images/2021/12/06/candela.png?itok=CNcC5J0I" typeof="foaf:Image" width="220"><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure></div> <p class="padding-right-2">Emerging from their environmentally shielded world headquarters at NIST, the SI superheroes are dedicated to the fight against uncertainty, imprecision, and inaccuracy and to improving the quality of our lives and the things we build.</p> <ul><li><a data-entity-substitution="canonical" data-entity-type="media" data-entity-uuid="c7b23e46-30fd-4e62-bdf0-3d689fa6607c" href="/web/20230130111638/https://www.nist.gov/video/league-si-superheroes-episode-4-two-truths-lie" media_library="Media Library" title="League of SI Superheroes Episode 4: Two Truths & a Lie" class="media-link-ga " data-file-url="/video/league-si-superheroes-episode-4-two-truths-lie">Episode 4: Two Truths and a Lie</a></li> <li><a data-entity-substitution="canonical" data-entity-type="media" data-entity-uuid="7786cc47-7a35-4f61-9c2b-9a6440fe4445" href="/web/20230130111638/https://www.nist.gov/video/mass-hysteria" media_library="Media Library" title="Mass Hysteria" class="media-link-ga " data-file-url="/video/mass-hysteria">Episode 3: Mass Hysteria</a></li> <li><a data-entity-substitution="canonical" data-entity-type="media" data-entity-uuid="3d6c5b4b-7a76-4c84-a1c7-201e17cbea2f" href="/web/20230130111638/https://www.nist.gov/video/running-out-time" media_library="Media Library" title="Running Out of Time!" class="media-link-ga " data-file-url="/video/running-out-time">Episode 2: Running Out of Time!</a></li> <li><a data-entity-substitution="canonical" data-entity-type="media" data-entity-uuid="5a631b74-d38b-498e-9b2b-1af838df7838" href="/web/20230130111638/https://www.nist.gov/video/desperate-measures" media_library="Media Library" title="Desperate Measures!" class="media-link-ga " data-file-url="/video/desperate-measures">Episode 1: Desperate Measures!</a></li> </ul><p><a class="usa-button usa-button--outline" href="https://web.archive.org/web/20230130111638/https://www.nist.gov/kids/meet-measurement-league">Learn More</a></p> <div class="nist-prodsec"> <figure class="nist-image"><img alt="proffsec" height="220" loading="lazy" src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/220_x_220_limit/public/images/2021/12/06/proffsec.png?itok=AvABCynB" typeof="foaf:Image" width="220"><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure></div> </div> </div> </div> </div> </div> </div> <div class="nist-content-row nist-content-row--width-full paragraph paragraph--type--text-bg-color paragraph--view-mode--default"> <div class="nist-content-row__inner"> <div class="text-long"> <div class="grid-container padding-top-9"> <div class="nist-region-heading"> <h2>Featured Collections</h2> </div> <p>Check out the resources NIST has to offer in these areas. And make sure to come back next month to check out resources in other collections.</p> </div> </div> </div> </div> <div class="grid-container margin-y-4"> <div class="grid-row grid-gap-2"> <div class="nist-card tablet:grid-col-4 nist-card-bg nist-card-bg--accent-cool"> <div class="nist-card__inner"> <div class="nist-card__image"> <a href="https://web.archive.org/web/20230130111638/https://nestr.nist.gov/explore/keyword/results-redirect?id=63376e7ca5b36a360db110b2"> <div class="entity-reference"> <img src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/700_x_700_limit/public/images/2022/10/03/Tape%20measure.jpg?itok=awZLVTyj" width="700" height="390" alt="blue backgrond with a coiled yellow metric tape measure" loading="lazy" typeof="foaf:Image"/> </div> </a> </div> <div class="nist-card__title padding-y-7"> <h3> Metric System </h3> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="https://web.archive.org/web/20230130111638/https://nestr.nist.gov/explore/keyword/results-redirect?id=63376e7ca5b36a360db110b2" class="usa-button usa-button--outline usa-button--inverse"> Learn More </a> </div> </div> </div> </div> <div class="nist-card tablet:grid-col-4 nist-card-bg nist-card-bg--primary"> <div class="nist-card__inner"> <div class="nist-card__image"> <a href="https://web.archive.org/web/20230130111638/https://nestr.nist.gov/explore/keyword/results-redirect?id=61ae7034304f606e4f36addf"> <div class="entity-reference"> <img src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/700_x_700_limit/public/images/2021/12/06/fireresearch.png?itok=SWspqiMO" width="700" height="391" alt="Forest burning" loading="lazy" typeof="foaf:Image"/> </div> </a> </div> <div class="nist-card__title padding-y-7"> <h3> Fire Research </h3> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="https://web.archive.org/web/20230130111638/https://nestr.nist.gov/explore/keyword/results-redirect?id=61ae7034304f606e4f36addf" class="usa-button usa-button--outline usa-button--inverse"> Learn More </a> </div> </div> </div> </div> <div class="nist-card tablet:grid-col-4 nist-card-bg nist-card-bg--secondary"> <div class="nist-card__inner"> <div class="nist-card__image"> <a href="https://web.archive.org/web/20230130111638/https://nestr.nist.gov/explore/keyword/results-redirect?id=61ae6ffd304f606e4f36adde"> <div class="entity-reference"> <img src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/700_x_700_limit/public/images/2021/12/06/environment.png?itok=3WwlQi6V" width="700" height="390" alt="Large Trees" loading="lazy" typeof="foaf:Image"/> </div> </a> </div> <div class="nist-card__title padding-y-7"> <h3> Environment </h3> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="https://web.archive.org/web/20230130111638/https://nestr.nist.gov/explore/keyword/results-redirect?id=61ae6ffd304f606e4f36adde" class="usa-button usa-button--outline usa-button--inverse"> Learn More </a> </div> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--topic-featured paragraph--view-mode--default nist-content-row--width-full bg-base-lightest margin-y-5"> <div class="grid-container"> <div class="nist-card nist-card--horizontal nist-card--horizontal-full nist-card--base-lightest"> <div class="nist-card__inner"> <div class="nist-card__image"> <a href="/web/20230130111638/https://www.nist.gov/feature-stories/why-you-need-standards"> <div class="entity-reference"> <figure class="nist-image"> <img src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/800w_x_400h/public/images/2021/12/06/Rubble_of_the_Great_Baltimore_Fire_Sepia.png?itok=LMC2ouMD" width="800" height="400" alt="Rubble of great Baltimore Fire" loading="lazy" typeof="foaf:Image"/> <figcaption class="nist-image__caption"> <div data-caption-editable="true" class="nist-image__caption-content"> </div> </figcaption> </figure> </div> </a> </div> <div class="nist-card__title"> <h3> Why do Standards Matter? </h3> </div> <div class="nist-card__content"> <div class="text-long"><p>Why do standards matter? Take fire hydrants. If you ever have had to call 911 to report a fire, you don’t have to worry about the hoses that firefighters bring when they arrive.</p> <p>But that wasn’t the case in the Great Baltimore Fire of 1904, which burned for more than a day and destroyed 1,500 buildings. Starting on a quiet Sunday morning, the fire spread quickly and overwhelmed the city’s ability to fight it alone. Fire companies from New York, Philadelphia, Wilmington, Harrisburg and elsewhere swiftly rushed in to help. They had more than enough water and people to fight the fire, but there was a problem: Most of their fire hoses wouldn’t fit the hydrants, prolonging the fire to 30 hours and damaging an area the size of 70 blocks in the city’s business district.</p></div> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="/web/20230130111638/https://www.nist.gov/feature-stories/why-you-need-standards" class="usa-button ">Read more about why you need standards</a> </div> </div> </div> </div> </div> </div> <div class="nist-content-row nist-content-row--width-full paragraph paragraph--type--text-bg-color paragraph--view-mode--default"> <div class="nist-content-row__inner"> <div class="text-long"> <div class="grid-container padding-top-5"> <div class="nist-region-heading"> <h2>How Do You Measure It?</h2> </div> <p class="width-desktop">Much of the world around us would be a mystery without good measurements. Whether it’s the depth of the ocean, the nutrients in your cereal, or the age of dinosaur fossils, measurements enable us to learn about our world and make good decisions about what to do in everyday life. In our “How Do You Measure It?” web series, we answer questions that will help you better understand how our modern world works — and why good measurements play an important role in your life.</p> <p>See a few examples below</p> <div class="grid-row grid-gap-2"> <div class="nist-card tablet:grid-col-4 nist-card--topic"> <div style="background-color: #6a82fb"> <div class="nist-card__image" style="background-color: #6a82fb"> <div class="entity-reference"> <figure class="align-center nist-image--lightbox nist-image" data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/2021/10/29/HDYMI_Banners_Time_Langing_Page.png?itok=fPcJ399a" data-link="/node/1685661" data-media-id="627086"><a href="/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-we-measure-time"><img alt="Illustration shows a clock, waves moving through dots, and the word "TIME."" height="1610" loading="lazy" src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/images/2021/10/29/HDYMI_Banners_Time_Langing_Page.png" typeof="foaf:Image" width="3223"></a><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure></div> </div> <div class="nist-card__content display-flex flex-column"> <h2 class="nist-card__title padding-bottom-5 text-align-center"><a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="fd8ab91e-28c4-4290-b7aa-81dd791e3575" href="/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-we-measure-time" media_library="Media Library" style="color: #fff;" title="How Do We Measure Time?">How Do We Measure Time?</a></h2> <div class="nist-card__links flex-align-self-center"> <div class="nist-card__button"><a class="usa-button usa-button--outline usa-button--inverse" data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="fd8ab91e-28c4-4290-b7aa-81dd791e3575" href="/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-we-measure-time" media_library="Media Library" title="How Do We Measure Time?">See Answer</a></div> </div> </div> </div> </div> <div class="nist-card tablet:grid-col-4 nist-card--topic"> <div style="background-color: #c3ede1"> <div class="nist-card__image" style="background-color: #c3ede1"> <div class="entity-reference"> <figure class="align-center nist-image" data-link="/node/1672316"><a href="/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-smoke-detectors-work"><img alt="Animated illustration of kitchen appliances showing toast popping up and soundwaves coming from smoke alarm is labeled "HDYMI? Detecting Smoke."" height="699" loading="lazy" src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/1400_x_1400_limit/public/images/2021/07/01/HWDY_Banners-landing%20page-crop.png?itok=kTHfJyPu" typeof="foaf:Image" width="1400"></a><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure></div> </div> <div class="nist-card__content display-flex flex-column"> <h2 class="nist-card__title padding-bottom-5 text-align-center"><a href="https://web.archive.org/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-smoke-detectors-work">How Do Smoke Alarms Detect Fires? </a></h2> <div class="nist-card__links flex-align-self-center"> <div class="nist-card__button"><a class="usa-button usa-button--outline" href="https://web.archive.org/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-smoke-detectors-work">See Answer</a></div> </div> </div> </div> </div> <div class="nist-card tablet:grid-col-4 nist-card--topic"> <div style="background-color: #D4E6E8"> <div class="nist-card__image" style="background-color: #D4E6E8"> <div class="entity-reference"> <figure class="align-center nist-image" data-link="/node/1654511"><a href="/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-you-measure-depth-ocean"><img alt="Ocean Depth Banner Image" height="699" loading="lazy" src="/web/20230130111638im_/https://www.nist.gov/sites/default/files/styles/1400_x_1400_limit/public/images/2021/03/25/HDYMI-landingpage-ocean-crop-new.png?itok=6RthUelB" typeof="foaf:Image" width="1400"></a><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure></div> </div> <div class="nist-card__content display-flex flex-column"> <h2 class="nist-card__title padding-bottom-5 text-align-center"><a href="https://web.archive.org/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-you-measure-depth-ocean">How Do You Measure the Depth of the Ocean?</a></h2> <div class="nist-card__links flex-align-self-center"> <div class="nist-card__button"><a class="usa-button usa-button--outline" href="https://web.archive.org/web/20230130111638/https://www.nist.gov/how-do-you-measure-it/how-do-you-measure-depth-ocean">See Answer</a></div> </div> </div> </div> </div> </div> <p class="text-align-center"><a class="usa-button" data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="7ea5c8ed-9467-447d-bdcb-67b9573d4a56" href="/web/20230130111638/https://www.nist.gov/how-do-you-measure-it" media_library="Media Library" title="How Do You Measure It?">View full series</a></p> </div> </div> </div> </div> </div> </div> <div data-elastic-exclude>  <footer class="nist-footer padding-bottom-4"> <div class="grid-container nist-footer__info"> <div class="grid-row"> <div 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