https://www.khanacademy.org/science/grade-9-chemistry-snc-aligned/x22d5b83c2ea2dc38:empirical-data-collection-and-analysis/x22d5b83c2ea2dc38:si-units-in-chemistry/v/units-ms 2022-09-24T03:20:14.578649793Z Units The position and direction of motion an object has is described using units. In order to communicate this information scientists need to share which system of units they are using in order to understand the behavior of an object. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/fd2d719f-7dfa-44e0-b8e4-5e45139b55cf_1280_720_base.png Units The position and direction of motion an object has is described using units. In order to communicate this information scientists need to share which system of units they are using in order to understand the behavior of an object. https://cdn.kastatic.org/ka-youtube-converted/ID-ny-NOdxg.mp4/ID-ny-NOdxg.mp4 191 Scientific Investigations https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-2/x00110b31861f2508:measurement-of-length-and-motion/v/measuring-length-and-width-of-objects 2023-06-26T03:56:33.129173029Z Measuring length and width of objects Let's learn how to measure length and width of objects! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Measuring length and width of objects Let's learn how to measure length and width of objects! https://cdn.kastatic.org/ka-youtube-converted/SRD10rQJWYM.mp4/SRD10rQJWYM.mp4 247 Scientific Investigations https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-2/x00110b31861f2508:measurement-of-length-and-motion/v/correct-way-to-measure-length 2023-06-26T03:56:33.129173029Z Correct way to measure length Let's find out the correct way to measure length of objects! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Correct way to measure length Let's find out the correct way to measure length of objects! https://cdn.kastatic.org/ka-youtube-converted/I45BQxU1TnI.mp4/I45BQxU1TnI.mp4 190 Scientific Investigations https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:temperature-and-measurement/v/measuring-temperature 2025-05-18T06:30:48.900720574Z Measuring temperature Heat check? Science has the final say! Explore how we really measure hot, cold & everything in between! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Measuring temperature Heat check? Science has the final say! Explore how we really measure hot, cold & everything in between! https://cdn.kastatic.org/ka-youtube-converted/kdOzQf1ZRtk.mp4/kdOzQf1ZRtk.mp4 436 Scientific Investigations https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-2/x00110b31861f2508:measurement-of-length-and-motion/e/measurement 2025-08-05T04:58:10.215799082Z Physical quantities and the need for measurement LO1: Need for measurement.  LO2: Instruments used for measurement. Revathi exercise https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-3/x017c12e57b64cfa8:measurement/e/measurement-of-length-mass-time-and-temperature 2026-04-27T08:40:32.356784737Z Measurement of length, mass, time and temperature LO: Standard units of length, mass, time and measurement. Revathi exercise https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-3/x017c12e57b64cfa8:measurement/e/measurement-of-area-and-volume 2026-03-23T12:06:39.503602081Z Measuring area and volume LO: Measurement of area and volume Revathi exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:measuring-lengths/x0e04e0cb682fb793:measuring-lengths-volume-and-time/e/various-instruments-used-for-measurement 2026-05-11T04:40:42.021307954Z Instruments used for measurement LO: Various instruments used for measurement Revathi exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/dot-plot/v/ways-to-represent-data 2023-09-28T21:20:31.043533149Z Representing data Data can be represented in multiple ways such as tables, bar graphs, histograms, and frequency plots. These methods provide different perspectives of the same information, helping to answer various questions about the data. video https://cdn.kastatic.org/googleusercontent/unVIp0T_lWIuArwD1yNED8sczKhChLk1ua7jqhG7bArMm2ldzqbF8DxQ19bEs2TIU1wTqp-SQgPlEdE7ZIvlr1rk Representing data Data can be represented in multiple ways such as tables, bar graphs, histograms, and frequency plots. These methods provide different perspectives of the same information, helping to answer various questions about the data. https://cdn.kastatic.org/ka-youtube-converted/0ZKtsUkrgFQ.mp4/0ZKtsUkrgFQ.mp4 498 Scientific Investigations https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/dot-plot/v/frequency-tables-and-dot-plots 2023-09-21T21:49:35.177342261Z Frequency tables & dot plots Frequency tables and dot plots are handy tools in data representation. Frequency tables show how often each value appears, while dot plots provide a visual depiction of this information. These tools can be used to answer various questions about the data. video https://cdn.kastatic.org/googleusercontent/RTmZSOuObansKIGZstspTCZdDsK7hQotkInO0EY7aho0mYfzmP02kc60pg4x3tasvcfU582qmcD7yX2jyicPOKE Frequency tables & dot plots Frequency tables and dot plots are handy tools in data representation. Frequency tables show how often each value appears, while dot plots provide a visual depiction of this information. These tools can be used to answer various questions about the data. https://cdn.kastatic.org/ka-youtube-converted/gdE46YSedvE.mp4/gdE46YSedvE.mp4 439 Scientific Investigations https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/dot-plot/e/creating-frequency-tables 2025-02-27T11:46:16.621461116Z Creating frequency tables Practice creating frequency tables from small data sets. Ben S. exercise https://www.khanacademy.org/math/cc-2nd-grade-math/x3184e0ec:data/cc-2nd-bar-graphs/v/creating-bar-charts-1 2021-05-05T14:35:07Z Creating a bar graph Sal creates a bar chart using data from a survey. Sal Khan video https://cdn.kastatic.org/googleusercontent/E0AWW1iFtXR08RRnhDtWKXVAp88_1mtoSX7Bw2g-oQujU0SRwOp7h174eovVW2f-sDEHJOO_tX9bdl7SPP7ovdx- Creating a bar graph Sal creates a bar chart using data from a survey. https://cdn.kastatic.org/ka-youtube-converted/woUQ9LLaees.mp4/woUQ9LLaees.mp4 67 Scientific Investigations https://www.khanacademy.org/math/cc-third-grade-math/represent-and-interpret-data/imp-bar-graphs/e/creating_bar_charts_1 2026-03-24T23:41:07.080866137Z Create bar graphs Create a bar graph with the data given. Ben Eater exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/histograms/v/histograms-intro 2021-07-01T17:39:48Z Creating a histogram A histogram is a graphical display of data using bars of different heights. In a histogram, each bar groups numbers into ranges. Taller bars show that more data falls in that range. A histogram displays the shape and spread of continuous sample data.  video https://cdn.kastatic.org/googleusercontent/RhHZWxwp22klKK7rm1TFYt9jpKrXxJkTLB4FLjHfv8LJ0AgOm6QxlTjAInvDKvKnBD3Zor4r_GAwsRFpJ_P1TvQ Creating a histogram A histogram is a graphical display of data using bars of different heights. In a histogram, each bar groups numbers into ranges. Taller bars show that more data falls in that range. A histogram displays the shape and spread of continuous sample data.  https://cdn.kastatic.org/ka-youtube-converted/gSEYtAjuZ-Y.mp4/gSEYtAjuZ-Y.mp4 442 Scientific Investigations https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/histograms/e/creating-histograms 2026-05-06T05:31:17.506778064Z Create histograms Practice creating histograms. Ben Stenhaug exercise