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Middle school students implementing the activity: ( A ) participants diggin...
Published: 01 May 2021
Figure 2. Middle school students implementing the activity: ( A ) participants digging a soil pit in their study area; ( B ) a group of students preparing a mustard solution to collect earthworms from the bottom layers of the soil; ( C ) a student preparing the setup to measure soil pH. More
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Phylogenetic relationships of grass family members (from  Li & Brutnell...
Published: 01 May 2021
Figure 1. Phylogenetic relationships of grass family members (from Li & Brutnell, 2011 ). More
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A simple, inexpensive aquarium CO 2  reactor can be used to quickly make CO...
Published: 01 May 2021
Figure 2. A simple, inexpensive aquarium CO 2 reactor can be used to quickly make CO 2 bubbles to acidify a solution. Squeezing the bottle of citric acid will force the fluid into the sodium bicarbonate, liberating CO 2 that can be controlled and released through a diffuser into the Chara con... More
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( A ) Measuring plant height. ( B ) Counting tillers. ( C )Examining  S. vi...
Published: 01 May 2021
Figure 4. ( A ) Measuring plant height. ( B ) Counting tillers. ( C )Examining S. viridis morphology. More
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Stages of the soil experiment. The students choose everyday materials and f...
Published: 01 May 2021
Figure 2. Stages of the soil experiment. The students choose everyday materials and formulate hypotheses regarding their visible impacts after soil exposure. Then they place the samples in a jar, keep them moist, and analyze the samples to confirm or refute their hypotheses. More
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Chara  under a dissecting scope: (top)  Chara  grown at pH 5.5–6.5; (bottom...
Published: 01 May 2021
Figure 3. Chara under a dissecting scope: (top) Chara grown at pH 5.5–6.5; (bottom) Chara grown at pH 7.5–8. More
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Three similar biodegradable “plastic” films made of glycerin, starch, and w...
Published: 01 May 2021
Figure 3. Three similar biodegradable “plastic” films made of glycerin, starch, and water as alternatives to conventional plastics. Students can use their films at home and investigate their degradation in another experiment (see Figure 2 ). More
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Students dramatize active transport with Na + –K +  pump. The student in th...
Published: 01 May 2021
Figure 2. Students dramatize active transport with Na + –K + pump. The student in the middle is the Na + –K + pump, red placards are plasma membrane, the white placard is ATP, yellow circles are Na + ions, and pink circles are K + ions. The pieces of rope are K + binding sites on the left sid... More
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( A ) Planting. ( B ) Arrangement of pots in a tray. ( C )  Tray layout und...
Published: 01 May 2021
Figure 3. ( A ) Planting. ( B ) Arrangement of pots in a tray. ( C ) Tray layout under the light bank. More
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Comparison of percent responses in the “initiation” category by student gro...
Published: 01 May 2021
Figure 4. Comparison of percent responses in the “initiation” category by student groups based on responses to the “bond breaking and forming” category (group 1 = correct or incomplete correct; group 2 = partial, incomplete incorrect, or incorrect). More
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Eudiometer setup that uses volume of water displaced to indicate the amount...
Published: 01 May 2021
Figure 4. Eudiometer setup that uses volume of water displaced to indicate the amount of CaCO3 present in Chara at different pH. More
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