By the end of fourth grade, students will develop an understanding of change, constancy and measurement. Students write a hypothesis about the effect of viscosity on the amount of time it takes a marble to fall through a liquid and design a controlled experiment to test their hypothesis. Students perform their experiment, record data, and state a conclusion. Students will complete the Process Skills blackline master on Lab Manual pages 111-112 as they do the activity. Students observe and measure the water levels when 5 marbles and 10 marbles are placed in 20 mL of water.
Students then test their predictions.
Students will complete the Process Skills blackline master on Lab Manual pages 99-100 as they do the activity. Students use gram cubes to estimate the mass of small classroom objects. Then students use a balance to measure the mass of the objects. Finally, students compare their estimates with the actual masses of the objects and determine the accuracy of their estimates. Students will complete the Process Skills blackline master on Lab Manual pages 95-96 as they do the activity.