Worksheet Grade 3 Science

Pikestaff Ridge Snow and Ravensgate Creek: A Grade 3 Worksheet

A grade 3 worksheet using six months of invented snow-depth readings from a mountain ridge, with a scaled bar graph and questions about spring melt.

Objectives

  1. Students will draw a scaled bar graph of monthly snow depth using a five-centimeter scale.
  2. Students will find differences and totals from the snow-depth table.
  3. Students will explain why a creek rises in spring while snow on a ridge disappears.

Vocabulary

Snowpack
The snow that piles up in the mountains over the winter. As it melts in spring and summer, it acts like a giant water tank feeding rivers and reservoirs.

Also: depth, melt, creek, season, scale

Teacher overview

Snow that piles up on a ridge all winter is water in storage, and it feeds the creeks below when it melts in spring. This worksheet uses an invented set of snow-depth readings taken on the first of each month at a station on Pikestaff Ridge, together with two creek-depth readings from Ravensgate Creek. A misconception worth watching for is the idea that snow simply disappears, since students often say the snow "went away" without connecting it to the water rising in the creek below, so items 8 through 10 ask students to link the two sets of readings.

Answer Key

  1. Answer: 12 squares. 60 divided by 5 is 12.
  2. Answer: 9 squares. 45 divided by 5 is 9.
  3. Answer: 25 cm. 60 minus 35 is 25.
  4. Answer: 10 cm. 20 minus 10 is 10.
  5. Answer: February. Its bar is the tallest at 60 cm, above January at 45 cm.
  6. Answer: 125 cm. 20 plus 45 is 65, and 65 plus 60 is 125.
  7. Answer: 25 cm. 35 minus 10 is 25.
  8. Answer: It melted and ran downhill. Accept any answer stating that the snow turned to liquid water and flowed down the slope into the creek or into the ground. Answers saying only that the snow "went away" should be pushed one step further with a follow-up question.
  9. Answer: 32 cm. 62 minus 30 is 32.
  10. Answer: Melting snow feeds the creek. Accept any answer explaining that water from the melting snowpack runs downhill and joins the creek, so the creek carries more water in April while the ridge holds less snow.
  11. Answer: Winter. The deepest readings are February at 60 cm and January at 45 cm, in the middle of winter, while April and May are near zero.

Differentiation

Support

Give these students graph paper with the six month labels and the 5 cm scale already printed, and let them shade the bars rather than draw them. Assign items 1, 2, 3, 5, and 8. Provide a two-picture card showing a snowy ridge and a full creek so item 8 can be answered by pointing.

Extension

Have students predict the June and July depths for this fictional ridge and explain the prediction using the pattern in the table. Then ask them to sketch a second bar graph showing what the six months might look like on a ridge that gets half as much snow, keeping the same 5 cm scale.

ELL supports

Pre-teach "depth," "melt," and "ridge" using a ruler standing in a tray of crushed ice that melts during the lesson. Provide the frames "In ___ the snow was ___ cm deep" and "The snow melted, so the creek got ___." Allow items 8 and 10 to be answered with a labeled drawing.