What causes the tides
Grade 6 Science Worksheet
Circle the best answer.
High tide at Esme's dock is at 9:00 a.m. on Monday. Tide times come about 50 minutes later each day. About when is that high tide on Wednesday?
- 9:50 a.m.
- 9:00 a.m.
- 10:40 a.m.
- 7:20 a.m.
High tide at Jun's pier is at 4:15 p.m. on Tuesday. Tide times come about 50 minutes later each day. About when is that high tide on Friday?
- 5:05 p.m.
- 1:45 p.m.
- 4:15 p.m.
- 6:45 p.m.
High tide at Luz's harbor is at 8:20 p.m. on Thursday. Tide times come about 50 minutes later each day. About when is that high tide on Sunday?
- 5:50 p.m.
- 10:50 p.m.
- 9:10 p.m.
- 8:20 p.m.
Read this first
Table (example data)
Day 1, high 2.4 m, low 1.2 m. Day 2, high 2.3 m, low 0.2 m. Day 3, high 2.0 m, low 0.1 m.
Milo compares three days of tides. Which day had the greatest tidal range (high tide minus low tide)?
- Day 2, with a range of 2.5 m, found by adding the high of 2.3 and the low of 0.2.
- Day 3, because its low tide was the lowest number in the whole table.
- Day 2, with a range of 2.1 m, found by subtracting 0.2 from 2.3.
- Day 1, because its high tide was the highest of the three days.
Table (example data)
Day 1, high 1.7 m, low 0.2 m. Day 2, high 2.6 m, low 1.5 m. Day 3, high 2.4 m, low 0.4 m.
Noah compares three days of tides at a bay. Which day had the greatest tidal range (high tide minus low tide)?
- Day 3, with a range of 2.8 m, found by adding the high of 2.4 and the low of 0.4.
- Day 2, because its high tide was the highest reading on the chart.
- Day 1, because its low tide was the lowest reading that week.
- Day 3, with a range of 2.0 m, found by subtracting 0.4 from 2.4.
Table (example data)
Day 1, high 2.4 m, low 0.6 m. Day 2, high 2.9 m, low 2.0 m. Day 3, high 1.9 m, low 0.4 m.
Pia compares three days of tides at a river mouth. Which day had the greatest tidal range (high tide minus low tide)?
- Day 1, with a range of 1.8 m, found by subtracting 0.6 from 2.4.
- Day 3, because its low tide was the smallest reading among the days listed.
- Day 1, with a range of 3.0 m, found by adding the high of 2.4 and the low of 0.6.
- Day 2, because its high tide was the tallest one shown in the bay table.
Table (example data)
Day 1, high 2.0 m, low 0.1 m. Day 2, high 2.6 m, low 0.4 m. Day 3, high 2.9 m, low 2.0 m.
Ren compares three days of tides at a harbor. Which day had the greatest tidal range (high tide minus low tide)?
- Day 2, with a range of 3.0 m, found by adding the high of 2.6 and the low of 0.4.
- Day 1, because its low tide was the lowest of the group.
- Day 2, with a range of 2.2 m, found by subtracting 0.4 from 2.6.
- Day 3, because its high tide was the highest one recorded at the harbor.
Table (example data)
Day 1, new moon, range 2.5 m. Day 8, first quarter, range 1.1 m. Day 15, full moon, range 2.4 m. Day 22, third quarter, range 1.2 m.
Tala reads a Moon calendar with tidal ranges. Day 30 is a new moon. What range should the club expect?
- A large range, about 2.4 to 2.5 m, like earlier new moons.
- A small range, about 1.1 to 1.2 m, like the earlier quarter moons.
- A middle range, about 1.8 m, halfway between the big and small values.
- No way to tell, because the ranges change at random.
Zee's boat club wants the day with the smallest tidal range. Using the table, which days should the club pick?
- Day 11, halfway between the full moon and a quarter moon.
- Day 8 or Day 22, which are the quarter moons in the table.
- Any day, because the range changes at random from one day to the next.
- Day 1 or Day 15, which are the new moon and the full moon.
Ari studies the Moon calendar of tidal ranges. Which statement does the table support?
- The ranges are larger near new and full moons than near the quarter moons.
- The ranges show no pattern, because they go up and down.
- The ranges are larger near the quarter moons than near new and full moons.
- The ranges are largest halfway between the Moon's phases.