What causes the tides

Grade 6 Science Worksheet - Challenge Me

Circle the best answer.

1. 1.

   High tides at Esme's dock on Monday are at 3:10 a.m. and 3:35 p.m. Tide times come about 50 minutes later each day. When are the two high tides on Wednesday?

   • 4:50 a.m. and 5:15 p.m.
   • 4:00 a.m. and 4:25 p.m.
   • 1:30 a.m. and 1:55 p.m.
   • 3:10 a.m. and 3:35 p.m.
2. 2.

   High tides at Jun's harbor on Wednesday are at 6:40 a.m. and 7:05 p.m. Tide times come about 50 minutes later each day. When are the two high tides on Friday?

   • 5:00 a.m. and 5:25 p.m.
   • 7:30 a.m. and 7:55 p.m.
   • 6:40 a.m. and 7:05 p.m.
   • 8:20 a.m. and 8:45 p.m.
3. 3.

   High tides at Kira's beach on Friday are at 1:20 a.m. and 1:45 p.m. Tide times come about 50 minutes later each day. When are the two high tides on Sunday?

   • 3:00 a.m. and 3:25 p.m.
   • 11:40 p.m. and 12:05 p.m.
   • 1:20 a.m. and 1:45 p.m.
   • 2:10 a.m. and 2:35 p.m.
4. 4.

   Milo's class wants to test whether the Moon's phase changes the tidal range at the town dock. Which plan is best?

   • Measure the water height each hour at the dock for a month and note the wind each day.
   • Measure the water height each hour at the dock for a month and note the Moon's phase.
   • Measure the water height at a different beach each day for a month and note the Moon's phase.
   • Measure the water height each hour on one day, then compare it with the Moon that night.
5. 5.

   Noah wants to test whether high tides come about 50 minutes later each day. Which plan is best?

   • Write down the height of each high tide at one pier for a week, but not the times.
   • Write down the time of one high tide at the same pier each day for a week.
   • Write down the time of a high tide at a different pier each day for a week.
   • Write down the times of both high tides at one pier on a single day this week.
6. 6.

   Pia wants to test whether a storm changes the time of high tide at the boat ramp. Which plan is best?

   • Count the waves at the ramp on calm days and on stormy days, writing down each count.
   • Compare the tide table's time with the real time at the ramp on a single stormy day.
   • Compare the tide table's times with real times at a different harbor each stormy day.
   • Compare table times with real times at the ramp on calm days and on stormy days.
7. 7.

   Ren's club wants to test whether tides are bigger near new and full moons. Which plan is best?

   • Count the boats in the harbor near each new and full moon for two months.
   • Measure the range at a different harbor each time, near new and full moons, not the quarters.
   • Measure the range on the day of one full moon and treat that as the answer.
   • Measure the range at one harbor for two months, near new, full and quarter moons.

8. Read this first

   Table (example data)

   Mon, high at 6:10 a.m., 1.8 m, low 0.6 m. Tue, high at 7:00 a.m., 1.9 m, low 0.5 m. Wed, high at 7:50 a.m., 2.0 m, low 0.4 m.

9. 8.

   Tala studies a three-day tide table. Which claim does the table support?

   • On coasts around the world, tides come 50 minutes later each day.
   • High tide came about 50 minutes later each day, and the range grew a little.
   • The range stayed the same, because the high tide changed by 0.1 m a day.
   • Ten days after Monday, the high tide will come at 3:00 p.m. in the afternoon.

10. Table (example data)

    Mon, high at 8:00 a.m., 1.6 m, low 0.6 m. Tue, high at 8:50 a.m., 1.8 m, low 0.5 m. Wed, high at 9:40 a.m., 2.1 m, low 0.5 m.

11. 9.

    Ari studies a three-day tide table at a dock. Which claim does the table support?

    • The range will be 3.0 m next Wednesday, because it grew on each of the three days.
    • On docks around the world, the range grows for three days before shrinking.
    • The range stayed the same, because the low tide was 0.5 m on two of the days.
    • High tide came about 50 minutes later each day, and the range grew daily.

12. Table (example data)

    Sun, high at 9:30 a.m., 2.5 m, low 0.5 m. Mon, high at 10:20 a.m., 2.6 m, low 0.4 m. Tue, high at 11:10 a.m., 2.7 m, low 0.3 m.

13. 10.

    Bo studies a three-day tide table at a harbor. Which claim does the table support?

    • High tide came about 50 minutes later each day, and the range grew daily.
    • Harbors around the world have a high tide 50 minutes later each day, from now on.
    • The range stayed the same, because the high tide was about 2.6 m on each day.
    • The high tide will come at noon on Thursday, and the range will be 3.0 m.