What causes the tides

Grade 6 Science Worksheet - Challenge Me

Circle the best answer.

1. 1.

   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?

   • 8:20 a.m. and 8:45 p.m.
   • 7:30 a.m. and 7:55 p.m.
   • 5:00 a.m. and 5:25 p.m.
   • 6:40 a.m. and 7:05 p.m.
2. 2.

   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?

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

   High tides at Luz's pier on Tuesday are at 5:05 a.m. and 5:30 p.m. Tide times come about 50 minutes later each day. When are the two high tides on Friday?

   • 7:35 a.m. and 8:00 p.m.
   • 5:05 a.m. and 5:30 p.m.
   • 2:35 a.m. and 3:00 p.m.
   • 5:55 a.m. and 6:20 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 at a different beach each day for a month and note the Moon's phase.
   • Measure the water height each hour at the dock for a month and note the wind each day.
   • Measure the water height each hour on one day, then compare it with the Moon that night.
   • Measure the water height each hour at the dock for a month and note the Moon's phase.
5. 5.

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

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

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

   • 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.
   • 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.
7. 7.

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

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

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.
    • High tide came about 50 minutes later each day, and the range grew daily.
    • The range stayed the same, because the low tide was 0.5 m on two of the days.

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 high tide will come at noon on Thursday, and the range will be 3.0 m.
    • The range stayed the same, because the high tide was about 2.6 m on each day.