Book 6 science quiz: free printable worksheet

Fill in the missing number

Number bank: 1   2   3.5   4   8   10   30   95   100   150   1,000   2012

1. The ocean is about _______ percent salt.
   From: Why Is the Ocean Salty?
2. Sand is any grain between about a sixteenth of a millimeter and _______ millimeters across.
   From: Why Is Beach Sand Often Tiny?
3. Crabs have _______ legs, including the two claws.
   From: Why Do Crabs Walk Sideways?
4. A jelly's body is about _______% water.
   From: Why Do Jellyfish Sting?
5. A glide can last around _______ seconds, or even longer.
   From: Why Do Flying Fish Jump?
6. The scientist Charles Darwin studied barnacles for _______ years!
   From: Why Do Barnacles Stick So Hard?
7. Sound travels about _______ times faster in water than in air.
   From: Why Do Some Whales Sing?
8. A blue whale can be nearly _______ feet long.
   From: Why Is a Blue Whale So Huge?
9. In _______, scientists finally filmed one alive in the deep sea!
   From: Why Is a Giant Squid So Hard to See?
10. Reefs cover less than _______ percent of the ocean floor.
    From: Why Do Reefs Look Like Cities?
11. One cleaner wrasse can serve over _______ customers a day, by some counts.
    From: Why Do Cleaner Fish Pick at Bigger Fish?
12. _______ whys is just a start, because the real ocean still has millions.
    From: Why Is the Ocean Worth a Whole Expedition?