Digital information: bits, sampling and storage

Answer Key - Grade 11 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   How many different values can a binary number with 4 bits store, Ari?

   16 values
2. 2.

   How many different values can a binary number with 8 bits store, Bo?

   256 values
3. 3.

   How many different values can a binary number with 10 bits store, Esme?

   1024 values
5. 4.

   In the signal strip, how many bits does each sample use, Jun?

   • 2
   • 3
   • 8
6. 5.

   In the signal strip, what value does the bit pattern 111 stand for, Kira?

   Use the picture in question 4.

   • 111
   • 3
   • 7
7. 6.

   In the signal strip, the wave is sampled more often. What improves, Luz?

   Use the picture in question 4.

   • The sound wave gets louder
   • The copy follows the wave more closely
   • Each sample gets more bits on its own
8. 7.

   What values can a single bit have, Noah?

   • Any whole number
   • 0 or 1
   • 1 to 10
9. 8.

   Using SI prefixes, how many bytes are in 1 kB, Pia?

   • 8
   • 1000
   • 100
10. 9.

    Why can a digital song be copied many times without getting worse, Ren?

    • Copying adds extra bits
    • The copies are made louder each time
    • Each bit is read as 0 or 1
11. 10.

    A little noise is added to a digital signal. Why can it still be read, Tala?

    • Small noise doesn't flip 0s and 1s
    • Noise turns into extra music
    • Digital signals can't pick up noise