How rocks change from one kind to another

Grade 6 Science Worksheet - Challenge Me

Circle the best answer.

1. 1.

   A granite grain breaks off a mountain, rides a river to a lake floor, and is buried and cemented. Which rock does Esme say it ends up in?

   • Metamorphic rock, since it was buried
   • Igneous rock, since it started as granite
   • Sedimentary rock
   • Magma, since it went underground
2. 2.

   Lava cools into basalt. Much later, the basalt is buried deep and heated and squeezed. Which pair names the two rock types in order, as Jun traces them?

   • Igneous, then metamorphic
   • Metamorphic, then igneous
   • Igneous, then magma
   • Igneous, then sedimentary
3. 3.

   a marble layer melting deep down, and magma rising into a crack that stays below the surface. Marble is buried so deep that it melts. The magma rises into a crack and cools slowly, still underground. What forms, by Kira's trace?

   • Igneous rock with tiny crystals
   • Igneous rock with large crystals
   • New marble
   • Sedimentary rock
4. 4.

   “Poster drawing:” A poster says rocks always go igneous, then sedimentary, then metamorphic, in that order. Which response does Milo give?

   • Agree: the cycle runs one way
   • Disagree: sedimentary rock has to come first
   • Agree: and each step takes a few years
   • Disagree: any rock type can become any other
5. 5.

   Noah's cousin says the Sun's heat is what melts rock into magma. Which response is best?

   • Agree: sunlight soaks deep into rock
   • Disagree: rocks stay solid forever
   • Agree: the Sun powers the whole cycle
   • Disagree: Earth's inner heat melts rock; the Sun drives weathering
7. 6.

   Pia plans to watch sand turn into sandstone in a jar on the windowsill. About how long does that change take in nature?

   • It cannot happen; sand stays sand
   • About a year, after one summer of sun
   • Thousands to millions of years
   • A few days, once the sand is wet
8. 7.

   A few rock-cycle changes are fast. Ren looks for one that can happen in hours to days. Which change is it?

   Use the picture in question 6.

   • Sand cementing into sandstone
   • Limestone changing into marble
   • Lava cooling into rock at the surface
   • A mountain wearing down to sand

9. Read this first

   Use this

   Model card:

11. 8.

    In a class crayon model of the rock cycle, Zee presses loose crayon shavings into a layered block by hand. Which rock does the block stand for?

    • Sedimentary rock
    • Igneous rock
    • Metamorphic rock
    • Lava
12. 9.

    Next, the layered crayon block is warmed in warm water and squeezed hard, but it does not melt. Which rock does it model now, says Ari?

    Use the picture in question 8.

    • Igneous rock, since it was warmed
    • Sedimentary rock, since it still has layers
    • Magma, since heat was used
    • Metamorphic rock
13. 10.

    The teacher melts some crayon pieces and lets them cool into a smooth lump. Why does Bo say this models igneous rock?

    Use the picture in question 8.

    • Its pieces were pressed and cemented
    • It cooled slowly, so it grew large crystals
    • It formed fast, as rocks usually do
    • It melted, then cooled and hardened