How rocks change from one kind to another
Grade 6 Science Worksheet - Challenge Me
Circle the best answer.
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?
- Magma, since it went underground
- Sedimentary rock
- Metamorphic rock, since it was buried
- Igneous rock, since it started as granite
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 magma
- Igneous, then sedimentary
- Igneous, then metamorphic
- Metamorphic, then igneous
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?
- Sedimentary rock
- Igneous rock with tiny crystals
- New marble
- Igneous rock with large crystals
Luz's friend says metamorphic rock forms when rock melts and cools again. Which response is best?
- Disagree: it forms when sediment is cemented
- Agree: heat from the Sun melts it
- Disagree: it changes while solid, under heat and pressure
- Agree: melting is how rocks change type
“Poster drawing:” A poster says rocks always go igneous, then sedimentary, then metamorphic, in that order. Which response does Milo give?
- Disagree: sedimentary rock has to come first
- Disagree: any rock type can become any other
- Agree: and each step takes a few years
- Agree: the cycle runs one way
Pia plans to watch sand turn into sandstone in a jar on the windowsill. About how long does that change take in nature?
- About a year, after one summer of sun
- It cannot happen; sand stays sand
- A few days, once the sand is wet
- Thousands to millions of years
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.
- Limestone changing into marble
- A mountain wearing down to sand
- Sand cementing into sandstone
- Lava cooling into rock at the surface
A layer of shale is buried kilometers deep. Over millions of years, heat and pressure act on it, but it never melts. What does Tala predict it becomes?
- Sandstone, from being pressed again
- Shale still, since rocks keep their type
- Slate, a metamorphic rock
- Magma, as soon as it is buried
Read this first
Use this
Model card:
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
- Lava
- Metamorphic rock
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 9.
- Its pieces were pressed and cemented
- It formed fast, as rocks usually do
- It melted, then cooled and hardened
- It cooled slowly, so it grew large crystals