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?
- Sedimentary rock
- Metamorphic rock, since it was buried
- Igneous rock, since it started as granite
- Magma, since it went underground
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 metamorphic
- Metamorphic, then igneous
- Igneous, then sedimentary
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
- Sedimentary rock
- Igneous rock with large crystals
- New marble
Luz's friend says metamorphic rock forms when rock melts and cools again. Which response is best?
- Disagree: it changes while solid, under heat and pressure
- Agree: melting is how rocks change type
- Disagree: it forms when sediment is cemented
- Agree: heat from the Sun melts it
“Poster drawing:” A poster says rocks always go igneous, then sedimentary, then metamorphic, in that order. Which response does Milo give?
- Agree: and each step takes a few years
- Agree: the cycle runs one way
- Disagree: any rock type can become any other
- Disagree: sedimentary rock has to come first
Pia plans to watch sand turn into sandstone in a jar on the windowsill. About how long does that change take in nature?
- A few days, once the sand is wet
- Thousands to millions of years
- About a year, after one summer of sun
- It cannot happen; sand stays sand
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.
- Lava cooling into rock at the surface
- Sand cementing into sandstone
- Limestone changing into marble
- A mountain wearing down to sand
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?
- Shale still, since rocks keep their type
- Sandstone, from being pressed again
- Magma, as soon as it is buried
- Slate, a metamorphic rock
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?
- Igneous rock
- Sedimentary rock
- Metamorphic rock
- Lava
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 melted, then cooled and hardened
- It formed fast, as rocks usually do
- It cooled slowly, so it grew large crystals