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?
- Igneous rock, since it started as granite
- Magma, since it went underground
- Metamorphic rock, since it was buried
- Sedimentary rock
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?
- Metamorphic, then igneous
- Igneous, then metamorphic
- Igneous, then magma
- 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?
- Sedimentary rock
- Igneous rock with large crystals
- Igneous rock with tiny crystals
- New marble
Luz's friend says metamorphic rock forms when rock melts and cools again. Which response is best?
- Agree: heat from the Sun melts it
- Disagree: it changes while solid, under heat and pressure
- Agree: melting is how rocks change type
- Disagree: it forms when sediment is cemented
Noah's cousin says the Sun's heat is what melts rock into magma. Which response is best?
- Disagree: rocks stay solid forever
- Disagree: Earth's inner heat melts rock; the Sun drives weathering
- Agree: the Sun powers the whole cycle
- Agree: sunlight soaks deep into rock
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
- Thousands to millions of years
- About a year, after one summer of sun
- A few days, once the sand is wet
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
- Limestone changing into marble
- Sand cementing into sandstone
- 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?
- Slate, a metamorphic rock
- Magma, as soon as it is buried
- Shale still, since rocks keep their type
- Sandstone, from being pressed again
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 cooled slowly, so it grew large crystals
- It melted, then cooled and hardened
- It formed fast, as rocks usually do