How rocks change from one kind to another

Grade 6 Science Worksheet - Building Confidence

Circle the best answer.

1. 1.

   Bo reads about lava that poured from a volcano, then cooled and hardened into dark rock. Which type of rock formed?

   • Sedimentary
   • Metamorphic, since the lava was hot
   • Sediment
   • Igneous
2. 2.

   Deep underground, heat and pressure slowly changed limestone into marble without melting it. Which type of rock is marble, in Kira's notes?

   • Metamorphic
   • Magma
   • Sedimentary, since it began as limestone
   • Igneous, since it got hot
3. 3.

   On Jun's rock-cycle diagram, the arrow from sediment to sedimentary rock has no label. Which process goes on it?

   • Cooling and hardening
   • Heat and pressure
   • Melting
   • Pressing and cementing
4. 4.

   On the diagram, arrows from all three rock types point to magma. Which process belongs on those arrows, says Luz?

   • Melting
   • Weathering
   • Just igneous rock melts; the rest cannot
   • Pressing and cementing
5. 5.

   An arrow on Milo's diagram runs from igneous rock to sediment. Which processes belong on that arrow?

   • Heat and pressure
   • Melting and cooling
   • Weathering and erosion
   • No arrow; igneous rock must turn metamorphic next
6. 6.

   The kitchen counter at Noah's place is granite, with large crystals you can see. Which type of rock is granite?

   • Sedimentary
   • Sediment
   • Igneous
   • Metamorphic
7. 7.

   Cross-section, not to scale: bits of shell settling on a sea floor and forming layers. Ren learns that much limestone forms from bits of shell piling up on the sea floor and hardening. Which type of rock is it?

   • Lava rock
   • Sedimentary rock
   • Igneous rock
   • Metamorphic rock
8. 8.

   Wind and rain slowly wear a mountain down into sand. Which energy source powers the wind and rain, in Tala's science book?

   • Earth's inner heat
   • The Moon's pull
   • The Sun
   • Heat from lava
9. 9.

   Rock melts into magma deep underground. Which energy source does that, according to Zee's notes?

   • Earth's inner heat
   • Sunlight soaking into the ground
   • Wind blowing on the rock
   • Rain seeping down to the magma
10. 10.

    “Cross-section, not to scale:” Granite buried deep under a mountain range is heated and squeezed into gneiss. What supplies the heat, as Esme explains?

    • Sunlight warming the mountain
    • The Moon's pull on the mountain
    • Rain rubbing on the rock
    • Earth's inner heat