Rocks, soil and fossils
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Questions
- 1Multiple choice · 20 s · 10 ptsNot played yet
Which layer of the Earth lies between the crust and the outer core?
- AInner core
- BMantle
- CAtmosphere
- DOcean floor
- 2Multiple choice · 20 s · 10 ptsNot played yet
The Earth's core is made mainly of which two metals?
- AGold and silver
- BCopper and tin
- CAluminium and zinc
- DIron and nickel
- 3True or false · 20 s · 10 ptsNot played yet
The crust is the thickest layer of the Earth.
- ✓True · བདེན།
- ✕False · རྫུན།
- 4Multiple choice · 20 s · 10 ptsNot played yet
How are igneous rocks formed?
- AMolten rock cools and hardens
- BLayers of sand are pressed together
- CRocks are changed by heat and pressure
- DShells pile up on the seabed
- 5Multiple choice · 20 s · 10 ptsNot played yet
Granite, shown in the picture, has large crystals you can see. Why are its crystals so large?

- AIt cooled quickly in the air
- BIt formed from shells and skeletons
- CIts magma cooled slowly underground
- DIt was squeezed by heavy rock layers
- 6True or false · 20 s · 10 ptsNot played yet
Basalt forms when lava cools quickly at the surface, so its crystals are very small.
- ✓True · བདེན།
- ✕False · རྫུན།
- 7Multiple choice · 20 s · 10 ptsNot played yet
How are sedimentary rocks formed?
- AMolten rock cools quickly
- BLayers of sediment are pressed and cemented
- CRocks melt deep underground
- DLava flows into the sea
- 8Multiple choice · 20 s · 10 ptsNot played yet
The layers of rock in the cliff in the picture formed from sediment. Which layers are usually the oldest?

- AThe layers at the bottom
- BThe layers at the top
- CThe layers in the middle
- DThey are all the same age
- 9Multiple choice · 20 s · 10 ptsNot played yet
Chalk and limestone are sedimentary rocks made mostly from what?
- ACooled lava
- BPieces of granite
- CFrozen mud
- DShells and skeletons of sea creatures
- 10Multiple choice · 20 s · 10 ptsNot played yet
Metamorphic rocks form when existing rocks are changed by what?
- AWind and rain
- BCooling lava
- CGreat heat and pressure
- DPlant roots
- 11Multiple choice · 20 s · 10 ptsNot played yet
The white rock in the picture is marble, a metamorphic rock. Which rock does marble form from?

- ALimestone
- BGranite
- CBasalt
- DSandstone
- 12Multiple choice · 20 s · 10 ptsNot played yet
Roof tiles like these are made from slate, a metamorphic rock that splits into thin, flat sheets. Which rock does slate form from?

- AGranite
- BShale (mudstone)
- CLimestone
- DBasalt
- 13True or false · 20 s · 10 ptsNot played yet
The Earth's inner core is liquid metal.
- ✓True · བདེན།
- ✕False · རྫུན།
- 14Multiple choice · 20 s · 10 ptsNot played yet
Fossils like the ammonite in the picture are found mostly in which type of rock?

- ASedimentary
- BIgneous
- CMetamorphic
- DLava rock
- 15True or false · 20 s · 10 ptsNot played yet
Most fossils form when a dead plant or animal is quickly buried by sediment.
- ✓True · བདེན།
- ✕False · རྫུན།
- 16Multiple choice · 20 s · 10 ptsNot played yet
What is the difference between weathering and erosion?
- AWeathering moves rock; erosion breaks it
- BThey are two names for the same thing
- CWeathering breaks rock; erosion moves it away
- DWeathering only happens in volcanoes
- 17Multiple choice · 20 s · 10 ptsNot played yet
Water seeps into a crack in a rock, freezes and expands, making the crack wider. What is this process called?
- ADeposition
- BBiological weathering
- CMelting
- DFreeze-thaw weathering
- 18Multiple choice · 20 s · 10 ptsNot played yet
The tree roots in the picture are slowly splitting the rock apart. What type of weathering is this?

- AChemical weathering
- BBiological weathering
- CFreeze-thaw weathering
- DErosion by wind
- 19Multiple choice · 20 s · 10 ptsNot played yet
Soil is a mixture of small rock particles, air, water and what else?
- AMelted lava
- BSalt from the sea
- CHumus from dead plants and animals
- DPieces of metal
- 20Multiple choice · 20 s · 10 ptsNot played yet
Diamond is the hardest natural mineral. Which element is it made of?
- ASilicon
- BIron
- CCalcium
- DCarbon
