8G Quick Quiz


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8Ga 

1       The best way to describe a rock is:

A       one chemical.

B       a mixture of different minerals.

C       one compound.

D       a mixture of different elements.

 

2       In science, the texture of a rock is:

A       the way it feels.

B       whether it is hard or crumbly.

C       its colour.

D       the size and shape of the grains.

 

3       Which statement is true?

A       Granite is made from interlocking crystals.

B       Sandstone is made from interlocking crystals.

C       Granite is made from rounded grains with gaps between them.

D       Sandstone is made from rounded grains with no gaps between them.

 

4       Some rocks are porous because:

A       the rock dissolves in water.

B       water can get into gaps between the grains.

C       animals have dug burrows in the rock.

D       the rock is made of interlocking crystals.

 

8Gb

1       Rocks are weathered when:

A       it is windy.

B       they get very hot.

C       parts of the rock are worn away.

D       they are sheltered from the wind.

 

2       Rainwater is:

A       acidic, because it contains dissolved gases.

B       alkaline, because it contains dissolved gases.

C       acidic, because it contains dissolved salts.

D       alkaline, because it contains dissolved salts.

 

3       Which of these things does not happen when limestone is weathered?

A       Water runs over the rock without affecting it.

B       Cracks in the limestone get bigger.

C       Rainwater reacts with chemicals in the limestone.

D       Water runs through cracks in the limestone.

 


4       Which statement is true?

A       Granite is weathered more quickly than limestone.

B       Rainwater does not react with any of the minerals in granite.

C       Rainwater reacts slowly with the minerals in granite.

D       Rainwater dissolves the minerals in granite.

 

8Gc

1       Physical weathering happens to rocks when:

A       the weather is always hot.

B       the weather keeps changing between hot and cold.

C       the weather is always cold.

D       the rock gets struck by lightning.

 

2       Freeze–thaw action damages rocks because:

A       the rocks melt.

B       rocks try not to freeze.

C       water expands when it thaws.

D       water expands when it freezes.

 

3       Which kind of weather is most likely to cause freeze–thaw action?

A       Dry, warm weather.

B       Dry, cold weather.

C       Wet weather, when it is cold enough for water to stay frozen.

D       Wet weather, when it only gets cold enough to freeze at night.

 

4       Which of these statements is true?

A       Chemical weathering always involves water.

B       Physical weathering always involves water.

C       Chemical weathering depends on temperature changes.

D       Physical weathering happens because rainwater is slightly acidic.

 

8Gd

1       Sediment is:

A       rocks that have been dissolved by weathering.

B       very small fragments of rock which float on the surface of water.

C       pieces of rock which are too large to move.

D       bits of rock which get deposited by rivers and seas.

 

2       Which statement is true?

A       Slow moving water can carry quite large pieces of rock.

B       Slow moving water cannot carry any pieces of rock.

C       Fast moving water can carry quite large pieces of rock.

D       Fast moving water can only carry very tiny pieces of rock.

 

3       What happens to pieces of rock when they are transported?

A       Nothing.

B       They get bigger.

C       They get smaller.

D       They dissolve.

 


4       Sediment is deposited when:

A       flowing water speeds up.

B       flowing water slows down.

C       the weather gets warmer.

D       the weather gets cooler.

 

8Ge

1       Sediment sometimes forms in layers because:

A       rivers do not always transport the same kinds of sediment.

B       rivers always transport the same kinds of sediment.

C       layers look nice.

D       rivers only transport small grains of sediment.

 

2       Layers of sediment can be formed from salty water when:

A       rivers flow into the sea.

B       it rains.

C       the water evaporates and leaves the salt behind.

D       the water evaporates and carries the salt away with it.

 

3       All fossils are:

A       skeletons of animals.

B       different layers of sediment.

C       very old animals.

D       the remains of dead animals or plants trapped in sediments.

 

4       Which statement is not true?

A       Coal was formed from the remains of plants.

B       Coal was formed from the remains of dead sea animals.

C       Oil was formed from the remains of microscopic sea organisms.

D       Natural gas was formed from the remains of microscopic sea organisms.