Earth’s Materials MCQ Test 2 Answers

1.
1 pt(s).
Which of these metals would be found pure in the earth’s crust
A. iron
correct answer choice answer choice you marked B. silver
C. aluminium
D. magnesium
2.
1 pt(s).
According to the graph, which air pollutant decreased the most from 1970 to 1991?

A. Carbon monoxide
B. Sulfur oxides
C. Particulates
correct answer choice answer choice you marked D. Lead
3.
1 pt(s).
What is the mass of the rock?

A. 335.6 g
B. 350.6 g
correct answer choice answer choice you marked C. 354.6 g
D. 356.0 g
4.
1 pt(s).
To obtain a very reactive metal from its compounds requires………….
A. little energy
correct answer choice answer choice you marked B. a lot of energy
C. not much heat
D. an act of God
5.
1 pt(s).
To obtain an unreactive metal from its compounds requires………….
correct answer choice answer choice you marked A. little energy
B. a lot of energy
C. much heat
D. hope
6.
1 pt(s).
Limestone is added to the Blast Furnace to remove impurities. The impurities float on the surface of the molten iron and forms a material called ….
A. scum
correct answer choice answer choice you marked B. slag
C. litter
D. concrete
7.
1 pt(s).
We can use the Blast Furnace to extract iron from iron ore but not aluminium from aluminium ore because ……
correct answer choice answer choice you marked A. iron is a less reactive metal and needs less energy to extract it from its ore
B. iron is a more reactive metal and needs less energy to extract it from its ore
C. iron is a less reactive metal and needs more energy to extract it from its ore
D. iron is a more reactive metal and needs more energy to extract it from its ore
8.
1 pt(s).
The blast furnace cannot be used to extract aluminium from its ore because
A. aluiminium is too unreactive a metal and needs the energy of electrolysis to extract it from its ore
correct answer choice answer choice you marked B. aluiminium is too reactive a metal and needs the energy of electrolysis to extract it from its ore
C. aluiminium is too reactive a metal and only needs gentle heating to extract it from its ore
D. aluiminium is an unreactive a metal and is found uncombined in the Earth’s crust
9.
1 pt(s).
Some metals are found uncombined, in their native form in the ground. These metals would be
A. hard
B. soft
correct answer choice answer choice you marked C. unreactive
D. reactive
10.
1 pt(s).
What rocks are you most likely to find beside a volcano?
correct answer choice answer choice you marked A. igneous
B. metamorphic
C. sedimentary
11.
1 pt(s).
When heat and pressure are applied to a rock, what kind of rock is formed?
A. sedimentary
B. igneous
correct answer choice answer choice you marked C. metamorphic
12.
1 pt(s).
What is the difference between an ore and a mineral containing a metal element?
A. an ore canotains only a small amount of the metal, but the mineral has enough to make it economic to extract the metal
B. a mineral contains only a small amount of the metal, but the ore has enough to make it uneconomic to extract the metal
correct answer choice answer choice you marked C. a mineral contains only a small amount of the metal, but the ore has enough to make it economic to extract the metal
D. an ore contains only a small amount of the metal, but the mineral has enough to make it uneconomic to extract the metal
13.
1 pt(s).
When copper chloride is electrolysed
A. copper metal forms at the positive electrode and chlorine gas forms at the negative electrode
B. chlorine gas forms at the positive electrode and chlorine gas forms at the negative electrode
C. copper metal forms at the positive electrode and copper metal forms at the negative electrode
correct answer choice answer choice you marked D. chlorine gas forms at the positive electrode and copper metal forms at the negative electrode
14.
1 pt(s).
When assessing what a soil is made up of, a sample can be shaken and left to settle. The bottom layer that settles out will contain
A. water
correct answer choice answer choice you marked B. sand
C. clay
D. silt
E. humus
15.
1 pt(s).
Four metals, silver, zinc, iron and copper were added to solutions of each of their salts. When iron was added to copper, what would be observed
A. the iron disappears
correct answer choice answer choice you marked B. the iron disappears and copper appears
C. the iron bubbles releasing hydrogen gas
D. no reaction would be seen

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