What evidence did Wegener use to support his theory of continental drift in 1912?

Geological records of rock strata on different continents

Which statement best describes an early attempted theory to explain how mountains formed?

the high points of the wrinkles formed the mountains

Convection currents are caused by?

The decay of radioactive rocks in the mantle

How did the early seas and oceans form?

Water vapour condensed in the air, and fell as rain

How did the levels of oxygen increase in Earth's early atmosphere?

Single celled organisms photosynthesised releasing oxygen

studbud

C1.7 Our Changing Planet

16 termsStudBud Administration133 plays

C1.7 Our changing Planet Year 10 OLD AQA spec

Flashcards16 cardsFPractice quizPHost liveL

Questions 16

Answers

1
Which row is correct about carbon sinks and carbon sources?
Row A
Row D
Row C
Row B
2
What evidence did Wegener use to support his theory of continental drift in 1912?
Plate tectonics moved the continents
Movement of continents by convection currents
Geological records of rock strata on different continents
Land bridge between two super continents
3
Which statement best describes an early attempted theory to explain how mountains formed?
mountains rose up from the sea bed
mountains were formed by rising tectonic plates
the high points of the wrinkles formed the mountains
mountains were formed by earthquakes
4
The middle layer of this diagram of the Earth is the?
atmopshere
magma
core
mantle
5
Which gas is used in crisp packets to keep the crisps fresher for longer?
oxygen
nitrogen
argon
carbon dioxide
6
The Miller-Urey experiment shows how...
lightning strikes occurred
amino acids could form
the early atmosphere was formed
the Earth's early oceans formed
7
Convection currents are caused by?
The movement of tectonic plates
The gravitational pull of the Sun on the Earth
The movement of the liquid outer core
The decay of radioactive rocks in the mantle
8
Which gas wasn't present in the Earth's early atmosphere?
nitrogen
carbon dioxide
oxygen
methane
9
Which row is correct for the percentage composition of gases in today's atmosphere?
Row C
Row A
Row D
Row B
10
Which of the following processes is a carbon source?
Ocean absorption
Combustion of fossil fuels
Photosynthesis
Formation of limestone
11
Nitrogen levels in the Earth's early atmosphere rose rapidly because?
Bacteria began decomposing nitrogen compounds
Volcanic activity increased
Animals excreted urea, which contains nitrogen
Oxygen levels rose
12
Which statement is NOT TRUE for why Wegener's idea of continental drift was refuted?
Many scientists believed the current theory
He couldn't explain how the continents moved
He was a German scientist
Scientists interpreted his evidence differently
13
Which gas is removed from the air before the air is cooled to -200^∘C?
argon
oxygen
carbon dioxide
nitrogen
14
How did the early seas and oceans form?
Water vapour condensed in the air, and fell as rain
As organisms respired water was released
Water deep in the oceanic crust percolated to the surface
Lightning strikes reacted hydrogen and oxygen together
15
Where do scientists believe life probably started on the Earth?
In the atmosphere
On the land
In the oceans
Deep within the crust
16
How did the levels of oxygen increase in Earth's early atmosphere?
Fissures in rock released oxygen
Erupting volcanoes released oxygen into the atmosphere
Plants photosynthesised releasing oxygen into the atmopshere
Single celled organisms photosynthesised releasing oxygen

C1.7 Our Changing Planet Flashcards | StudBud