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Yr 9 Earth Science Flashcards | StudBud
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Yr 9 Earth Science
Yr 9 Earth Science
25 terms
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To revise #earth science topics of #plate tectonics and #ecosystems.
Flashcards
25 cards
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Questions
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Answers
1
In a food web the recyclers of matter are
fungi and bacteria
decomposers
plants
2
The human impact of overcropping means
too many animals of one species being killed
crops need to be planted in limited areas
cutting down habitats limits animal space for breeding.
farmers need to stop planting year after year
3
Producers in the food chain are
decomposers
bacteria
animals that eat plants
plants
4
Abiotic factors include
water, temp, fire and soil type.
water, temp, wind, and gas
water, temp, fire, light, soil type and gas levels
5
The process of crust sinking down in called
plate tectonics
Subduction
seafloor spreading
magnetic striping
6
The place where the quake starts is called the
S point
epicentre
focus
7
What is seafloor spreading?
Ocean floor spreading
Oceanic crust spreading apart
continental crust spreading apart
Rocky crust being formed at ocean ridges and spreading out.
8
Structural adaptation is
a body part that helps an organism to survive.
a specific chemical reaction that helps an animal to survive
when an animal only comes out at night for safety.
9
What are the two types of crust?
Oceanic Crust and Continental crust
dirt crust and underwater crust
sea floor crust and land crust
10
Ecology is the study of
the environment
how animals relate to each other
animals
how organisms relate to each other and their environment.
11
Plates that slide past each other are called
Transform
converging
diverging
next Hollywood movie
12
an ecosystems need a supply of ____ and ______ to be sustainable.
food and water and light
matter and energy
food and water
13
A pyramid of biomass shows
the total mass of organism at each stage of a food chain.
the total mass of the food chain.
14
Support for the theory of continental drift includes:
the continents fit approximately
Some similarities of animals across once joined land.
There are similar animals on all continents.
The continents fit perfectly together
15
biotic factors include
competition, preyism, mutuality, parasitisms osmosis
competition, predation, mutualism, parasitism commensalism
16
plate boundaries that collide with each other are called
transforming
diverging
converging
dangerous
17
Natural impacts on ecosystems include
bush fires, chemical reactions, flooding
bush fires, flooding, and drought
18
Plate boundaries that move apart from each other are called
converging
dangerous
diverging
transforming
19
consumers are
organisms that need a ready-source of food.
only animals that eat meat
first level on the food web
not important in a food chain
20
What type of plate movement causes earthquakes to form?
convergent
Convergent and transform
diverging and transform
divergent and convergent
21
Who was the scientist responsible for the theory of continental drift?
Frank Taylor
Alfred Wegener
Harry Hess
Robert Dietz
22
only _____ of energy cycles through an ecosystem
1/10
50%
20%
1/100
23
What type of plate movement causes volcanoes to form?
transform and diverging
converging
converging and transform
Diverging
24
Which type of seismic wave causes the most damage?
Surface waves
Primary wave (P-waves)
Secondary waves (S- waves)
25
Oceanic plates colliding forms
one volcano at the epi centre
ocean trenches and volcanic islands
ocean trenches and earthquakes
