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Yr 9 Yearly Science Revision 2020 Flashcards | StudBud
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Yr 9 Yearly Science Revision 2020
Yr 9 Yearly Science Revision 2020
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Answers
1
Continental drift and seafloor spreading describe the theory of
subduction
geochronology
paleomagnetism
plate tectonics
2
Wegener used evidence from land features, fossils and climate to support his theory of continental drift.
True
False
3
What is Seafloor Spreading?
When new crust is created where two plates diverge.
When plates collide very quickly.
When ocean floor is flattened by weathering and erosion.
When the ocean floor sinks beneath other ocean floor.
4
Why is the magnetic striping of the seafloor considered evidence for seafloor spreading.
It shows that the seafloor has not moved.
It shows the seafloor is being created and plates are moving.
5
Define Diffusion
The distribution of resources across global boundaries
The movement of particles across a semi permeable membrane
6
The part of the brain that looks like sausages is
cerebellum
cerebrum
brainstem
7
Which type of boundary is the diagram showing?
Divergent
Transform fault
Convergent
8
Homeostasis is defined as:
The detection of stimuli in the environment
A decrease in body temperature
A change in body temperature
The process of maintaining a constant internal environment
9
Why are bacteria becoming resistant to antibiotics? Because of ......
Smart uses of antibiotics
Repeated use of aspirin
Pharmaceutical industries
Overuse and misuse of antibiotics
10
Commensalism....
is when both organisms are being harmed
is when one organism is unaffected and one benefited
is when both organisms are being benefited
11
Symbiosis - mutualism, commensalism and parasitism. Look at picture to determine.
parasitism
commensalism
mutualism
12
Non-metals are found in the top right of the Periodic Table.
True
False
13
How do you determine the number of neutrons in the atom of an element?
Subtract the number of electrons from the number of protons
Subtract atomic number from the mass number
14
True or False; Electron cloud model is outdated/old
True; It is not the model we use today
False, It is the accepted model today
15
UV light is electromagnetic radiation that we can see
False
True
16
Universal indicator is what colour in acidic solutions?
red
purple
green
17
Which is the only heat transfer that can travel through the vacuum of space
conduction
radiation
convection
18
Most earthquakes occur
at plate boundaries
at the bottom of the ocean
under volcanoes
on mid oceanic ridges
19
8. Antibiotics ONLY kill bacteria
True
False
20
Which is the correct word equations for an ACID + CARBONATE reaction
acid + carbonate → salt + water + carbon dioxide
acid + carbonate → salt + water
21
A pH of ___ indicates a ___ solution.
none of the choices
9, positive
0, bad
7, neutral
22
The height of a wave is also known as its
velocity
wavelength
amplitude
frequency
23
This diagram shows the Law of Reflection. What is the arrow pointing to?
Dotted Line
Medium
Middle
Normal
24
If measuring the way light bends when passed through different lenses the dependent variable is
the angle the light bens
different shaped lenses
how many times the experiment is repeated
the light
25
The secondary colours are
cyan, amber and red
cyan, amber and blue
cyan, amber and magenta
This is ridiculous, no colours attend our school???
26
Cells that carry messages from your fingers to the brain are
sensory neurones
axons
dendrites
motor neurones
27
What is infectious disease
A disease caused by a pathogen, that can spread easily
School
HIV
An inherited disease
28
The nervous system is made up of the central nervous system and
the perfectual nervous system
the portal nervous system
the peripheral nervous system
the punctual nervous system
29
This diagram shows the Law of Reflection. What is the arrow pointing to?
Angle of Reflection
Incidence Ray
Concave Mirror
Reflected Ray
30
Is a sound wave electromagnetic
true
false
31
Microplastics are formed from human plastic waste. They impact the environment because
They are swallowed by marine life
They form blocks of trash in the sea
They fly through the air
They create a shield in the ocean
32
Oceanic crust is _______________________ than continental crust.
younger
denser
older
thinner
33
"Jigsaw Fit" is evidence for
evolution
sea floor spreading
plate tectonics
Ohms law
34
Which is a reactant in the equation: copper carbonate--> copper oxide + carbon dioxide
---->
copper oxide
carbon dioxide
copper carbonate
35
Which wave has the shortest wavelength
radio
microwaves
gamma
ultraviolet
36
In red light, a red shirt will appear
green
white
black
red
