Four factors that can affect the rate of a chemical reaction

catalysts, temperature, surface area, concentration

which statement is NOT correct?

extinction of species is rare without human intervention

NOT essential for natural selection to occur?

desire to change to a new environment

a decomposition reaction

zinc carbonate is heated = zinc oxide and carbon dioxide

which does NOT describe a red giant?

very large, stable, middle-aged star like the sun

a combination reaction

zinc reacts with oxygen = zinc oxide (heat emitted)

supernova is the name given to:

end stage of a very massive star

a displacement reaction

copper + silver nitrate -> silver + copper nitrate

a neutralisation reaction

hydrochloricacid + sodiumhydroxide = water + sodium chloride

a precipitation reaction

Ba(NO3)(aq) + Na2SO4(aq) -> BaSO4 (s) + 2NaNO3(aq)

Charles darwin was the first to:

idea of natural selection to explain how organisms evolve

which of the following processes is an example of a chemical reaction?

iron rusts in a damp environment

which of the following statements about fossils are not correct?

all dead organisms are preserved as fossils

best description of the universe?

collection of galaxies, nebulae and stars

why is penicillin no longer as effective at controlling bacteria s it was 60 years ago?

bacteria resistant to penicillin have been 'selected' for

Has Not been observed as evidence for natural selection

giraffe necks get longer as they get older - stretch food

the heartzsprung-Russell diagram is a graph of:

absolute magnitude vs surface temperaure

true brightness of a star compared to how far way it is

identify which reaction would be an example of a decomposition reaction

magnesium and oxygen are converted into magnesium oxide

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Year ten science quiz

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chemical reactions, evolution and universe

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Questions 60

Answers

1
compared to other stars in universe, the mass of the sun is
same
small
average
huge
2
AgNO_3(aq)+NaCl -> AgCl_(s) + NaNO_3(aq)- products?
AgCL3 and NANO
AGCL and NANO3
AgCl and NaNo3
AGCL and Nano
3
Four factors that can affect the rate of a chemical reaction
catalysts, temperature, surface area, concentration
catalysts, protons, concentration, nitrate
surface area, protons, electrons and temperture
oxide, electrons, surface area, catalysts
4
which statement is NOT correct?
animals in zoos can save endangered animals from extinction
extinction=completely wiped out
extinction causes a loss of genetic info from gene pool
extinction of species is rare without human intervention
5
structures what result from common ancestry, we say they are
divergent structures
convergent structures
homologous structures
6
natural selection is based on which of the following principles
variation already exists within a species
organisms compete for resources, food, shelter and mates
organisms with features best suit enviro will prob survive
all of the above
7
NOT essential for natural selection to occur?
genetic variation among the members of a species
desire to change to a new environment
more offspring being produced by some members than others
time and isolation of a population
8
Which of the following is the correct formula for Copper(||) sulfate?
Cu2SO4
CuSO4
Cu(SO4)2
CuS
9
a decomposition reaction
hydrochloricacid + sodiumhydroxide = water + sodium chloride
copper + silver nitrate -> silver + copper nitrate
zinc carbonate is heated = zinc oxide and carbon dioxide
zinc reacts with oxygen = zinc oxide (heat emitted)
10
which does NOT describe a red giant?
star that swells to many times its original size
begins to form as helium builds up in the core of a star
new fusion-turning helium into heavier elements
very large, stable, middle-aged star like the sun
11
a combination reaction
hydrochloricacid + sodiumhydroxide = water + sodium chloride
zinc carbonate is heated = zinc oxide and carbon dioxide
zinc reacts with oxygen = zinc oxide (heat emitted)
Ba(NO3)(aq) + Na2SO4(aq) -> BaSO4 (s) + 2NaNO3(aq)
12
what evolution?
co-evolution
divergent
sexual selection
convergent
13
USA anteater and African aardvark have similarities yet do not have a recent common ancestor?
co-evolution
sexual selection
divergent evolution
convergent evolution
14
K SO₄²
K4(SO)2
K2SO4
K4SO2
KSO
15
what evolution?
co-evolution
sexual selection
convergent
divergent
16
similarities in the embryonic stage is called
natural embryology
comparative embryology
extinction embryology
fossil embryology
17
Enzymes are example of substances called
precipitates
acids
catalysts
bases
18
supernova is the name given to:
core of an exploded star
end stand of a very small star
beginnings of brand new star
end stage of a very massive star
19
a galaxy is
group of stars
group of planets
exploding star
cloud of dust and gas
20
a displacement reaction
hydrochloricacid + sodiumhydroxide = water + sodium chloride
copper + silver nitrate -> silver + copper nitrate
zinc carbonate is heated = zinc oxide and carbon dioxide
Ba(NO3)(aq) + Na2SO4(aq) -> BaSO4 (s) + 2NaNO3(aq)
21
Zn²⁺O²⁺
OZn
ZNO
ZnO
Zn2O2
22
our solar system is part of the:
orion constellations
andromeda galaxy
magellanic clouds
milky way galaxy
23
AgNO_3(aq)+NaCl -> AgCl_(s) + NaNO_3(aq)- what does (aq) mean?
soluble
non soluble
24
the atoms that came together to form the first stars were pulled together by
magnetic forces
friction
gravity
electric forces
25
a neutralisation reaction
zinc reacts with oxygen = zinc oxide (heat emitted)
hydrochloricacid + sodiumhydroxide = water + sodium chloride
copper + silver nitrate -> silver + copper nitrate
Ba(NO3)(aq) + Na2SO4(aq) -> BaSO4 (s) + 2NaNO3(aq)
26
apparent magnitude is:
super giant
how bright a star is
white dwarf
true brightness os a star compared to how far away it is
27
which is one of the following compounds would you expect to be insoluble in water?
NaCl
KNO3
CuSO4
CaCO3
28
a galaxy is
exploding star
cloud of dust and gas
group of stars
group of planets
29
name of the current theory about the origin of the universe?
expanding universe
big bang
oscillating universe
steady-state universe
30
a precipitation reaction
copper + silver nitrate -> silver + copper nitrate
Ba(NO3)(aq) + Na2SO4(aq) -> BaSO4 (s) + 2NaNO3(aq)
zinc reacts with oxygen = zinc oxide (heat emitted)
hydrochloricacid + sodiumhydroxide = water + sodium chloride
31
Charles darwin was the first to:
suggest animals have changed
say that characteristics acquired willbe passed to offspring
idea of natural selection to explain how organisms evolve
visit the Galapagos islands
32
which of the following processes is an example of a chemical reaction?
a mist forms when you breathe out onto cold glass
ice melts as you hold it in the palm of your hand
a litre of water boils dry in a saucepan
iron rusts in a damp environment
33
AgNO_3(aq)+NaCl -> AgCl_(s) + NaNO_3(aq)- reactants?
AgNO3 and NaCl3
AgNOand NaCl
AgNO3 and NaCl
AGNo3 and NACl
34
which of the following statements about fossils are not correct?
all dead organisms are preserved as fossils
the size, weight and speed of extinct animals are estimated
a dinosaur footprint is fossil
plants can be preserved as fossils
35
Sn²⁺NO^3-
SN(NO3)2
Sn(NO3)2
SnNO
Sn2No3
36
best description of the universe?
collection of galaxies, nebulae and stars
collection of solar systems separated by empty space
a collection of stars, separated by empty space
milky way galaxy, made of stars and planets
37
why is penicillin no longer as effective at controlling bacteria s it was 60 years ago?
the mould strain the penicillin comes from has become weaker
the penicillin mould has evolved to produce less penicillin
other antibiotics have been developed
bacteria resistant to penicillin have been 'selected' for
38
Has Not been observed as evidence for natural selection
giraffe necks get longer as they get older - stretch food
DNA of humans and chimpanzees are remarkable similar
human, monkey and chicken embryos have gills in early stage
no marsupials, echidnas, and platypuses in africa
39
the heartzsprung-Russell diagram is a graph of:
spectral colour vs temperaure
absolute magnitude vs surface temperaure
absolute magnitude vs apparent magnitude
absolute magnitude vs mass
40
the colour of a star is most directly related to its
surface temperature
volume
age
location
41
the first hominin species believed to have left Africa is:
Australopithecus africanus
homo neandertal
homo eretus
homo sapien
42
which one of the formulae listed contains the smallest number of hydrogen (H) atoms?
CA(CH3COO)2
AL(NH2)3
NH4NO3
(NH4)2SO3
43
AgCl is a precipitate? What does that mean?
insoluble
soluble
44
in the sun, hydrogen is transformed into
oxygen
water
helium
carbon dioxide
45
What describes the reaction of hydrogen with oxygen to produce water?
2H + O -> H2O
H2 + O2 -> H2O
H2 + O2 -> H2O
2H2 + O2 -> H2O
46
the 'big bang' theory is a possible explanation of:
the collapse of the universe
the birth of a star
the expansion of the universe
the formation of the solar system
47
absolute magnitude:
how bright a star is
super giants
true brightness of a star compared to how far way it is
white dwarfs
48
what evolution?
co-evolution
sexual selection
convergent
divergent
49
which part of mammals, amphibians, reptiles, and bird share a remarkably similar structure
skull
lungs
forearms
skin
50
energy is emitted from the sun as a result of:
chemical reactions
nuclear fusion
nuclear fission
burning of hydrogen
51
identify which reaction would be an example of a decomposition reaction
mercury oxide is converted to mercury and oxygen
magnesium and oxygen are converted into magnesium oxide
when iron and sulphur are heated together iron sulphide form
52
Na⁺Cl^-
NaCl
lNCa2+
Cl5Na2
ClNa
53
which is the following could result from sudden change in the environment?
convergent evolution
extinction
divergent evolution
speciation
54
the light year is a unit of:
brightness
distance
speed
time
55
the theory of natural selection is credited to:
Charles darwin
jean baptiste lamarck
Albert einstein
Alfred Wallace
56
2Na(s) + Cl₂(g) -> 2NaCl(aq)
decomposition
neutralisation
precipitation
combination
57
nursery of stars?
nebulae
white dwarfs
red giants
nova
58
comparative embryology shows
the genetic makeup of embryos
similarities among structures in embryos that go b4 adult
mutations in embryos
the similarity between limbs
59
an aqueous solution is obtained when:
a substance dissolves in any liquid
a substance is dissolved in water
water is removed from substance
when a substance is mixed with water and does not dissolve
60
a nebula is
a fixed patten of stars
an exploding star
a cloud of dust and gas
a group of stars

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