Electricity moving through a light bulb filament heats up and glow because the filament

resists the flow of electricity.

What determines the features of an organism?

Genes and environmental factors

Which of the following identifies acidic substances?

cows milk, beer and black coffee

Which of the statements below is correct?

A zygote contains 46 chromosomes

What is an advantage of DNA mutating?

Mutations give rise to variation

Which of the following statements is true?

DNA is a double helix but RNA is a single helix

Which of the following is an example of a biotechnology?

Using bacteria to produce medicines

Which of the following lists contains ONLY forms of electromagnetic radiation?

Gamma rays, ultraviolet, x-rays

What is an exothermic reaction?

A reaction that emits heat energy to the surroundings

Why has the model of the atom changed?

New evidence does not fit the old model

Which sequence best describes the life cycle of a star?

protostar, main sequence star, red giant, supernova

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2016 VALID 10 Revision

106 termsStudBud Administration340 plays

Questions relating to revision of #stage5 #Science concepts for #VALID testing

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Questions 106

Answers

1
The image of the pencil is distored in the water because light has been
diffracted
reflected
refracted
scattered
2
The image represents the
Element Chart
Periodic Chart
Periodic Table
3
What is the total number of atoms represented in the formula H₂SO₄?
7
1
3
6
4
Identify the chemical reaction shown in the image
Neutralisation
Acid and Metal Carbonate
Precipitation
Decomposition
5
Electricity moving through a light bulb filament heats up and glow because the filament
resists the flow of electricity.
ignites the inert gas.
speeds up the current.
increases the voltage.
6
Letter D represents the
Inner core
Crust
Outer core
Mantle
7
Protons have a ________ charge
Neutral
Negative
Positive
8
What determines the features of an organism?
Environmental factors only
Genes only
Genes and environmental factors
Genes early in life,environmental factors later in life
9
Neutrons have a ________ charge
Positive
Neutral
Negative
10
When light hits a black curtain, what happens to most of the light?
It is absorbed by the curtain
It is refracted by the curtain.
It is transmitted through the curtain.
It is reflected off the curtain.
11
The system responsible for producing gametes is the
nervous
reproductive
respiratory
excretory
12
Which of the following identifies acidic substances?
battery acid, black coffee and pure water
cows milk, beer and black coffee
battery acid, black coffee and baking soda
black coffee, pure water and baking soda
13
Which of the statements below is correct?
A zygote contains 46 chromosomes
Egg and sperm cells contain 46 chromosomes.
All human cells contain 23 chromosomes
Females have one more chromosome than males.
14
The two types of diseases are
Genetic and environmental
Transmissable and Not-catchable
Infectious and non-infectious
15
Energy is transferred from one point to another in the form of
streams
beams
waves
16
Biotic is the term used to describe
living things
non-living things
17
The area where tectonic plates move apart are called
subduction zones
spreading zones
mid-ocean ridges
18
In a parallel circuit, the brightness of the lights will be
dimmer
brighter
19
Viruses are a problem as they can only be treated with
Vaccinations
Antibiotics
Cold and flu tablets
20
We hear echos because sound waves
scatter
refract
disapate
reflect
21
What is an advantage of DNA mutating?
Mutations cause deformities.
DNA is altered
Mutations give rise to variation
DNA mutations are essential for transportation of materials.
22
Name the process shown in the image
DNA mutation
DNA replication
DNA decomposition
DNA splitting
23
Your hand quickly moving off a hot plate is an example of a
thought
action
pain
reflex action
24
The endocrine system is the system responsible for producing
oxygen
blood
hormones
25
Which two scientists are given credit for describing the structure of DNA?
Darwin and Wallace
Fleming and Florey
Newton and Mendel
Watson and Crick
26
All matter is made of
Atoms
Stuff
Cells
27
Which of the following statements is true?
DNA is a double helix but RNA is a single helix
DNA contains genetic information but RNA does not
DNA is a double helix and that 4 bases - A,T,G and U
RNA has 4 bases - A,T,G and C
28
Which of the following is an example of a biotechnology?
Using bacteria to produce medicines
Using a telescope to look for life on other planets
Using a microwave oven to cook food
Using a fossil to estimate the age of a rock
29
Which of the following should contribute LEAST to a greenhouse effect?
Natural gas plant
Nuclear power plant
Coal-fired power station
Oil refinery
30
The amount of force exerted by an object is known as
Mass
Weight
31
The job of hormones is to
Repair body tissues
Regulate body function
32
Abiotic is the term used to describe
living things
non-living things
33
Inside the nucleus of an atom ____ can be found
Neutrons and Protons
Protons and Electrons
Electrons and Neutrons
34
A combustion reaction is an example of an
endothermic reaction
exothermic reaction
35
Which of the following lists contains ONLY forms of electromagnetic radiation?
Infrared, sound, ultraviolet
Sound, x-rays, gamma rays
Gamma rays, ultraviolet, x-rays
Infrared, seismic, microwaves
36
In natural selection, one species competes against another and the unsuccessful one dies out.
True
False
37
The image depicts the theory of
Plate movement
Volcanoes
Plate tectonics
38
Examples of abiotic things include
Temperature, pH
Flora and fauna
39
The two types of circuits are
Parallel and joint
Separate and together
Parallel and Series
40
What is an exothermic reaction?
A reaction that emits heat energy to the surroundings
A reaction that absorbs heat energy from the surroundings
41
In a neutralisation reaction, what is the expected pH of the products?
More than 7
Equal to 7
Less than 7
42
Letter B represents the
Outer core
Inner core
Mantle
Crust
43
Letter C represents the
Outer core
Inner core
Mantle
Crust
44
Distances in the universe are measured in
Light metres
Gigameters
Light years
Gigawatts
45
Using light to transmit information through fibre-optic cables is an example of
electromagnetic absorption
renewable energy
nuclear technology
communications technology
46
Why has the model of the atom changed?
Famous scientists make up new models
New evidence does not fit the old model
Scientists often change their minds
The scientists that made up the old models had died
47
Earthquakes produce seismic waves. These are waves that carry
Energy
Matter
Sound
Water
48
Which sequence best describes the life cycle of a star?
protostar, main sequence star, black hole
main sequence star, red giant, supernova, protostar
red giant, main sequence star, prototar, supernova
protostar, main sequence star, red giant, supernova
49
The area where one plate slides underneath another plate is called a
spreading zones
mid-ocean ridges
subduction zones
50
Letter A represents the
Outer core
Mantle
Crust
Inner core
51
Identify the products made in the reaction between an acid and a base
salt and hydrogen gas
salt and oxygen gas
salt and water
salt and carbon dioxide gas
52
Which observation made by astronomers supports the Big Bang theory?
Galaxies have stopped moving
Galaxies are colliding with each other
Galaxies are moving away from each other
Galaxies are moving towards each other
53
Earthquakes occur due to tectonic plates
spreading apart
clashing together
Sliding past each other
54
Over time, penicillin has become less effective in killing bacteria because
more people are allergic to penicillin
resistance to penicillin has been inherited
manufactures have not been able to make quality penicillin
penicillin decomposes too fast
55
Identify the chemical reaction in the image shown
Combustion
Decomposition
Neutralisation
Precipitation
56
Electrons are held in
Shells
the nucleus
Circles
57
What is the name of the following image?
Karyotype
Gene Chart
Chromotype
Genotype
58
Skin, saliva and tears are examples of the
second line of defence
first line of defence
third line of defence
59
The accepted scientific theory that describes the origin of the Universe is called the
particles model of matter
theory of plate tectonics
theory of evolution
Big Bang theory
60
Atoms are composed of
Protons
Neutrons
All of the above
Electrons
61
Electrons have a __________ charge
Negative
Neutral
Positive
62
The equipment has been set up to make oxygen gas and hydrogen gas from water. The reaction is..
Corrosion
Combustion
Neutralisation
Decomposition
63
The type of blood cells responsible for fighting infection are
Plasma
White
Red
64
Matter can neither be created nor destroyed in a chemical reaction. This is the law of
conservation of properties
conservation of reactants
consevation of energy
conservation of mass
65
What is the only reliable indicator of a chemical change?
A change in temperature
A new product is formed
A change in state
Disappearance of one or more reactants
66
The process by which the nucleus of an atom loses energy is known as
Breakdown
Radioactivity
Half-life
67
The material through which waves travel is known as a
substance
insulator
medium
transmitter
68
Weight is measured in
Newtons
Kilograms
69
Which of the following provides evidence of the big bang theory
Red shift of stars, amounts of hydrogen and helium
cosmic background radiation, the number of old galaxies
cosmic background radiation,blue shift of stars
Blue shift of stars,amount of hydrogen and helium
70
What is the name of the section labelled P on the DNA molecule?
chromosome
base
nucleus
gene
71
The model of the atom has changed over time
False
True
72
Infra-red radiation is useful for
Searching for survivors trapped after an earthquake
Communication
Taking images of bones
73
The cooling of magma where plates have spread apart produces
mid-ocean ridges
subduction zones
spreading zones
74
‘Natural selection’ is used to explain which scientific theory?
Conservation of energy
Evolution
Taxonomy
Big Bang
75
Cell division producing 2 diploid daughter cells is called
recombinant DNA technology
binary fission
mitosis
meiosis
76
When skin cells divide, DNA is replicated exactly. What advantage does this give the new cells?
New cells will last longer than the ones they replace
New cells are more resistant to ultraviolet light.
New cells perform the same role as the cells they replaced
New cells are stronger than the ones they replace.
77
Which of the following identifies the reactants in the reaction?
acetic acid , sodium bicarbonate
water , carbon dioxide , sodiu bicarbonate
sodium acetate, water, carbon dioxide
acetic acid , water
78
During its lifetime, an animalgains adaptations that make itmore suited to its environment.
False
True
79
Infectious diseases involve the spread of
Blood
Air
Pathogens
80
Which of the following statements is false?
Sound waves with a high frequency will have a high pitch
Electromagnetic waves don't need a medium to travel through
Humans can only detect the visible light spectrum
All electromagnetic waves are transverse waves
81
The amount of matter in an object is known as
Weight
Mass
82
Which process causes changes in chromosomes?
Gene replication
DNA mutation
Cell division
Reproduction
83
Gamma waves have more energy that x-rays
False
True
84
Why are earth-based telescopes usually built at the top of high mountains?
prevents sound from interrupting electromagnetic detection
reduce atmospheric distortion of the images collected
astronomers are closer to the objects they are observing
prevents aircraft and birds from obstructing the view
85
The image shows the
Transmission spectrum
Electromagnetic spectrum
Radiation spectrum
86
The plates of the Earth move around due to
Magma
Lava
87
Which of these can result from a supernova?
red giant
nebula
black hole
planet
88
What type of cell can be formed by meiosis?
sperm cells
bone cells
brain cells
nerve cells
89
The atomic number of an element is the same as the number of
Neutrons
Protons
Electrons
90
Electricity is the movement of
Electrons
Protons
Neutrons
91
Which of the following is the currently accepted theory of the origin of the universe
Big Crunch Theory
Steady State Theory
Big Bang Thoery
Big Cool Theory
92
The third line of defence involves the production of
Blood Cells
Antibodies
Antibiotics
Cures
93
The pathway for messages travelling from your brain to your muscles is through
nerve fibres
blood vessels
air
94
A galaxy is
a group of stars
a fixed pattern of stars in the night sky
a ring of expanding gas
a glowing cloud of gas and dust
95
The 'pop' test is used to test for which gas?
Hydrogen
Oxygen
Nitrogen
Carbon dioxide
96
What is an endothermic reaction?
A reaction that emits heat energy to the surroundings
A reaction that absorbs heat energy from its surroundings
97
What is the purpose of the conclusion in a scientific investigation?
Explain the reason for doing the investigation
Gives sources of information to be used in the investigation
States an expected outcome of the investigation
Statement that says if results supports the hypothesis
98
Distances across the universe are best measured in
light years
metres
kilometres
astronomical units
99
Convection occurs in the
Crust
Asthenosphere
100
The process shown in the image is
Phagocytosis
Absorption
Digestion
101
All electromagnetic waves have the following characteristic in common
frequency
speed
wavelength
amplitude
102
The image shows the _______ system
Reproductive
Nervous
Respiratory
Endocrine
103
What is the control in a first-hand investigation?
Repetition of the investigation
Variable that is kept the same throughout the investigation
A variable that is changed throughout the investigation
A condition to which the investigation is compared
104
Cell division that produces 4 haploid daughter cells is called
meiosis
binary fission
recombinant DNA technology
mitosis
105
Which earthquake caused the most damage?
Ernabella
Southern Ocean
Korumburra
Newcastle
106
Where is DNA found in a cell?
endplasmic reticulum
nucleus
cytoplasm
ribosome

2016 VALID 10 Revision Flashcards | StudBud