Which of the following is the best definition for friction?

a force which opposes motion of one body over another

Elements in the same vertical group in the Periodic Table have:

similar properties, same number of electrons in outer shell

Which of the following statements are false?

neutrons are negatively charged, protons are postive

Group of organisms, can mate and produce fertile offspring

What does the term selective advantage mean?

An organism is well suited to its environment

Which of the following statement is the most correct? Atoms:

are the buiding blocks of elements

The grip on the handle of a tennis racquet has a rough surface to:

increase the friction between the handle and your hand

Identify the correct statement.

Ca becomes stable when it lose 2 electrons to form a cation

What causes variation to be passed on to offspring?

Only genes that are well adapted will be passed on

An atom of 17Cl35 has

17 protons, 18 neutrons, 17 electrons

The noble gases are found:

in the right most columns of the Periodic Table

The mass number of an element is

number of protons and neutrons in nucleus

Atomic number of copper is 29 and mass number is 64. The particles in a copper II ion (Cu2+)

29 protons, 27 electrons, 35 neutrons

Which of the following changes will increase the rate of a chemical reaction?

increasing the temperature of the reactants

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Year 10 Exam Revision Sem 1 2018

46 termsStudBud Administration122 plays

Chemistry, Physics, Bio

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Questions 46

Answers

1
Which of the following is not an example of a selection pressure?
All of the above
Reproduction
Food availability
Predation
2
Which of the following is the best definition for friction?
a force which opposes motion of one body over another
a force which opposes gravity
The force acting on a bpdy which depends of the weight
a force that stops a body from sliding down a slope
3
Name a process that can cause a change in a species over time.
All of the above
Reproduction
Disease
Mutation
4
Elements in the same vertical group in the Periodic Table have:
different properties same number of electrons in outer shell
similar properties, same number of electrons in outer shell
different properties and electrons in outer shell
similar properties different electrons in outer sell
5
During speciation, when do two groups become recognised, as separate species?
When they look different
When they cannot interbreed
When they are separated by an isolation barrier
When they live in different countries
6
Which of the following statements are false?
atoms consist of dense +ve nucleus and -ve electron cloud
electron have a -ve charge equal to the +ve charge of proton
electrons move very rapidly around the nucleus
neutrons are negatively charged, protons are postive
7
What is a species?
Group of organisms, can mate and produce fertile offspring
A group of organisms that have no similarities
Group of organisms, can mate, cant produce fertile offspring
A turtle found on the Galapagos
8
Which of the following is breaking the Law of Conservation of Energy?
Energy can be useful
Energy can be changed from chemical to heat energy
Energy can change form
Energy can be destroyed
9
What does the term selective advantage mean?
An organism is not well suited to its environment
An organism is well suited to its environment
An organism chnages to suit its environment
None of the above
10
Which of the following best defines potential energy?
The ability to do work
stored energy
energy due to the position of the object
energy due to the motion of the object
11
As you move across the Periodic Table the elements become:
solid in state
liquid
more conductive
less metallic
12
Identify the set that contains two metals and a non-metal
tungsten, niobium, bromine
fluorine, nitrogen, cobalt
tin, sodium, iodine, chloride
platinum, boron, neon
13
The number of electrons in a neutrallty charged atom is always equal to
number of protons
atomic number minus the number of electrons
number of protons added to the number of electrons
atomic number minus the number of protons
14
Type of isolation barrier: pollen grains from one specis do not produce with another species
Ecological
Mutation
Reproductive
Geographical
15
Which of the following traits would heko an organism survive in a cold climate?
Thick fur
All of the above
Small size
Short neck
16
What is the maximum number of electrons that can exist in the 2nd electron shell?
18
32
50
8
17
Which term best describes the ability of a metal to be bent or rolled into various shapes?
lustrous
brittle
ductile
malleable
18
Which of the following statement is the most correct? Atoms:
contain a nucleus of protons and electrons
are the smallest particles known
cannot be broken down into smaller particles
are the buiding blocks of elements
19
The grip on the handle of a tennis racquet has a rough surface to:
prevent sweat from running off the handle
allow you to apply more force to the handle
increase the friction between the handle and your hand
decrease the air resistance to the racquet
20
According to Darwin's Theory of natural selection, every species exhibits what?
None of the above
The same traits
variations
Colours
21
Identify the correct statement.
Ca becomes stable when it lose 2 electrons to form a cation
The number of neutrons is always equals to the protons
An anion has an excess of protons over electons
When atoms lose electrons they become negatively charged
22
The standard international unit for velocity is:
ms-1
kmhr-1
mhr-1
kms-1
23
To which group and period does bromine belong?
Group VII and Period 4
Group II and Period 6
Group VI and Period VII
Group VII and Period 3
24
Sodium has 11 electrons. When in its ground state, its electron configuration is:
2,9
11
10,1
2,8,1
25
Energy is ability of someone or something to do:
exercise
any type of movement
work
pushing or pulling
26
What does a Joule tell you?
How much energy is stored in an object
How much energy is needed to perfrom work
All of the above
How much energy is used to perform work
27
Organism A can interbreed with B, B can interbreed with C, but A and C cannot. How many species
2
3
4
1
28
Which is the first event that takes place during speciation?
Isolation
Mutation
Extinction
Selection pressure
29
What causes variation to be passed on to offspring?
Well adapted individuals have most chance of reproducing
Only genes that are well adapted will be passed on
Less well adapted individuals cannot reproduce
None of the above
30
An atom of ₁₇Cl³⁵ has
17 protons, 35 neutrons, 17 electrons
18 protons, 17 neutrons, 17 electrons
17 protons, 35 neutrons, 35 electrons
17 protons, 18 neutrons, 17 electrons
31
The carbpnate ion (CO₃^2-)has a valency of -2 because it:
has lost 2 protons
has 2 more neutrons than protons
has 2 more oxygen atoms than carbon atoms
has gained 2 electrons
32
An object moves at 5m/s, comes to rest in 10s. What is the initial velocity?
50m/s
5m/s
15m/s
zero
33
Type of isolation barrier means: islands in the Pacific colonised by birds on mainland
Ecological
Geographical
Reproductive
Mutation
34
In energy change some energy is always wasted as:
Heat
Thermal
Potential
Sound
35
The same energy conversion occurs in a person running, a car engine and a coal power station.
Heat → Kinetic
Kinetic → Electrical
Heat → Chemical
Chemical → Kinetic
36
Isotopes of an element have different:
numbers of electrons
mass numbers
number of protons
atomic numbers
37
Which of the following could be classified as an acid-metal reaction?
2C2H6 + 7O2 → 4CO2 + 6H2O
MgCl + 2AgNO3 → 2AgCl + Mg(NO3)2
2HCl + Mg → H2 + MgCl2
2Pb + O2 → 2PbO
38
What causes variation?
Changes in the environment
Mutation
Isolation
All of the above
39
The noble gases are found:
in the left most column of the Periodic Table
in the right most columns of the Periodic Table
scattered throughout the Periodic Table
in the centre columns of the Periodic Table
40
The mass number of an element is
number of protons, neutrons and electons in nucleus
number of neutrons and electons in nucleus
number of protons and electrons in nucleus
number of protons and neutrons in nucleus
41
What happens when energy interacts with matter?
The matter can be used to perform a function
The matter can change
All of the above
The matter can store energy
42
Which of the following elements contain more neutrons than protons?
oxygen
fluorine
carbon
nitrogen
43
Part 3 of Darwin's Theory: organisms with the most beneficial traits will prosper. Name of this
Survival of the strongest
Survival of the fittest
Survivial of the fattest
Outwit. Outplay. Outlast
44
Atomic number of copper is 29 and mass number is 64. The particles in a copper II ion (Cu²⁺)
27 protons, 29 electrons, 35 neutrons
29 protons, 27 electrons, 35 neutrons
35 protons, 29 electrons, 29 neutrons
29 protons, 29 electrons, 35 neutrons
45
Which of the following traits might be inherited from parents but not beneficial to surviving?
eye colour
large size
heightened senses
long legs
46
Which of the following changes will increase the rate of a chemical reaction?
reducing the surface area of the reactants
increasing the temperature of the reactants
increasing the temperature of the products
reducing the concentration of the reactants

Year 10 Exam Revision Sem 1 2018 Flashcards | StudBud