Font size
S
M
L
XL
WorksheetsSCIENCE HALF TERM EXAMINATION -GRADE 9
Total questions: 125
Worksheet time: 1hrs 5mins
Name
Class
Date
1.
What is the main function of the mitochondria in a cell?
a)
Protein production
b)
Energy release
c)
Cell division
d)
Photosynthesis
2.
Which of these is found in plant cells but not in animal cells?
a)
Cytoplasm
b)
Nucleus
c)
Mitochondria
d)
Chloroplast
3.
The diagram shows a food web. If the population of insects decreases, which is most likely to happen?
a)
Mouse population will increase
b)
Plant population will decrease
c)
Owl population will increase
d)
Mouse population will decrease
4.
Which structure is common to both a bacterial and an animal cell?
a)
Cell wall
b)
Chloroplast
c)
Nucleus
d)
Cell membrane
5.
Why is a red blood cell shaped like a biconcave disc?
a)
To trap more sunlight
b)
To increase surface area for oxygen transport
c)
To store food
d)
To divide more quickly
6.
In a series circuit, what happens to the current when another lamp is added?
a)
It stays the same
b)
It increases
c)
It decreases
d)
It reverses
7.
The diagram shows a circuit with one cell and one lamp. What would happen if another cell is added in series?
a)
The lamp gets dimmer
b)
The lamp gets brighter
c)
The current stops
d)
The circuit breaks
8.
What layer of the Earth includes the crust and uppermost mantle?
a)
Inner core
b)
Asthenosphere
c)
Lithosphere
d)
Biosphere
9.
Which gas makes up most of clean, dry air?
a)
Oxygen
b)
Carbon dioxide
c)
Nitrogen
d)
Argon
10.
How does air pollution affect the composition of the atmosphere?
a)
Increases nitrogen levels
b)
Increases oxygen content
c)
Adds harmful gases like sulfur dioxide
d)
Removes water vapor
11.
Which gas in the atmosphere do humans need most to survive?
a)
Helium
b)
Oxygen
c)
Methane
d)
Nitrogen
12.
The pie chart shows the composition of air. Which section represents oxygen?
a)
I
b)
II
c)
III
d)
None
13.
Which process in the water cycle changes water from liquid to vapor?
a)
Precipitation
b)
Condensation
c)
Evaporation
d)
Filtration
14.
Water collecting in lakes and rivers after rainfall is called:
a)
Groundwater
b)
Run-off
c)
Condensation
d)
Transpiration
15.
What causes a lunar eclipse?
a)
The Moon passes between the Earth and the Sun
b)
The Earth casts a shadow on the Moon
c)
Clouds cover the Moon
d)
The Moon moves away from Earth
16.
Which of the following best describes how scientific knowledge is built?
a)
It is based on opinions
b)
It never changes
c)
It develops through testing and reviewing
d)
It is only created by famous scientists
17.
Why is it important for scientists to share their findings with others?
a)
To become famous
b)
To be challenged and improved by others
c)
To earn money
d)
To keep knowledge secret
18.
Why do scientists repeat experiments?
a)
To make them more difficult
b)
To increase the number of chemicals used
c)
To make the data more reliable
d)
To reduce the cost
19.
Which of the following is a renewable resource?
a)
Coal
b)
Crude oil
c)
Wind
d)
Natural gas
20.
What is the main difference between climate and weather?
a)
Weather changes slowly; climate is daily
b)
Climate is about long-term patterns; weather is short-term
c)
Weather refers to ocean currents
d)
Climate only refers to temperature
21.
What do we call the remains of ancient organisms used as fuel today?
a)
Minerals
b)
Fossil fuels
c)
Renewable resources
d)
Groundwater
22.
How does solar power help the planet?
a)
Increases rainfall
b)
Reduces greenhouse gas emissions
c)
Speeds up climate change
d)
Produces waste
23.
Why is scientific knowledge considered reliable?
a)
Because it's always written in textbooks
b)
Because it’s based on tradition
c)
Because it’s tested, reviewed, and updated over time
d)
Because it’s made by governments
24.
What is one way chemistry is used in farming?
a)
Harvesting crops
b)
Building tractors
c)
Producing fertilizers and pesticides
d)
Writing farm reports
25.
Which industry depends heavily on physics?
a)
Fashion
b)
Telecommunications
c)
Cooking
d)
Education
26.
In which career is understanding biology essential?
a)
Architect
b)
Lawyer
c)
Marine biologist
d)
Pilot
27.
Why should the public understand science-related issues?
a)
So they can argue online
b)
So they can vote scientifically
c)
To make informed choices in health, environment, and policy
d)
To become scientists
28.
Which behavior demonstrates ethical use of scientific knowledge?
a)
Using technology to harm others
b)
Publishing false results for fame
c)
Using data to improve public health
d)
Ignoring environmental impacts
29.
What is the main function of the kidneys?
a)
Pump blood
b)
Absorb oxygen
c)
Remove waste and regulate water
d)
Digest proteins
30.
What happens to blood sugar levels after eating?
a)
They drop quickly
b)
They stay constant
c)
They rise and are controlled by insulin
d)
They turn into proteins
31.
What is homeostasis?
a)
Movement of water
b)
Control of cell size
c)
Maintaining stable internal conditions
d)
Variation of DNA
32.
Sweating when it’s hot helps the body to:
a)
• Absorb more sunlight
b)
• Increase energy
c)
• Maintain temperature
d)
• Lose muscle mass
33.
Which of these is a structural adaptation?
a)
• A rabbit freezing when threatened
b)
• A cactus having spines instead of leaves
c)
• A polar bear choosing to hibernate
d)
• A bird singing
34.
What does the term "biodiversity" refer to?
a)
• The number of predators in a habitat
b)
• The number of species in an area
c)
• The variety of minerals in soil
d)
• How many humans live in a city
35.
Which pyramid always narrows at the top?
a)
• Pyramid of biomass
b)
• Pyramid of energy
c)
• Pyramid of population
d)
• Pyramid of height
36.
Why does a food chain usually not go beyond five levels?
a)
• There aren’t enough species
b)
• Too many decomposers interfere
c)
• Not enough energy is transferred
d)
• Carnivores don’t need food
37.
What could be a direct result of deforestation?
a)
• Increased biodiversity
b)
• Stable carbon dioxide levels
c)
• Loss of habitat and species
d)
• Formation of lakes
38.
What role do decomposers play in the nitrogen cycle?
a)
• Absorb water
b)
• Turn nitrogen into proteins
c)
• Break down waste to return nutrients
d)
• Produce nitrogen gas
39.
Which process removes carbon dioxide from the atmosphere?
a)
• Respiration
b)
• Combustion
c)
• Photosynthesis
d)
• Decomposition
40.
Which of the following actions would best protect biodiversity?
a)
• Cutting more trees
b)
• Building over wetlands
c)
• Establishing wildlife reserves
d)
• Hunting endangered species
41.
What is the mass number of an atom?
a)
• Number of protons
b)
• Number of electrons
c)
• Number of protons + neutrons
d)
• Number of electrons + neutrons
42.
Where are electrons found in an atom?
a)
• Inside the nucleus
b)
• In orbitals or shells around the nucleus
c)
• Mixed with neutrons
d)
• Attached to protons
43.
What do all atoms of the same element have in common?
a)
• Same number of neutrons
b)
• Same number of protons
c)
• Same number of electrons
d)
• Same mass
44.
Which of these elements is in Group 1 of the Periodic Table?
a)
• Calcium
b)
• Neon
c)
• Sodium
d)
• Iron
45.
What type of bonding involves the transfer of electrons?
a)
• Covalent
b)
• Ionic
c)
• Metallic
d)
• Hydrogen
46.
What is formed when non-metals bond covalently?
a)
• Metals
b)
• Ions
c)
• Molecules
d)
• Salts
47.
Which property is typical of ionic compounds?
a)
• Low melting point
b)
• Conducts electricity when molten
c)
• Does not dissolve in water
d)
• Soft and squishy
48.
Why are metals malleable?
a)
• They have rigid structures
b)
• Their atoms are locked in place
c)
• Their ions slide over each other in a sea of electrons
d)
• They have no electrons
49.
Which of the following is a sign of a chemical change?
a)
• Melting
b)
• Boiling
c)
• Colour change
d)
• Freezing
50.
In a reaction, mass is conserved because:
a)
• Atoms disappear
b)
• Atoms are destroyed
c)
• No atoms are lost, they’re rearranged
d)
• New atoms are formed
51.
The diagram shows a paper chromatography result with several colours separated. What does each spot represent?
a)
A different solvent
b)
A separate solute
c)
A piece of paper
d)
A pH level
52.
Which change would make a solution more concentrated?
a)
Add more solute
b)
Remove water
c)
Add both solute and solvent
d)
A or B
53.
Which metal is most reactive with dilute acid?
a)
Copper
b)
Gold
c)
Iron
d)
Potassium
54.
What is the formula for speed?
a)
Speed = force × time
b)
Speed = distance ÷ time
c)
Speed = time ÷ distance
d)
Speed = energy ÷ mass
55.
What happens to pressure if the area increases but force stays the same?
a)
Pressure increases
b)
Pressure stays the same
c)
Pressure decreases
d)
Pressure turns into force
56.
What explains how perfume spreads across a room?
a)
Osmosis
b)
Air pressure
c)
Gravity
d)
Diffusion
57.
What happens when light hits a mirror?
a)
Refraction
b)
Absorption
c)
Diffraction
d)
Reflection
58.
The diagram shows light hitting a mirror. What law is shown?
a)
Law of angles
b)
Law of reflection
c)
Law of attraction
d)
Law of mirrors
59.
Why does light bend when entering water?
a)
The temperature changes
b)
Light speeds up
c)
Light slows down due to density
d)
Light is absorbed
60.
Which of the following is a renewable resource?
a)
Coal
b)
Crude oil
c)
Wind
d)
Natural gas
61.
Which resource is non-renewable?
a)
Sunlight
b)
Fossil fuels
c)
Tidal energy
d)
Biomass
62.
What is the main difference between climate and weather?
a)
Weather changes slowly; climate is daily
b)
Climate is about long-term patterns; weather is short-term
c)
Weather refers to ocean currents
d)
Climate only refers to temperature
63.
What is a galaxy?
a)
A collection of moons
b)
A large group of stars, gas, and dust
c)
A type of star
d)
A space rock
64.
Which of these is NOT part of our solar system?
a)
Jupiter
b)
The Moon
c)
A comet
d)
Andromeda galaxy
65.
What is produced when acids react with metals?
a)
• Salt and water
b)
• Salt and hydrogen gas
c)
• Water and oxygen
d)
• Carbon dioxide
66.
Which metals react most easily with dilute acid?
a)
• Copper and gold
b)
• Iron and zinc
c)
• Magnesium and potassium
d)
• Silver and platinum
67.
What does a balanced equation show?
a)
• That the products are heavier
b)
• That atoms are equal on both sides
c)
• That gas is produced
d)
• That the colour changes
68.
What would increase the rate of a chemical reaction?
a)
• Decreasing temperature
b)
• Using smaller surface area
c)
• Increasing concentration of reactants
d)
• Diluting the solution
69.
Why is it important to repeat experiments in chemistry?
a)
• To waste chemicals
b)
• To make it look hard
c)
• To check results are reliable
d)
• To use the same apparatus
70.
Which characteristic of living organisms is responsible for removing waste products?
a)
Growth
b)
Respiration
c)
Excretion
d)
Nutrition
71.
Why are viruses sometimes not considered living organisms?
a)
They are made of cells
b)
They do not have DNA
c)
They cannot reproduce without a host
d)
They breathe through cell membranes
72.
Which statement about food chains is correct?
a)
All food chains begin with a herbivore
b)
Energy flows from carnivores to plants
c)
Decomposers return nutrients to the soil
d)
Consumers produce energy from the sun
73.
What happens if decomposers are removed from an ecosystem?
a)
Plants grow faster
b)
Waste materials accumulate
c)
Energy flows better
d)
More food chains are formed
74.
Which structure is common to both a bacterial and an animal cell?
a)
Cell wall
b)
Chloroplast
c)
Nucleus
d)
Cell membrane
75.
Which process directly provides energy to cells?
a)
Photosynthesis
b)
Diffusion
c)
Respiration
d)
Transpiration
76.
A student says all microorganisms are harmful. Which argument best refutes this?
a)
Microorganisms do not exist in soil
b)
Some microorganisms are used in food production and decomposition
c)
Microorganisms cannot survive in the human body
d)
All microorganisms are viruses
77.
What are all materials made of?
a)
Cells
b)
Atoms
c)
Ions
d)
Electrons
78.
Which of the following is an element?
a)
Air
b)
Water
c)
Oxygen
d)
Salt
79.
What is the difference between a compound and a mixture?
a)
Compounds are made of atoms; mixtures are not
b)
Compounds are chemically combined; mixtures are not
c)
Mixtures are always solids; compounds are liquids
d)
Compounds are less useful than mixtures
80.
What best describes the particles in a gas?
a)
Closely packed and vibrating
b)
Randomly arranged and far apart
c)
Tightly bonded in rows
d)
Fixed in shape but not in volume
81.
The diagram shows a syringe being compressed. What happens to the gas particles inside?
a)
They change shape
b)
They get larger
c)
They move closer together
d)
They disappear
82.
What does pH measure?
a)
Temperature
b)
Acidity or alkalinity
c)
Density
d)
Energy
83.
Which substance would turn litmus paper blue?
a)
Vinegar
b)
Soap solution
c)
Lemon juice
d)
Water
84.
Which test confirms the presence of carbon dioxide?
a)
Squeaky pop test
b)
Glowing splint relights
c)
Limewater turns cloudy
d)
Litmus paper turns blue
85.
Which property is more typical of metals than non-metals?
a)
Dull surface
b)
Brittle
c)
Conducts electricity
d)
Low melting point
86.
What is a sign that a chemical reaction has taken place?
a)
A change in mass
b)
Melting
c)
A change in state
d)
Production of a new substance
87.
What happens in a neutralisation reaction?
a)
Water is always formed
b)
A gas is given off
c)
An acid reacts with a base
d)
A metal dissolves
88.
Which explanation best describes why alloys are harder than pure metals?
a)
The atoms are heavier
b)
The particles move faster
c)
The arrangement of atoms is irregular
d)
The temperature is higher
89.
What happens to energy during any event or process?
a)
It increases
b)
It gets lost
c)
It transforms and dissipates
d)
It stays the same type
90.
Which energy change occurs when a toaster is working?
a)
Sound → Light
b)
Heat → Electrical
c)
Electrical → Thermal
d)
Kinetic → Gravitational
91.
What flows in an electric circuit?
a)
Protons
b)
Light
c)
Electrons
d)
Heat
92.
Which of these is a good conductor of electricity?
a)
Plastic
b)
Rubber
c)
Copper
d)
Glass
93.
In a series circuit, what happens to the current when another lamp is added?
a)
It stays the same
b)
It increases
c)
It decreases
d)
It reverses
94.
The diagram shows a circuit with one cell and one lamp. What would happen if another cell is added in series?
a)
The lamp gets dimmer
b)
The lamp gets brighter
c)
The current stops
d)
The circuit breaks
95.
What causes tectonic plates to move?
a)
Wind currents
b)
Magnetic forces
c)
Convection currents in the mantle
d)
Ocean tides
96.
Where are earthquakes most likely to occur?
a)
Near the poles
b)
In the middle of tectonic plates
c)
Near tectonic plate boundaries
d)
In desert regions
97.
How does air pollution affect the composition of the atmosphere?
a)
Increases nitrogen levels
b)
Increases oxygen content
c)
Adds harmful gases like sulfur dioxide
d)
Removes water vapor
98.
Which gas in the atmosphere do humans need most to survive?
a)
Helium
b)
Oxygen
c)
Methane
d)
Nitrogen
99.
What holds the planets in orbit around the Sun?
a)
Solar wind
b)
Light from the Sun
c)
Gravity
d)
Magnetic fields
100.
A segment of DNA on a chromosome that codes for a specific trait
a)
Gene
b)
Chromosome
c)
DNA
d)
Nucleus
101.
The process in which genetic material is passed from parents to offspring
a)
acquaintance
b)
acquisition
c)
inheritance
d)
heritage
102.
The process of producing offspring
a)
reproduction
b)
replication
c)
duplication
d)
regeneration
103.
The fusion of sperm and egg cell
a)
fertilization
b)
combination
c)
addition
d)
unification
104.
the female gamete, from the mother
a)
ovum
b)
ovula
c)
ovary
105.
The male gamete, from the father
a)
sperm cell
b)
egg cell
106.
specialized cells involved in sexual reproduction
a)
gametes
b)
somatic cell
c)
neurons
107.
What is the total number of chromosomes present in a human being?
a)
23
b)
46
c)
69
d)
72
108.
Chromosomes that determines the gender of an individual (X and Y in humans)
a)
sex chromosomes
b)
DNA
c)
RNA
d)
Genes
109.
A fertilized egg, the beginning of a new organism
a)
zygote
b)
egg
c)
ovum
d)
fetus
110.
Any difference between individuals of the same species
a)
variation
b)
differentiation
c)
acclimation
d)
evolution
111.
The sex chromosome for male human beings.
a)
XY
b)
XX
c)
YY
d)
YX
112.
What is the pH range of an acid?
a)
4-6
b)
1-7
c)
1-6
d)
8-14
113.
What would happen to blue litmus paper if it came into contact with an acid?
a)
It would turn red
b)
It would turn green
c)
It would stay blue
d)
It would turn pink
114.
Which of the following pH values would be the weakest acid?
a)
1
b)
3
c)
5
d)
6
115.
Which of the following pH values would be the strongest acid?
a)
1
b)
3
c)
4
d)
6
116.
Which of the following chemical formulas is NOT an acid?
a)
HBr
b)
HF
c)
HCl
d)
LiOH
117.
What would happen to red litmus paper when it encounters a base?
a)
It turns blue
b)
It stays red
c)
It turns purple
d)
It turns green
118.
A substance is found to have the following characteristics:
Very bitter taste
Feels slippery to the touch
Produces OH- ions when dissolved in water
In what category would the substance be classified?
a)
acid
b)
base
c)
enzyme
d)
fatty acid
119.
Which of the following statements about acids is true?
a)
They taste sweet.
b)
They taste sour.
c)
They have a pH between 8-14.
120.
Milk is a very weak acid. What might its pH value be?
a)
6
b)
7
c)
4
d)
12
121.
Which method is used to prepare silver chloride?
a)
Add excess solid reactant to acid
b)
Titration
c)
Precipitation
122.
Complete the following word equation:
Metalcarbonate + acid -->
a)
Salt + Hydrogen
b)
Salt + Water + Carbon Dioxide
c)
Salt + Water
123.
What does the word insoluble mean?
a)
Does dissolve
b)
Doesn't dissolve
c)
Is part of a solid
124.
What salt is produced if you react sodium hydroxide with hydrochloric acid?
a)
sodium hydroxide
b)
sodium sulfate
c)
sodium nitrate
d)
sodium chloride
125.
How do you separate an excess insoluble reactant from a solution?
a)
Filtration
b)
Precipitation
c)
Crystalisation
d)
Evaporation
Reset
