WorksheetsBIOLOGY and PHYSICS
Total questions: 100
Worksheet time: 50mins
Name
Class
Date
1.
Which of the following is a product of photosynthesis
a)
oxygen
b)
nitrogen
c)
carbon dioxide
d)
methane
2.
Which of the following is not part of a plant cell
a)
nucleus
b)
mitochondrion
c)
chloroplast
d)
ribosome
3.
What is the process by which plants make their own food called?
a)
respiration
b)
photosynthesis
c)
digestion
d)
transpiration
4.
Which of the following is responsible for carrying out photosynthesis in plant cells
a)
nucleus
b)
chloroplast
c)
mitochondrion
d)
vacuole
5.
The process by which plants release water vapour through their leaves is called
a)
transpiration
b)
respiration
c)
excretion
d)
osmosis
6.
What is the primary source of energy for photosynthesis?
a)
carbon dioxide
b)
water
c)
sunlight
d)
chlorophyll
7.
What is the byproduct of photosynthesis that is released into the atmosphere?
a)
carbon dioxide
b)
oxygen
c)
glucose
d)
water
8.
What is the role of chlorophyll in photosynthesis?
a)
to absorb water
b)
to absorb light energy
c)
to release carbon dioxide
d)
to release oxygen
9.
What is the overall equation for photosynthesis?
a)
6 CO2 + 6 H2O → C6H12O6 + 6 O2
b)
6 CO2 + 6 O2 → C6H12O6 + 6 H2O
c)
6 H2O + 6 O2 → C6H12O6 + 6 CO2
d)
6 CO2 + 6 H2O → 6 O2 + 6 H2O
10.
Why is photosynthesis essential for life on Earth?
a)
It produces carbon dioxide and oxygen
b)
It produces oxygen and organic compounds
c)
It releases water and water vapor
d)
It releases glucose and carbon dioxide
11.
What is photosynthesis?
a)
The process of making glucose from sunlight
b)
The process of releasing oxygen from plants
c)
The process of making energy from sunlight
d)
The process of growing plants from seeds
12.
Which of the following is responsible for respiration in plant cells
a)
nucleus
b)
chloroplast
c)
mitochondrion
d)
vacuole
13.
What are the raw materials for photosynthesis?
a)
Water, carbon dioxide, and sunlight
b)
Water, oxygen, and glucose
c)
Carbon dioxide, oxygen, and sunlight
d)
Water, glucose, and sunlight
14.
. What are the products of photosynthesis?
a)
Glucose and oxygen
b)
Water and carbon dioxide
c)
Oxygen and sunlight
d)
Glucose and water
15.
What is the reactant that provides energy for photosynthesis?
a)
chlorophyll
b)
carbon dioxide
c)
sunlight
d)
oxygen
16.
What is the by-product of photosynthesis that is released into the air?
a)
carbon dioxide
b)
oxygen
c)
water
d)
glucose
17.
Why is photosynthesis important for life on Earth?
a)
It produces oxygen and glucose
b)
It produces water and carbon dioxide
c)
It produces sunlight and energy
d)
It produces plants and animals
18.
What would happen if photosynthesis stopped occurring?
a)
Plants would grow faster
b)
Animals would have more oxygen
c)
The Earth's atmosphere would change
d)
The Earth's temperature would increase
19.
How can you test for starch in a leaf?
a)
By adding iodine solution
b)
By adding water
c)
By adding chlorophyll
d)
By adding carbon dioxide
20.
What color change occurs when starch is present in a leaf?
a)
Blue to white
b)
White to blue
c)
Colorless to blue-black
d)
Blue-black to colorless
21.
What is the role of magnesium in photosynthesis?
a)
To absorb water
b)
To absorb carbon dioxide
c)
To absorb sunlight
d)
To absorb magnesium
22.
What is the role of nitrate in plant growth?
a)
To provide energy
b)
To provide water
c)
To provide nitrogen
d)
To provide carbon dioxide
23.
What is the main difference between photosynthesis and respiration? N|B: Multiple answers
a)
Photosynthesis produces oxygen, while respiration consumes oxygen
b)
Photosynthesis consumes oxygen, while respiration produces oxygen
c)
Photosynthesis produces glucose, while respiration consumes glucose
d)
Photosynthesis consumes glucose, while respiration produces glucose
24.
What is the similarity between photosynthesis and respiration?
a)
Both produce energy
b)
Both consume energy
c)
Both produce oxygen
d)
Both consume oxygen
25.
What is the role of stomata in photosynthesis? NB: multiple answers
a)
A) To absorb water
b)
B) To absorb carbon dioxide
c)
C) To release oxygen
d)
D) To release water vapor
26.
Where are stomata usually found in a leaf?
a)
A) On the upper surface
b)
B) On the lower surface
c)
C) On the stem
d)
D) On the roots
27.
When does photosynthesis occur?
a)
A) At night
b)
B) During the day
c)
C) During the winter
d)
D) During the summer
28.
Where does photosynthesis occur?
a)
in the leaves
b)
in the roots
c)
in the flowers
d)
in the stems
29.
Which part of the leaf has more stomata?
a)
lower epidermis
b)
upper epidermis
c)
midrib
d)
petiole
30.
What is the function of the chloroplasts in a leaf?
a)
A) To absorb water
b)
B) To absorb carbon dioxide
c)
C) To produce glucose
d)
D) To produce oxygen
31.
Which stage of photosynthesis requires light energy?
a)
light dependent reactions
b)
light independent reactions
c)
calvin cycle
d)
stomatal diffussion
32.
Which molecule is a carrier of energy during photosynthesis?
a)
ATP (Adenosine triphosphate)
b)
DNA (Deoxyribonucleic acid)
c)
RNA (Ribonucleic acid)
d)
Protein (Polpypeptides / Amino acids)
33.
What role does water play in photosynthesis?
a)
source of carbon
b)
supplies electron
c)
releases oxygen
d)
provides energy
34.
In the photosynthesis equation,
6CO2 + 6O2 + Light energy → C6H12O6 + 6H2O,
what does “C6H12O6” represent?
a)
carbon dioxide
b)
oxygen
c)
glucose
d)
water
35.
How does an increase in light intensity affect the rate of photosynthesis?
a)
A) It has no effect
b)
B) It decreases the rate
c)
C) It increases the rate
d)
D) It stops photosynthesis
36.
Which environmental factor can negatively impact photosynthesis if it becomes too high?
a)
oxygen concentration
b)
carbon dioxide concentration
c)
light intensity
d)
temperature
37.
What is the relationship between photosynthesis and the oxygen content in the atmosphere?
a)
A) Photosynthesis decreases oxygen levels
b)
B) Photosynthesis has no impact on oxygen levels
c)
C) Photosynthesis increases oxygen levels
d)
D) Photosynthesis creates carbon dioxide
38.
Which gas is necessary for photosynthesis to occur?
a)
oxygen
b)
carbon dioxide
c)
nitrogen
d)
hydrogen
39.
What is the main function of xylem vessels in plants?
a)
a) Transporting sugars from leaves to other parts
b)
b) Transporting water and minerals from roots to other parts
c)
c) Regulating stomatal openings
d)
d) Synthesizing nutrients
40.
What does the term "transpiration" refer to in the context of xylem vessels?
a)
a) The release of oxygen during photosynthesis
b)
b) The process of water and mineral uptake by roots
c)
c) The movement of sugars through the phloem
d)
d) The loss of water vapor from leaves
41.
Which of the following is NOT a factor influencing transpiration?
a)
a) Wind speed
b)
b) Humidity
c)
c) Root pressure
d)
d) Temperature
42.
How do plants regulate transpiration to conserve water?
a)
a) By increasing the number of stomata
b)
b) By increasing light intensity
c)
c) By closing stomata
d)
d) By decreasing root length
43.
What is the primary function of stomata during transpiration?
a)
a) To release oxygen
b)
b) To regulate temperature
c)
c) To release carbon dioxide
d)
d) To control water loss
44.
What is the main reason for transpiration in plants?
a)
a) To release excess water from roots
b)
b) To cool down the plant
c)
c) To facilitate gas exchange
d)
d) To transport nutrients
45.
In which plant tissue does transpiration primarily occur?
a)
a) Xylem
b)
b) Phloem
c)
c) Epidermis
d)
d) Parenchyma
46.
What is a variegated leaf?
a)
A) a leaf with varying length
b)
B) a leaf with a large surface area
c)
C) a leaf with different colours
d)
D) a leaf with varying densities
47.
If a plant does not get the minerals it needs, the condition is called
a)
A) stunted growth
b)
B) mineral deficiency
c)
C) asymptomatic
d)
D) healthy growth
48.
In finding out the effect of different colours of light on the rate pf photosynthesis, the number of bubbles that the water plant gave off in one minute was counted.
What will be the variable that needs to be changed (Independent variable)?
a)
A) the different colours of light
b)
B) the type of plant used
c)
C) the time used (1 minute)
d)
D) the number of bubbles collected
49.
In finding out the effect of different colours of light on the rate pf photosynthesis, the number of bubbles that the water plant gave off in one minute was counted.
What will be the variable that needs to be unchanged / maintained (Control variable)?
a)
A) the different colours of light
b)
B) the type of plant used
c)
C) the time used (1 minute)
d)
D) the number of bubbles collected
50.
In finding out the effect of different colours of light on the rate pf photosynthesis, the number of bubbles that the water plant gave off in one minute was counted.
What will be the variable that needs to be observed / measured (Dependent variable)?
a)
A) the different colours of light
b)
B) the type of plant used
c)
C) the time used (1 minute)
d)
D) the number of bubbles collected
51.
What is the Carbon cycle?
a)
a) The process by which carbon moves through the atmosphere, oceans, living organisms, and the Earth
b)
b) The process of carbon forming rocks
c)
c) The process of converting carbon dioxide into nitrogen
d)
d) The process by which carbon stays in the soil permanently
52.
Which process removes carbon dioxide (CO₂) from the atmosphere?
a)
a) Respiration
b)
b) Photosynthesis
c)
c) Combustion
d)
d) Volcanic eruptions
53.
Which of the following is a carbon sink, a place where carbon is stored?
a)
a) Atmosphere
b)
b) Oceans
c)
c) Animals
d)
d) Clouds
54.
Which of the following human activities significantly disrupts the carbon cycle?
a)
a) Deforestation
b)
b) Planting trees
c)
c) Reducing pollution
d)
d) Conserving energy
55.
What is the primary role of plants in the carbon cycle?
a)
To produce carbon dioxide
b)
To absorb oxygen
c)
To convert sunlight into energy
d)
To decompose organic matter
56.
Combustion is another word for ......
a)
Respiration
b)
Burning
c)
F|ossil fueling
d)
Transportation
57.
How does carbon become locked inside the earth?
a)
Tree roots expel carbon into the soil as they grow
b)
Humans use machines to pump carbon dioxide into large underground tanks
c)
Rocks become richer in carbon as time goes on
d)
The carbon-rich bodies of plants and animals decay into the earth after they die
58.
What is the primary source of carbon dioxide released into the atmosphere?
a)
a) Volcanic activity
b)
b) Human respiration
c)
c) Photosynthesis
d)
d) Ocean currents
59.
How do plants initially take up carbon dioxide from the environment?
a)
a) Through their roots
b)
b) Through their stems
c)
c) Through their flowers
d)
d) Through small openings in their leaves
60.
What process releases carbon dioxide into the atmosphere as a result of the respiration of living organisms?
a)
a) Photosynthesis
b)
b) Combustion
c)
c) Decomposition
d)
d) Condensation
61.
What is the main way in which carbon dioxide is removed from the atmosphere?
a)
a) Through volcanic eruptions
b)
b) Through ocean evaporation
c)
c) Through photosynthesis
d)
d) Through human activities
62.
Which human activity is a major contributor to the increase in carbon dioxide levels in the atmosphere?
a)
a) Recycling
b)
b) Deforestation
c)
c) Water conservation
d)
d) Using public transportation
63.
What is the term for the process by which plants and algae convert carbon dioxide into glucose during photosynthesis?
a)
a) Carbon emission
b)
b) Carbon fixation
c)
c) Carbon decomposition
d)
d) Carbon respiration
64.
What happens to the carbon stored in plants and animals after they die?
a)
a) It is released into the atmosphere through photosynthesis
b)
b) It remains in the soil and does not affect the carbon cycle
c)
c) It is stored indefinitely in the form of fossils
d)
d) It is released back into the atmosphere through decomposition
65.
How do fossil fuels, such as coal and oil, contribute to the carbon cycle?
a)
a) They trap carbon in the atmosphere
b)
b) They release carbon dioxide through photosynthesis
c)
c) They release carbon dioxide through combustion
d)
d) They absorb excess carbon dioxide from the atmosphere
66.
What is the main role of the ocean in the carbon cycle?
a)
a) The ocean absorbs excess carbon dioxide from the atmosphere
b)
b) The ocean releases carbon dioxide into the atmosphere
c)
c) The ocean prevents carbon dioxide from entering the atmosphere
d)
d) The ocean stores carbon dioxide permanently
67.
How does deforestation impact the carbon cycle?
a)
a) It reduces carbon dioxide levels in the atmosphere
b)
b) It has no effect on the carbon cycle
c)
c) It releases stored carbon into the atmosphere
d)
d) It speeds up the process of carbon fixation
68.
How does the shape of an object affect its stability when floating?
a)
increases stability
b)
decreases stability
c)
no effect
d)
depends on the size
69.
Which fluid has a lower density, Oil or Water?
a)
Oil
b)
Water
c)
No difference
d)
None, it depends on temperature
70.
When an object with a density of 0.5g/cm is placed in water, what will happen?
a)
It will sink
b)
It will float
c)
It will suspend
d)
It will decrease in size
71.
The term used to describe the ability of an object to float is .......
a)
Buoyancy
b)
Floatation
c)
Suspension
d)
Sinking
72.
What is the formula for calculating density?
a)
a) Density = Mass ÷ Volume
b)
b) Density = Mass × Volume
c)
c) Density = Volume ÷ Mass
d)
d) Density = Mass + Volume
73.
What factor determines whether an object sinks or floats in a liquid?
a)
Mass
b)
Volume
c)
Shape
d)
Density
74.
If a cube of metal has a volume of 4 cm³ and a mass of 16 grams, what is its density?
a)
a) 4 g/cm³
b)
b) 12 g/cm³
c)
c) 8 g/cm³
d)
d) 2 g/cm³
75.
What happens to the density of a gas when it is compressed into a smaller volume?
a)
a) The density decreases
b)
b) The density increases
c)
c) The density stays the same
d)
d) The density becomes zero
76.
Which of these items will float on water?
a)
Rock
b)
Wood
c)
Metal
d)
Glass
77.
What happens to the density of a substance if its mass increases but its volume stays the same?
a)
a) The density decreases
b)
b) The density increases
c)
c) The density stays the same
d)
d) The density doubles
78.
Why does a metal ship float, even though the metal is denser than water?
a)
A) The ship’s shape allows it to displace more water
b)
B) The ship’s weight is less than water
c)
C) The ship's metal has no mass
d)
D) The water has no density near the ship
79.
If an object floats on water, which of the following is true about the forces acting on it?
a)
A) Weight is greater than upthrust
b)
B) Upthrust is equal to weight
c)
C) Weight is less than upthrust
d)
D) There are no forces acting on the object
80.
Which of these liquids has the highest density?
a)
A) Water
b)
B) Oil
c)
C) Mercury
d)
D) Alcohol
81.
What is the formula for calculating mass
a)
Mass/Volume
b)
Density x Volume
c)
Mass/Density
d)
Density/Mass
82.
Calculate the density of a substance with a mass of 200g and a volume of 250cm3?
a)
0.8g/cm3
b)
1.25g/cm3
c)
8.0g/cm3
d)
12.5g/cm3
83.
Which of the following is the unit of density in the SI system?
a)
A) g/cm³
b)
B) kg/m²
c)
C) kg/m³
d)
D) N/m³
84.
If two objects have the same mass but different volumes, which one will have a higher density?
a)
A) The object with the larger volume
b)
B) The object with the smaller volume
c)
C) Both will have the same density
d)
D) Density does not depend on volume
85.
What is the primary cause of climate change in recent decades?
a)
a) Deforestation
b)
b) Greenhouse gas emissions
c)
c) Solar activity
d)
d) Volcanic eruptions
86.
Which of the following is a greenhouse gas responsible for global warming?
a)
a) Nitrogen (N₂)
b)
b) Oxygen (O₂)
c)
c) Carbon dioxide (CO₂)
d)
d) Argon (Ar)
87.
What is the term for the process by which heat is trapped in the Earth's atmosphere by greenhouse gases?
a)
a) Global cooling
b)
b) Photosynthesis
c)
c) Greenhouse effect
d)
d) Ozone depletion
88.
Which of the following human activities contributes the most to climate change?
a)
a) Recycling waste
b)
b) Burning fossil fuels
c)
c) Planting trees
d)
d) Building wind farms
89.
What impact does climate change have on sea levels?
a)
a) Sea levels are rising due to melting ice caps and glaciers
b)
b) Sea levels are falling as ice melts
c)
c) Sea levels are unaffected by climate change
d)
d) Sea levels only rise during storms
90.
Which of the following renewable energy sources can help reduce climate change?
a)
a) Coal
b)
b) Wind power
c)
c) Natural gas
d)
d) Oil
91.
What is the effect of deforestation on climate change?
a)
a) It reduces carbon dioxide in the atmosphere
b)
b) It has no effect on the climate
c)
c) It increases carbon dioxide levels, contributing to climate change
d)
d) It helps restore balance in the climate
92.
What is the main difference between weather and climate?
a)
a) Weather refers to long-term patterns, and climate refers to short-term conditions.
b)
b) Weather refers to the short-term conditions, and climate refers to long-term patterns.
c)
c) Weather is about temperature, and climate is about precipitation.
d)
d) Climate only happens in polar regions.
93.
What instrument is used to measure air pressure?
a)
a) Thermometer
b)
b) Barometer
c)
c) Anemometer
d)
d) Rain gauge
94.
Which climate zone is characterized by hot temperatures year-round and significant rainfall?
a)
a) Polar
b)
b) Tropical
c)
c) Temperate
d)
d) Desert
95.
What is the main source of energy that drives weather patterns on Earth?
a)
A) Wind
b)
B) Ocean currents
c)
C) Sun
d)
D) Earth's core
96.
Which of the following is considered part of Earth's climate system?
a)
A) The atmosphere
b)
B) The oceans
c)
C) Land surfaces
d)
D) All of the above
97.
Which natural phenomenon causes periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, affecting global weather patterns?
a)
A) Monsoon
b)
B) La Niña
c)
C) El Niño
d)
D) Tornado
98.
What is the consequence of global warming on polar ice caps?
a)
A) Increased ice formation
b)
B) Melting ice leading to sea level rise
c)
C) Expansion of polar regions
d)
D) Decreased global temperatures
99.
Which of the following human activities contributes most to deforestation and climate change?
a)
A) Planting trees
b)
B) Urbanization
c)
C) Clearing forests for agriculture
d)
D) Building wind farms
100.
Which international agreement was created to reduce greenhouse gas emissions and combat climate change?
a)
A) Paris Agreement
b)
B) Kyoto Protocol
c)
C) Montreal Protocol
d)
D) Geneva Convention
100 %
