Question 1

Which gas is most abundant in the Earth's atmosphere?

Accepted Answer

Nitrogen

Answer

Hydrogen

Answer

Oxygen

Answer

Carbon dioxide

Question 2

What is the primary source of energy driving the water cycle?

Accepted Answer

Sun

Answer

Earth's core

Answer

Moon

Answer

Wind

Question 3

Which planet is known as the 'Red Planet'?

Accepted Answer

Mars

Answer

Jupiter

Answer

Saturn

Answer

Venus

Question 4

What is the basic unit of life?

Accepted Answer

Cell

Answer

Tissue

Answer

Organ

Answer

Molecule

Question 5

Which organelle is responsible for energy production in cells?

Accepted Answer

Mitochondrion

Answer

Chloroplast

Answer

Ribosome

Answer

Nucleus

Question 6

What is the boiling point of water at sea level in Celsius?

Accepted Answer

100°C

Answer

50°C

Answer

0°C

Answer

212°C

Question 7

What causes seasons on Earth?

Accepted Answer

Earth’s tilted axis

Answer

Earth’s distance from the sun

Answer

Moon’s gravity

Answer

Sun’s rotation

Question 8

Which blood cells help fight infection?

Accepted Answer

White blood cells

Answer

Platelets

Answer

Plasma

Answer

Red blood cells

Question 9

What is the main function of the large intestine?

Accepted Answer

Absorb water

Answer

Produce insulin

Answer

Digest proteins

Answer

Store bile

Question 10

Which organ filters blood and produces urine?

Accepted Answer

Kidneys

Answer

Bladder

Answer

Liver

Answer

Lungs

Question 11

What part of the cell contains genetic material?

Accepted Answer

Nucleus

Answer

Ribosome

Answer

Golgi apparatus

Answer

Cytoplasm

Question 12

Which planet has the most prominent ring system?

Accepted Answer

Saturn

Answer

Jupiter

Answer

Uranus

Answer

Neptune

Question 13

What causes tides on Earth?

Accepted Answer

Moon’s gravity

Answer

Sun’s heat

Answer

Earth’s rotation

Answer

Volcanic activity

Question 14

Which organ helps in detoxifying harmful substances in the body?

Accepted Answer

Liver

Answer

Heart

Answer

Pancreas

Answer

Kidney

Question 15

Which layer of the Earth is composed mostly of iron and nickel?

Accepted Answer

Inner core

Answer

Outer core

Answer

Crust

Answer

Mantle

Question 16

Which human body system is responsible for transporting oxygen and nutrients?

Accepted Answer

Circulatory

Answer

Digestive

Answer

Endocrine

Answer

Respiratory

Question 17

What is the main component of the sun?

Accepted Answer

Hydrogen

Answer

Nitrogen

Answer

Oxygen

Answer

Carbon dioxide

Question 18

Which vitamin is mainly produced when the skin is exposed to sunlight?

Accepted Answer

Vitamin D

Answer

Vitamin B

Answer

Vitamin C

Answer

Vitamin A

Question 19

Which phenomenon explains why we see lightning before we hear thunder?

Accepted Answer

Light travels faster than sound

Answer

Thunder occurs later

Answer

Thunder is silent

Answer

Lightning is closer

Question 20

What is the smallest unit of an element that retains its properties?

Accepted Answer

Atom

Answer

Electron

Answer

Compound

Answer

Molecule

Question 21

High-quality LET-style General Science Question #21

Accepted Answer

Option A

Answer

Option B

Answer

Option C

Answer

Option D

Question 22

What do we call animals that feed only on plants?

Accepted Answer

Herbivores

Answer

Insectivores

Answer

Omnivores

Answer

Carnivores

Question 23

What simple machine is a see-saw an example of?

Accepted Answer

Lever

Answer

Wheel and axle

Answer

Pulley

Answer

Inclined plane

Question 24

What is the most common state of matter in the universe?

Accepted Answer

Plasma

Answer

Solid

Answer

Liquid

Answer

Gas

Question 25

What is the main function of red blood cells?

Accepted Answer

Transport oxygen

Answer

Fight infection

Answer

Form clots

Answer

Regulate body temperature

Question 26

Which type of heat transfer happens through direct contact?

Accepted Answer

Conduction

Answer

Refraction

Answer

Radiation

Answer

Convection

Question 27

What do we call a change in position of an object over time?

Accepted Answer

Motion

Answer

Velocity

Answer

Mass

Answer

Force

Question 28

Which organ is responsible for pumping blood throughout the body?

Accepted Answer

Heart

Answer

Brain

Answer

Liver

Answer

Lungs

Question 29

Which process breaks down food into nutrients the body can use?

Accepted Answer

Digestion

Answer

Circulation

Answer

Excretion

Answer

Respiration

Question 30

What is the force that pulls objects toward the center of the Earth?

Accepted Answer

Gravity

Answer

Electricity

Answer

Friction

Answer

Magnetism

Question 31

Which of the following is NOT a renewable resource?

Accepted Answer

Fossil fuel

Answer

Solar energy

Answer

Hydropower

Answer

Wind energy

Question 32

What is the Earth's only natural satellite?

Accepted Answer

Moon

Answer

Asteroid

Answer

Sun

Answer

Mars

Question 33

What is the primary function of the respiratory system?

Accepted Answer

Exchange gases

Answer

Pump blood

Answer

Break down food

Answer

Filter toxins

Question 34

Which of the following is a conductor of electricity?

Accepted Answer

Copper

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 35

What is the largest planet in our solar system?

Accepted Answer

Jupiter

Answer

Earth

Answer

Uranus

Answer

Neptune

Question 36

What type of energy is stored in a stretched rubber band?

Accepted Answer

Potential

Answer

Kinetic

Answer

Thermal

Answer

Electrical

Question 37

What unit is used to measure electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Watt

Answer

Ohm

Question 38

Which organ regulates blood sugar levels?

Accepted Answer

Pancreas

Answer

Liver

Answer

Spleen

Answer

Kidney

Question 39

Which is an example of a physical change?

Accepted Answer

Melting ice

Answer

Cooking egg

Answer

Rusting of iron

Answer

Burning paper

Question 40

What is the chemical symbol of water?

Accepted Answer

H₂O

Answer

O₂

Answer

HCl

Answer

CO₂

Question 41

Which part of the brain controls balance and coordination?

Accepted Answer

Cerebellum

Answer

Brainstem

Answer

Cerebrum

Answer

Medulla oblongata

Question 42

What is the boiling point of water at standard atmospheric pressure?

Accepted Answer

100°C

Answer

110°C

Answer

120°C

Answer

90°C

Question 43

Which gas do plants absorb from the atmosphere for photosynthesis?

Accepted Answer

Carbon dioxide

Answer

Hydrogen

Answer

Oxygen

Answer

Nitrogen

Question 44

What type of eclipse occurs when the Moon blocks the Sun?

Accepted Answer

Solar eclipse

Answer

Total eclipse

Answer

Lunar eclipse

Answer

Partial eclipse

Question 45

What causes tides on Earth?

Accepted Answer

Moon’s gravity

Answer

Sun’s heat

Answer

Wind currents

Answer

Earth’s rotation

Question 46

Which organ filters blood in the human body?

Accepted Answer

Kidney

Answer

Liver

Answer

Heart

Answer

Pancreas

Question 47

Which planet is known for its prominent rings?

Accepted Answer

Saturn

Answer

Jupiter

Answer

Mars

Answer

Venus

Question 48

Which layer of the atmosphere contains the ozone layer?

Accepted Answer

Stratosphere

Answer

Troposphere

Answer

Mesosphere

Answer

Thermosphere

Question 49

Which element is essential for the formation of bones and teeth?

Accepted Answer

Calcium

Answer

Potassium

Answer

Iron

Answer

Iodine

Question 50

Which vitamin is synthesized when the skin is exposed to sunlight?

Accepted Answer

Vitamin D

Answer

Vitamin C

Answer

Vitamin A

Answer

Vitamin B

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