A. Multiple Choice
A. Multiple Choice
One. Which organelle is known as the powerhouse of the cell?
A. Nucleus
B. Ribosome
C. Mitochondrion
D. Vacuole
Answer: C. Mitochondrion
Two. Which process do plants use to make food?
A. Respiration
B. Digestion
C. Photosynthesis
D. Transpiration
Answer: C. Photosynthesis
Three. What type of energy is stored in food?
A. Thermal
B. Chemical
C. Mechanical
D. Electrical
Answer: B. Chemical
Four. Which blood cells help fight infection?
A. Red blood cells
B. Platelets
C. White blood cells
D. Plasma
Answer: C. White blood cells
Five. What is the basic unit of life?
A. Tissue
B. Organ
C. Cell
D. System
Answer: C. Cell
Six. Which gas is most abundant in the Earth's atmosphere?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
Answer: C. Nitrogen
Seven. What force keeps planets in orbit around the sun?
A. Magnetism
B. Friction
C. Gravity
D. Electricity
Answer: C. Gravity
Eight. Which part of the human brain controls balance?
A. Cerebrum
B. Cerebellum
C. Medulla
D. Spinal cord
Answer: B. Cerebellum
Nine. What form of energy does a moving object have?
A. Potential
B. Chemical
C. Kinetic
D. Nuclear
Answer: C. Kinetic
Ten. Which system is responsible for breathing?
A. Digestive system
B. Circulatory system
C. Respiratory system
D. Nervous system
Answer: C. Respiratory system
Eleven. What happens during evaporation?
A. Solid turns into liquid
B. Liquid turns into gas
C. Gas turns into liquid
D. Solid turns into gas
Answer: B. Liquid turns into gas
Twelve. Which vitamin is produced when skin is exposed to sunlight?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Answer: D. Vitamin D
Thirteen. What is the boiling point of water at sea level?
A. zero degrees Celsius
B. fifty degrees Celsius
C. one hundred degrees Celsius
D. one hundred fifty degrees Celsius
Answer: C. one hundred degrees Celsius
Fourteen. Which planet is known as the Red Planet?
A. Venus
B. Mars
C. Jupiter
D. Saturn
Answer: B. Mars
Fifteen. Which substance has a definite shape and volume?
A. Gas
B. Liquid
C. Solid
D. Plasma
Answer: C. Solid
Sixteen. What organ filters waste from the blood?
A. Heart
B. Liver
C. Kidneys
D. Lungs
Answer: C. Kidneys
Seventeen. What is the function of roots in plants?
A. Make food
B. Absorb water and minerals
C. Produce seeds
D. Release oxygen
Answer: B. Absorb water and minerals
Eighteen. Which wave does not need a medium to travel?
A. Sound wave
B. Water wave
C. Light wave
D. Seismic wave
Answer: C. Light wave
Nineteen. What type of change occurs when ice melts?
A. Chemical change
B. Physical change
C. Nuclear change
D. Biological change
Answer: B. Physical change
Twenty. Which organ is responsible for digestion of food?
A. Heart
B. Brain
C. Stomach
D. Lungs
Answer: C. Stomach
Twenty-one. What is the smallest particle of an element?
A. Molecule
B. Atom
C. Cell
D. Ion
Answer: B. Atom
Twenty-two. Which sense organ is used for hearing?
A. Eye
B. Nose
C. Ear
D. Tongue
Answer: C. Ear
Twenty-three. What causes day and night?
A. Revolution of Earth
B. Rotation of Earth
C. Tilt of Earth
D. Gravity of Moon
Answer: B. Rotation of Earth
Twenty-four. Which part of the plant conducts food?
A. Xylem
B. Phloem
C. Root hair
D. Stomata
Answer: B. Phloem
Twenty-five. What type of energy is heat?
A. Chemical
B. Mechanical
C. Thermal
D. Nuclear
Answer: C. Thermal
Twenty-six. What system controls body activities?
A. Skeletal system
B. Muscular system
C. Nervous system
D. Digestive system
Answer: C. Nervous system
Twenty-seven. Which object reflects light?
A. Mirror
C. Sound
D. Heat
Answer: A. Mirror
Twenty-eight. Which planet is the largest in the solar system?
A. Earth
B. Mars
C. Jupiter
D. Saturn
Answer: C. Jupiter
Twenty-nine. What is the main function of leaves?
A. Support
B. Photosynthesis
C. Absorption
D. Reproduction
Answer: B. Photosynthesis
Thirty. Which material is a conductor of electricity?
A. Plastic
B. Wood
C. Rubber
D. Copper
Answer: D. Copper
Thirty-one. What is the normal human body temperature?
A. thirty-five degrees Celsius
B. thirty-six degrees Celsius
C. 37°C
D. thirty-eight degrees Celsius
Answer: C. thirty-seven degrees Celsius
Thirty-two. What organ pumps blood throughout the body?
A. Brain
B. Heart
C. Lungs
D. Kidney
Answer: B. Heart
Thirty-three. Which gas is released by plants during photosynthesis?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Answer: A. Oxygen
Thirty-four. What is the study of living things called?
A. Chemistry
B. Physics
C. Biology
D. Geology
Answer: C. Biology
Thirty-five. Which force opposes motion?
A. Gravity
B. Magnetism
C. Friction
D. Electricity
Answer: C. Friction
Thirty-six. What part of the eye controls the amount of light entering?
A. Retina
B. Pupil
C. Optic nerve
D. Lens
Answer: B. Pupil
Thirty-seven. Which type of energy is stored energy?
A. Kinetic
B. Thermal
C. Potential
D. Electrical
Answer: C. Potential
Thirty-eight. What gas do humans exhale?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Answer: C. Carbon dioxide
Thirty-nine. Which organ helps detoxify chemicals in the body?
A. Heart
B. Liver
C. Lung
D. Brain
Answer: B. Liver
Forty. Which layer of the Earth is the hottest?
A. Crust
B. Mantle
C. Outer core
D. Inner core
Answer: D. Inner core
B. True or False
B. True or False
Forty-one. Cells are the basic unit of life.
Answer: True
Forty-two. Sound travels faster than light.
Answer: False
Forty-three. Plants need sunlight to perform photosynthesis.
Answer: True
Forty-four. Gravity pulls objects toward the Earth.
Answer: True
Forty-five. Humans have four lungs.
Answer: False
Forty-six. Energy cannot be created or destroyed. Answer: True
Answer: True
Forty-eight. The heart is part of the circulatory system.
Answer: True
Forty-nine. Metals are good conductors of heat.
Answer: True
Fifty. The Moon produces its own light.
Answer: False
Fifty-one. Oxygen is needed for respiration.
Answer: True
Fifty-two. The brain controls voluntary actions. Answer: True
Fifty-three. Friction helps objects move faster.
Answer: False
Fifty-four. The Earth has one natural satellite. Answer: True
Fifty-five. Heat flows from cold to hot objects.
Answer: False
Fifty-six. Plants absorb water through their leaves.
Answer: False
Fifty-seven. Blood carries oxygen to body cells.
Answer: True
Fifty-eight. Electricity is a form of energy.
Answer: True
Fifty-nine. Humans are vertebrates.
Answer: True
Sixty. The sun is a star.
Answer: True