7th Grade Life Science

49 Questions | Total Attempts: 1475

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7th Grade Science Quizzes & Trivia

Life science helps us study all living organisms in our world. Being that living organisms have a lot to be studies for example their habitats, adaptations and threats to life the course can be a little wide. The quiz below covers all the topics of life science for 7th grade. Give it a try.


Questions and Answers
  • 1. 
    Bacteria can be seen best at what power on our microscopes?
    • A. 

      100X

    • B. 

      400X

    • C. 

      50X

    • D. 

      They can't be seen with our microscopes.

  • 2. 
    The "brain" of a cell is the __________.
    • A. 

      Nucleus

    • B. 

      Cell membrane

    • C. 

      Cell wall

    • D. 

      Ribosome

  • 3. 
    Plant cells have 2 things that animal cells don't have. What are they?
    • A. 

      Nuclei and chromosmes

    • B. 

      Cell membrane and cytoplasm

    • C. 

      Cell wall and chloroplasts

    • D. 

      Plant and animal cells have the same structures

  • 4. 
    On a microscope, the diaphragm controls _____________.
    • A. 

      The size of the specimen

    • B. 

      The focusing

    • C. 

      How close the lens is to the slide

    • D. 

      The amount of light

  • 5. 
    The microscope part that holds the lenses and rotates is called the ________.
    • A. 

      Coarse adjustment knob

    • B. 

      Nosepiece

    • C. 

      Eyepiece

    • D. 

      Stage

  • 6. 
    Green plants take in _____ and produce ______.
    • A. 

      Co2, O2

    • B. 

      O2, Co2

    • C. 

      H2O, CO

    • D. 

      C6H12O6, H2O

  • 7. 
    3 bones that support the body are ______.
    • A. 

      The cranium, tarsals, and patella

    • B. 

      The scapula, sternum, and tibia

    • C. 

      The carpals, radius, and humerus

    • D. 

      The femur, vertebra, and ribs

  • 8. 
    The mandible can be found _______.
    • A. 

      In the chest

    • B. 

      In the lower leg

    • C. 

      In the jaw

    • D. 

      In the upper arm

  • 9. 
    The function of cartilage is to ______.
    • A. 

      Protect the ends of bones

    • B. 

      Make bones move more easily

    • C. 

      Both

    • D. 

      Neither

  • 10. 
    How are chicken wings different than human arms?
    • A. 

      Chickens have more phalanges.

    • B. 

      Human joints bend more easily.

    • C. 

      Chickens have more wrist bones.

    • D. 

      Chickens have fused phalanges.

  • 11. 
    The muscles that work as a pair to move the arm are the ______.
    • A. 

      Gastrocnemius and pectorals

    • B. 

      Bicep and tricep

    • C. 

      Masseter and trapezius

    • D. 

      Hamstring and quadriceps

  • 12. 
    Which of these is NOT an example of a smooth muscle?
    • A. 

      Deltoid

    • B. 

      Diaphragm

    • C. 

      Iris

    • D. 

      Intestine

  • 13. 
    Which organism causes athlete's foot?
    • A. 

      Virus

    • B. 

      Bacteria

    • C. 

      Fungus

  • 14. 
    On agar, bacteria look ________.
    • A. 

      Fuzzy or furry

    • B. 

      Flat and colorful

    • C. 

      Like tiny mushrooms

  • 15. 
    The layer of skin that bleeds when you cut it is the _______.
    • A. 

      Epidermis

    • B. 

      Dermis

    • C. 

      Fat layer

  • 16. 
    The most damaging sun rays are ____________.
    • A. 

      Visible light

    • B. 

      Infrared

    • C. 

      UV

  • 17. 
    Food stays in the stomach for about _________.
    • A. 

      12 hours

    • B. 

      15 minutes

    • C. 

      2 days

    • D. 

      6 hours

  • 18. 
    The most important stage of digestion (absorption of nutrients) takes place in the _____.
    • A. 

      Large intestine

    • B. 

      Small intestine

    • C. 

      Stomach

    • D. 

      Colon

  • 19. 
    Constipation results when ______________.
    • A. 

      Food moves too rapidly through the intestines

    • B. 

      Food moves too slowly through the intestines

    • C. 

      Bacteria are present

  • 20. 
    Normal human heart rate is about _______ beats per minute.
    • A. 

      120

    • B. 

      100

    • C. 

      60

    • D. 

      20

  • 21. 
    The large artery that carries blood to the brain and body is called the ______.
    • A. 

      Aorta

    • B. 

      Ventricle

    • C. 

      Capillary

    • D. 

      Vena cava

  • 22. 
    The most muscular part of the heart is the ____________.
    • A. 

      Septum

    • B. 

      Right side

    • C. 

      Left side

    • D. 

      Bottom

  • 23. 
    The small vessels that connect arteries and veins are called _________.
    • A. 

      Arterioles

    • B. 

      Valves

    • C. 

      Vessels

    • D. 

      Capillaries

  • 24. 
    Veins carry blood that is ___________.
    • A. 

      Low in oxygen

    • B. 

      High in oxygen

    • C. 

      Going to the brain

    • D. 

      Going to the organs

  • 25. 
    Which blood cells carry oxygen?
    • A. 

      Red blood cells

    • B. 

      White blood cells

    • C. 

      Platelets

    • D. 

      Fibrin cells

  • 26. 
    The windpipe is also known as the ___________.
    • A. 

      Esophagus

    • B. 

      Sphincter

    • C. 

      Trachea

    • D. 

      Epiglottis

  • 27. 
    Most of air is made up of ___________.
    • A. 

      Oxygen

    • B. 

      Carbon monxide

    • C. 

      Carbon dioxide

    • D. 

      Nitrogen

  • 28. 
    The addictive chemical in cigarettes is _____________.
    • A. 

      Tar

    • B. 

      Carbon dioxide

    • C. 

      Nicotine

    • D. 

      The addictive chemicals have been removed

  • 29. 
    Since we have been keeping track, air quality has normally been between _______.
    • A. 

      20-30

    • B. 

      30-40

    • C. 

      10-20

    • D. 

      Over 50

  • 30. 
    The brain part that controls the 5 senses is the _____.
    • A. 

      Cerebrum

    • B. 

      Cerebellum

    • C. 

      Medulla

    • D. 

      Spinal cord

  • 31. 
    If you have 20/40 vision, _____________
    • A. 

      You can see at 40 feet what most people can see at 20

    • B. 

      You can see at 20 feet what most people can see at 40

    • C. 

      You are legally blind

    • D. 

      You are far sighted

  • 32. 
    The eye part that allows animals to see in low light is called the ______.
    • A. 

      Retina

    • B. 

      Iris

    • C. 

      Tapetum

    • D. 

      Sclera

  • 33. 
    The ear part that controls balance, not hearing is the ______.
    • A. 

      Cochlea

    • B. 

      Semicircular canal

    • C. 

      Eustachian tube

    • D. 

      Eardrum

  • 34. 
    A screaming child produces about ______ decibels of sound.
    • A. 

      50

    • B. 

      80

    • C. 

      110

    • D. 

      140

  • 35. 
    The hormone that controls changes in boys at puberty is called ______.
    • A. 

      Estrogen

    • B. 

      Testosterone

    • C. 

      Amygdala

  • 36. 
    The muscle that holds the baby in the uterus is the ______.
    • A. 

      Vagina

    • B. 

      Fallopian tube

    • C. 

      Ovary

    • D. 

      Cervix

  • 37. 
    Erections always come before ejaculations.
    • A. 

      Always true

    • B. 

      Sometimes true

    • C. 

      Never true

  • 38. 
    Two STDs that cannot be cured are _________.
    • A. 

      Chlamydia and gonorrhea

    • B. 

      AIDS and HPV (warts)

    • C. 

      None of these can be cured

  • 39. 
    A picture of chromosomes that is cut apart and arranged in order of size is a _______.
    • A. 

      Chromosome map

    • B. 

      DNA diagram

    • C. 

      Karyotype

    • D. 

      None of these

  • 40. 
    Which statement is true?
    • A. 

      Girls have more genes than boys.

    • B. 

      Boys have more genes than girls.

    • C. 

      Girls and boys have the same number of genes-23.

  • 41. 
    When studying PTC tasting ability, which genotype does NOT allow tasting?
    • A. 

      TT

    • B. 

      Tt

    • C. 

      Tt

    • D. 

      Both A and B

  • 42. 
    Identical twins form when __________________.
    • A. 

      Two eggs are fertilized by sperm

    • B. 

      One egg is fertilized and splits

    • C. 

      An egg doesn't divide completely

  • 43. 
    Which blood type recessive?
    • A. 

      A

    • B. 

      B

    • C. 

      AB

    • D. 

      O

  • 44. 
    Most Americans have blood type _______.
    • A. 

      A

    • B. 

      B

    • C. 

      AB

    • D. 

      O

  • 45. 
    A producer is an organism that ____________.
    • A. 

      Eats dead animals and plants

    • B. 

      Eats only meat

    • C. 

      Makes its own food

    • D. 

      Has a cell membrane but no cell wall

  • 46. 
    Which of these is an herbivore?
    • A. 

      Giraffe

    • B. 

      Tasmanian devil

    • C. 

      Spider

    • D. 

      Robin

  • 47. 
    Which of these food chains is correct?
    • A. 

      Sunflower- mouse - hawk

    • B. 

      Hawk - mouse- sunflower

    • C. 

      Grasshopper - sunflower - mouse

    • D. 

      Mouse - grasshopper - sunflower

  • 48. 
    Which animals are at the top of food chains?
    • A. 

      Carnivores

    • B. 

      Herbivores

    • C. 

      Prey

    • D. 

      Omnivores

  • 49.