7th Grade Life Science
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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.
- 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.
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