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8th Grade Life Science Quiz

Total questions: 40

Worksheet time: 27mins

Name
Class
Date
1.
What is another word that can be used to describe "homeostasis"?
a)
STABLE
b)
EQUAL
c)
COMPLETE
d)
CORRECT
2.
If the environment gets cold, we will often shiver in order to:
a)
keep body temperature the same as the external temperature
b)
decrease body temperature
c)
increase body temperature
d)
regulate blood pressure
3.
Our bodies try to maintain a constant temperature of about:
a)
100 °F
b)
98.6 °F
c)
75 °F
d)
20 °F
4.
The coordination of activities in an organism that maintain homeostasis in a constantly changing environment is called:
a)
regulation 
b)
digestion
c)
synthesis
d)
respiration
5.
The maintenance of an organism’s internal environment is called:
a)
compensating
b)
homeostasis
c)
balancing
d)
routine
6.
Name the levels of organization in the human body in order from smallest to largest:
a)
Tissue, organ, organ system
b)
Organ system, tissue, organs, cells
c)
Cells, tissue, organs, organ system
d)
Cells , organs, tissue, organ system
7.

What substance transports substances around the body?

a)

Blood

b)

Sweat

c)

Tears

d)

Urine

8.

What process includes the evaporation of a liquid to cool the body?

a)

Shivering

b)

Sweating

c)

Vasodilation

d)

Vasoconstriction

9.
Which diagram represents an organ?
a)
#1
b)
#2
c)
#3
d)
#4
10.
Which organelle performs PHOTOSYNTHESIS?
a)
Chloroplast
b)
Mitochondria
11.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
12.
What process occurs when light energy is captured in autotrophs and converted into sugar?
a)
Photosynthesis
b)
Cellular Respiration
13.

What is the ultimate ORIGINAL source of energy for living things?

a)

Sugar

b)

Sun

c)

Moon

d)

Carbon Dioxide

14.

Cellular respiration takes place in which organelle?

a)

nucleus

b)

cytoplasm

c)

ribosomes

d)

mitochondria

15.
Which is not a waste product of cellular respiration?
a)
Water
b)
Heat
c)
Carbon Dioxide
d)
Oxygen
16.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
17.
Which of the following best describes photosynthesis?
a)
Photosynthesis converts radiant energy into chemical energy.
b)
Photosynthesis produces carbohydrates.
c)
Plants need sunlight, carbon dioxide, water, nutrients, and chlorophyll to complete photosynthesis.
d)
Plants use chlorophyll, water, and carbon dioxide to make sugar.
18.
What chemical reaction has almost the same products and reactants as cellular respiration but reversed?
a)
Rusting
b)
Photosynthesis
c)
Combustion
d)
Symphonies
19.
What is the purpose of cellular respiration?
a)
to break down food
b)
to create energy in the body
c)
to release energy from food
d)
there is none; it's a waste of time
20.
Tissues are made of one or more _________________  working together. 
a)
Cells
b)
Tissues
c)
Organs
d)
Organ Systems
21.

Which organ system provides structure for the human body and produces blood?

a)

Muscular System

b)

Skeletal System

c)

Excretory System

d)

Circulatory System

22.

Which organ system delivers nutrients, oxygen, and cellular waste to all parts of the human body?

a)

Muscular System

b)

Skeletal System

c)

Excretory System

d)

Circulatory System

23.

Which organ system is most responsible for movement in an organism?

a)

Muscular System

b)

Skeletal System

c)

Excretory System

d)

Circulatory System

24.

Which organ system transmits signals between parts of the body?

a)

Nervous System

b)

Skeletal System

c)

Digestive System

d)

Circulatory System

25.

Which system is responsible for breaking down food and aids in the absorption of nutrients?

a)

Nervous System

b)

Skeletal System

c)

Digestive System

d)

Circulatory System

26.
The endocrine system communicates to the body using....
a)
electrical signals
b)
soluble gases
c)
digestive enzymes
d)
chemical hormones
27.

What three body systems get rid of waste from our bodies?

a)

Respiratory, Reproductive, and Circulatory

b)

Digestive, Excretory, and Respiratory

c)

Digestive, Reproductive, and Circulatory

d)

Excretory, Reproductive, and Endocrine

28.

The large intestine is part of the digestive system. What is the main function of the large intestine?

a)

Remove body fat

b)

Remove urine

c)

Remove solid waste

d)

Remove water

29.

Where does cellular gas exchange happen?

a)

Heart

b)

Between the Heart and Aorta

c)

Between the Lungs and Heart

d)

Between the Alveoli and Capillaries around the lungs

30.
Which of the following examples is a function of the reproductive system?
a)
Circulating blood
b)
Produce Oxygen
c)
Absorb Nutrients
d)
Produce eggs in females
31.

Which organ system is responsible for the creation of urine?

a)

digestive system

b)

endocrine system

c)

excretory system

d)

reproductive system

32.

What is a neuron?

a)

smallest cell of the nervous system

b)

a cell that transmits electrical signals

c)

a nerve cell

d)

all of these

33.

What organ or organs are part of the central nervous system?

a)

the brain

b)

nerves, ganglion, and spinal cord

c)

brain and spinal cord

d)

the lymph nodes

34.

What is the correct path of urine from creation to expulsion from the body?

a)

blood, urethra, ureter

b)

kidneys, ureters, urinary bladder, urethra

c)

urethra, bladder, kidneys, liver

d)

spleen, liver, bile, large intestine

35.

What is the correct path of an unfertilized egg traveling through a female's body?

a)

ovary, through the opening of the cervix, urethra

b)

ovary, seminal vesicles, vagina

c)

stomach, uterus, urethra

d)

ovary, fallopian tube, uterus, through the opening of the cervix, vagina

36.

What kind of muscle is found in the heart?

a)

smooth

b)

cardiac

c)

voluntary

d)

nervous

37.

Which branch of the circulatory system transports deoxygenated blood to from right side of the heart to the lungs for oxygenation?

a)

Pulmonary Circulation Loop

b)

Systemic Circulation Loop

38.

What are the thinnest, smallest, and and most common blood vessels of the body?

a)

capillaries

b)

arteries

c)

veins

d)

ventricles

39.

The human heart has _____ chambers.

a)

2

b)

6

c)

4

d)

8

40.

What are ways to keep your immune system healthy?

a)

eat healthy foods like fruits, veggies, and yogurt

b)

stay away from drugs, tobacco, and alcohol

c)

all of these

d)

wash your hands and cover any breaks in the skin

e)

stay hydrated

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