Quarter 2 LIVING
THINGS AND THEIR ENVIRONMENT 6th
Grade Science Reviewer
50 Questions
with Answers
Direction: Choose the letter with the best answer.
Write your answer on your answer sheet.
1. What is the main
function of the musculoskeletal system?
- digestion of
food
- helps the body
absorb oxygen from the air.
- provides
support, body movement and protecting vital organs. *
- carries oxygen,
nutrients, and hormones to the cells.
2. Which is NOT a function of the skeletal system?
A.
produce blood cells.
B.
regulates body temperature. *
C.
provide a framework for body tissues.
D.
serves as a storehouse for minerals.
3. The following are types of muscles except _____________.
A.
smooth
B.
skeletal
C.
cardiac
D.
epithelial *
4. Which of the following is a skin pigment that protects
cells from sun’s radiation damage?
A.
dermis
B.
collagen
C.
melanin *
D.
keratin
5. Skin plays a role in _____________.
A.
storing minerals
B.
producing blood cells
C.
supporting the body
D.
regulating body temperature *
6. The layer of skin that contains tough connective tissue, hair follicles, and sweat glands.
A.
dermis *
B.
epidermis
C.
subcutaneous
D.
cuticle
7. When exposed to sunlight, skin can produce which vitamin?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin C
D.
Vitamin D *
8. Which of these is NOT a function of the digestive system?
A.
regulating metabolism *
B.
digesting food
C.
absorbing nutrients
D.
eliminating wastes
9. It is a series of wave-like contractions that move food to the
different processing stations in the digestive tract.
A.
swallowing
B.
digestion
C.
absorption
D.
peristalsis *
10. Digestion is completed, and food nutrients are
absorbed in the ___________________.
A.
stomach
B.
small intestine *
C.
large intestine
D.
rectum
11. Which system works as a support structure for your body?
A.
Nervous System
B.
Muscular System
C.
Digestive System
D.
Skeletal System*
12. What two systems provide form, stability, and
movement to the body?
A.
Digestive and Nervous
B.
Muscular and Circulatory
C.
Digestive and Integumentary
D.
Muscular and Skeletal*
13. What system consists of the skin, hair, and nails which protects the
body from various kinds of threats?
A.
Integumentary System*
B.
Nervous System
C.
Digestive System
D.
Muscular System
14. The spongy substance found in the center of the bones manufactures
red blood cells, white blood cells, and platelets.
A.
tendons
B.
bone marrow*
C.
joints
D.
ligament
15. It is the body’s largest organ that covers the entire outside of the body, forming a protective barrier
against pathogens and injuries from the environment.
A.
liver
B.
cartilage
C.
skin*
D.
tendons
16. It is a point or area where two or more bones meet.
A.
joint*
B.
tendon
C.
nerve
D.
cartilage
17. What is the smooth tissue that protects the end of bones at the
joints by preventing them from rubbing together?
A.
muscle
B.
tendon
C.
ligament
D.
cartilage*
18. It is the food-processing system of the body.
A.
Nervous system
B.
Digestive system*
C.
Skeletal system
D.
Muscular system
19. It is a hollow organ that holds and squeezes the food while it is
being mixed with gastric juices.
A.
small intestine
B.
esophagus
C.
stomach*
D.
liver
20. What do you call the process of breaking down of food into simple
nutrients that can be used by the cells of the body?
A.
digestion*
B.
respiration
C.
excretion
D.
circulation
21. What is the function of the digestive system?
A.
It is the framework of the body.
B.
It supports the skeleton and enables the body to move.
C.
It is the control center of the body.
D.
It takes care of digesting the food, absorbing nutrients, and
eliminating waste materials from the body. *
22. The hollow muscular organ is located between the esophagus and small intestine.
A.
liver
B.
pancreas
C.
stomach *
D.
diaphragm
23. The muscular tube through which food passes from the
pharynx to the stomach.
A.
small intestine
B.
large intestine
C.
rectum
D.
esophagus *
24. The part of the digestive system where most digestion and absorption of food takes place.
A.
stomach
B.
esophagus
C.
small intestine *
D.
large intestine
25. What organ of the digestive system absorbs water and vitamins while converting undigested food into feces?
A.
liver
B.
small intestine
C.
large intestine *
D.
rectum
26. What do you call the process of breaking down of food into simple
nutrients that can be used
by the cells of the body?
A.
circulation
B.
digestion *
C.
respiration
D.
excretion
27. What is the major organ of the respiratory system?
A.
brain
B.
lungs *
C.
heart
D.
kidneys
28. During inhalation, the diaphragm contracts and moves down, causing
the volume of the chest cavity to ________.
A.
increase *
B.
decrease
C.
relax
D.
stay the same.
29. These are a pair of bean-shaped organs that are the
body’s water control and blood-cleaning
plants.
A.
kidneys *
B.
lungs
C.
hormones
D.
enzymes
30. What is the basic unit or building block of the nervous system?
A.
nerves
B.
brain
C.
neuron *
D.
somatic
31. Which of the following animals is an invertebrate?
A.
earthworms*
B.
birds
C.
reptiles
D.
dolphins
32. The following animals are invertebrates except ____________.
A.
leeches
B.
snails
C.
spiders
D.
salamanders*
33. Which of the following is not considered a mollusk?
A.
earthworms*
B.
snails
C.
octopus
D.
squid
34. What group of animals do ducks, swans, and geese belong to?
A.
fishes
B.
amphibians
C.
birds*
D.
reptiles
35. Group of animals that comprises frogs, toads, newts,
and salamanders.
A.
fishes
B.
reptiles
C.
amphibians*
D.
mammals
36. These are underwater and cold- blooded animals that breathe through
gills, have scales and fins.
A.
fishes*
B.
reptiles
C.
amphibians
D.
invertebrates
37. Which of the following animals are cold-blooded?
A.
fishes and birds
B.
amphibians and reptiles*
C.
mammals and amphibians
D.
birds and reptiles
38. To which group of animals do whale shark belong?
A.
birds
B.
fishes*
C.
mammals
D.
reptiles
39. Which of the following is NOT a characteristic of reptiles?
A.
have scales
B.
breath under water using gills*
C.
usually lays eggs, sometimes live young
D.
cold-blooded
40. Why do whales belong to the group of mammals?
A.
Whales feed its young with milk from mammary glands.*
B.
Whales have feathers and wings for flying.
C.
Whales have moist smooth skin.
D.
Whales have scales and dry skin.
41. The following are major layers of the rainforest except _________.
A.
canopy
B.
sub-canopy
C.
understory and floor forest
D.
bedrocks *
42. These are trees that grow in coastal saline or brackish water.
A.
mangroves *
B.
corals
C.
atolls
D.
rainforest
43. These are made of limestones which is secreted by corals and deposited in a period of thousands
to millions of years.
A.
mangrove swamps
B.
coral reefs *
C.
rain forest
D.
all of the above
44. Mangrove swamps are found in the ___________ area.
A.
canopy
B.
sub-canopy
C.
coastal *
D.
coral reefs
45. A biologist climbs the tallest tree in a patch of rain forest. He is probably at the _______ layer.
A.
canopy *
B.
sub-canopy
C.
understory
D.
floor of the forest
46. The process in which gases in the atmosphere absorbs heat radiated from the Earth, forming a kind of
heat blanket around the
Earth.
A.
atmospheric blanket
B.
greenhouse blanket
C.
greenhouse gases
D.
greenhouse effect *
47. The greenhouse effect causes an increase in ____________.
A.
ozone
B.
oxygen
C.
carbon dioxide
D.
temperature *
48. A species whose numbers are so small that the species is threatened with
extinction is called a/an ______________.
A.
extinct species
B.
threatened species
C.
endangered species *
D.
mutated species
49. An animal species that is no longer existing.
A.
threatened
B.
endangered
C.
extinct *
D.
none of the above
50. Which of the following can destroy coral reefs?
A.
illegal dynamite fishing
B.
collecting corals
C.
pollution
D.
all of the above *
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