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NAT Reviewer For Science 6

The document contains a 40-item science review test with multiple choice questions covering topics in earth science, biology, chemistry and physics. The questions test knowledge of the layers of the Earth, physical and chemical changes, the human body systems (nervous, circulatory, respiratory, digestive), energy and food chains, and characteristics of planets, stars and climate change.

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CJ Sugam Allinagrak
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1K views5 pages

NAT Reviewer For Science 6

The document contains a 40-item science review test with multiple choice questions covering topics in earth science, biology, chemistry and physics. The questions test knowledge of the layers of the Earth, physical and chemical changes, the human body systems (nervous, circulatory, respiratory, digestive), energy and food chains, and characteristics of planets, stars and climate change.

Uploaded by

CJ Sugam Allinagrak
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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NAT Reviewer

for SCIENCE 6
1. The hottest interior layer of the earth is the inner core. Why?
a. Because it is composed of hot gasses.
b. Because it is composed of very hot tectonic plates.
c. Because it is the place where the ring of fire is formed.
d. Because it is where the iron and nickel heated intensely.
2. Which of the following describes the mantle layer of the Earth?
a. It is the Earths outmost layer.
b. It covers 67% of the Earths largest layer.
c. It is made up or nickel and iron.
d. It is the Earths outmost and thinnest layer of the Earth.
For items 3 and 4, refer to the examples of physical and chemical change in matter.
a. Ripening of fruits
d. Evaporating saltwater
b. Burning of wood
e. Sewing cloth into a dress
c. Cementing processes
f. Coconut water turning into vinegar

3. Which are examples of chemical change?


a. A, B, C
b. A, B, F
c. B, D, F
d. C, D, E
4. Which are examples of physical change?
a. A, B, C
b. A, B, F
c. C, D, E
d. D, E, F
5. Which part of the nervous system is responsible for carrying the messages around the system?
a. cerebellum
b. spinal cord
c. neuron
d. cerebrum
6. Which part of the nervous system that connects the brain and 4/5 of the spinal column?
a. cerebrum
b. nerve cells
c. neuron
d. spinal cord
7. Which of the following is known as the pumping organ that supplies blood with oxygen to our body?
a. lungs
b. gall bladder
c. stomach
d. heart
8. What is the function of leukocytes?
a. Transport oxygen from the lungs to the other parts of the body.
b. Transport messages to the brain.
c. Removes the wastes the can be found on veins.
d. Fight harmful bacteria that enter the body.
9. When a basketball is left to roll on the floor, the basketball slows down after a time and eventually stops.
What causes the basketball to slow down and stop?
a. gravity
b. force
c. magnet
d. friction
10. When a stone is thrown upward, its speed decreases in the sky until it stops and falls to the ground. What is
the force that counteract in the stone upward?
a. inertia
b. friction

c. centripetal force
d. gravity
11. What energy do we get from eating food?
a. radiant
b. electrical
c. chemical
d. solar
Refer to the illustration of the female reproductive system below to answer item 12 and 13.
3

4
2

12. The part 2 is known as birth canal. Why?


a. Because it receives sperm cells
b. Because it is where monthly menstrual blood flows out.
c. Because it is where the urine flows out.
d. In a normal delivery, new born baby passes out from it.
13. Which of the following is the function of part 3?
a. It channels the ripened egg from ovary to the uterus.
b. It filters the sperms and egg cells from entering the ovary.
c. It provides nutrients for the fetus inside the uterus.
d. It attaches the vagina to ovary.
14. Which of the following best explains what do our lungs do?
a. It serves as passage of air from nostril to the chest cavity.
b. It prevents the entry of food into the respiratory system.
c. It transports purified air to the blood streams.
d. It purifies the air that we breathe.
15 16. Study the diagram below.

15. The diagram represents the interdependence of plants and animals. What is the best way to sustain this
interdependence?
a. Change forest to industrial lands.
b. Catch animals and put them in cage.
c. Take care of animals and plant more trees
d. Cut trees because they are important in building establishments.
16. What is being illustrated in the diagram?
a. Plants are useless to animals.
b. Plants dont get anything from animals.
c. Plants benefit the animals while animals destroy them.
d. Plants are beneficial to animals while animals are beneficial to plants
17. In the cycle, what do you call the process that is involved when a man takes in oxygen?
a. respiration
b. transpiration
c. photosynthesis
d. hydration
18. How can you help conserve the marine life?
a. Dump garbage into seas and rivers.
b. Buy corals as souvenirs.
c. Use dynamite for fishing.
d. Stop cyanide fishing.

Study the chart below and answer number 19 and 20.


Planet
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto

Distance from Sun Diameter


relative to Earth
relative to Earth
.387
.382
.723
.949
1
1.0
1.524
0.523
5.203
11.19
9.529
9.26
19,19
4.01
30.06
3.88
29.73 49.73
.18

Mass Relative
to Earth
.055
.815
1
.107
317.8
95.3
14.6
17.23
.002

19. Which planet is the lightest?


a. Pluto
b. Jupiter
c. Venus
d. Mercury
20. Which planet is the largest?
a. Jupiter
b. Saturn
c. Neptune
d. Uranus
21. What is the correct sequence of a food chain?
a. Producer first order consumer second order consumer decomposer
b. Producer decomposerfirst order consumer second order consumer
c. First order consumersecond order consumer decomposer Producer
d. First order consumer second order consumer Producer decomposer
Below is an illustration of a food chain in a land community. Use this illustration in answering item 23-25

23. Which is an herbivore in the food chain?


a. Bacteria
b. Grasshopper
c. Frog
d. Snake
24. Which is not true about the illustration?
a. The process of eating and being eaten involves a series of organisms.
b. A food chain starts with the producer.
c. A food chain ends with the decomposer.
d. The amount of food increases as the number of consumers increases.
25. To what order of consumer does the frog belong in the food chain?
a. First-order consumer
b. Second-order consumer
c. Third-order consumer
d. Fourth-order consumer
Below is an illustration of a food web. Use this for item 26.

26. What does a food web show?


a. It shows a complex type of food chain.
b. It shows a fixed order of consumers.
c. It shows the growth of decomposers in the cycle.

d. It shows a continuous series of eating activities.


27. What benefit does our respiratory system give to our body?
a. It collects waste materials and transport nutrients to the cells.
b. It facilitates the release of carbon dioxide and helps the oxygen diffuse in blood.
c. It digests all the food substances.
d. It protects the body and fight microorganisms that can cause ailments.
28. Functions of the urinary system include all of the following except:
a. Regulating blood volume.
b. Conserving nutrients by preventing their excretion in the urine.
c. Regulating plasma concentrations of ions by controlling the amount lost in the urine.
d. Regulating blood pressure.
29. Structurally, a kidney is__________________.
a. Approximately the size of a full gall bladder.
b. Soft enough to change shape dramatically in response to the activity of abdominal organs that might
constrict it.
c. Covered by four capsular layers.
d. Kidney-bean shaped.
30. The action that happens without our thinking about it is _____.
a. Receive action
b. Reflex action
c. Retract action
d. Reverse action
Below is a diagram of the heart. Use this illustration for item 31 - 32.
1
2
3

5
6
7

4
31. Which part of the heart that contracts and pumps the blood containing rich oxygen to all parts of the body?
a. 4
b. 5
c. 6
d. 7
32. Which part of the heart that contracts and forces the blood out of the heart to the lungs?
a. 7
b. 6
c. 3
d. 2
33. _______________ is the abnormal rise in the earths temperature.
a. Global warming
b. Greenhouse effect
c. Acid rain
d. Ozone hole
34. Why is Polaris a useful star?
a. It can be used to find directions.
b. It can be used by fortune tellers to predict the future.
c. It can be used to determine which period of the year is good for planting.
d. It is used as a good source of information.
35. Chemical spray is harmful to the environment. Why?
a. It affects the clouds.
b. It pollutes the rivers and oceans.
c. It destroys the ozone layer.
d. It destroys our clothes.
36. It is believed to be made of solid materials. It has a diameter of about 2, 560 to 2, 880 kilometers.
a. Outer core

b. Inner core
c. Mantle
d. Crust
37. This is a liquid rock where the crustal plates are said to float over.
a. Asthenosphere
b. Magma
c. Earth
d. Mantle
38. Most animals sleep during winter, what do we call this?
a. Camouflage
b. Hibernation
c. Estivation
d. Rainy season
39. What similar characteristics do papaya and banana have?
a. They have numerous numbers of stems that arise from the ground.
b. They lean on something to get an upright position.
c. They have woody stems and bark.
d. They have soft and long and cylindrical in shape and have single stem.
40. Which of the following states true characteristics of grasses?
A. Roots are fibrous
B. Leaves has parallel veins
C. Stems are woody and hard
D. Branches are climbing and thorny
a. A and B
b. B and C
c. A and D
d. C and D

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