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Science Subject Grade 6 All Thailand Evaluation Test

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Thailand Educational Development and Evaluation Tests 2019 (TEDET)

All Thailand Evaluation Test

Science subject Elementary Grade 6

Name - Surname School

1. The following images display various stages of

human growth and development.

6 weeks 3 months 6 months 9 months

2 weeks 1 year 5 years Grown child

After birth (Early childhood)

Teenager Early Late Elderly

adulthood adulthood

Which of these is the incorrect explanation?

1 Among the stages of human growth, the age

range between 0 - 1 years is the period that has

the fastest growth.

2 Children old enough to attend schools are

cognitively and socially functional.

3 Teenagers undergo rapid physical and mental

growth.

4 Human bodies begin to enter the elderly

stage right after early adulthood.

5 The 9 months inside the mother’s womb

are included in the age count of a child’s 1st

year of life.

Gestational

age

Remark 1. There are 30 Science questions in total.

2. The Science questions have special answer choices,

a single question may have more than 1 correct

answer.

3. Caution. If a question has more than 1 correct

answer, students must choose all the correct answers

to receive points.

4. The time limit for this Science exam is 90 minutes.


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2. Colored water is inserted into a container as shown

in the given image. Then, the (rubber bulb) hand

pump is squeezed to suck up the fluids. This

represents a certain human bodily function.

Which of these correctly matches the hand pump,

rubber hose, and colored water with various parts

of the human body?

Hand pump Rubber hose Colored water

1 Lungs Blood vessels Blood

2 Lungs Blood vessels Oxygen

3 Lungs Muscles Oxygen

4 Heart Blood vessels Blood

5 Heart Muscles Oxygen

3. Based on the conclusions

of the experiment by each

student, which of these

students correctly

described how the experiment was conducted?

1 Matthew: The beansprouts on the left

received sunlight and water.

2 William: The beansprouts on the right

received sunlight but did not received water.

3 Arthur: The beansprouts on the left was covered

with a piece of black cloth so it did not receive

any sunlight, but it did received water.

4 Hugo: The beansprouts on the right was

covered with a piece of black cloth so it did

not receive any sunlight, and also did not

receive any water.

5 Potter: The two beansprouts are of different

types so they have a different color.

4. Which of these animals use a self-protection

method that is different from the rest?

1 2

▲ Puffer fish ▲Caterpillar

3 4

▲ Mackerel ▲Leaf insects

5

▲ Orchid mantis

5. Which of these incorrectly describes the

environmental impacts of road construction for

the convenience of human travel?

1 The ecosystem is threatened by an increase in

car traffic.

2 A safe habitat is created for wildlife.

3 Many natural disasters may occur, such as

landsides or floods.

4 The increasing number of vehicles can add stress

for the wildlife.

5 Inefficient road construction can destroy natural

resources such as trees.


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6. The given pie chart displays the ratio of substances

inside the human body.

Based on the , which of these contain

all the correct descriptions of substance A?

1 ⓐ 2 ⓑ, ⓒ 3 ⓑ, ⓓ

4 ⓒ, ⓓ 5 ⓑ, ⓒ, ⓓ

7. The following figure displays

the human digestive tract.

Which of these does not

accurately describe its

functions?

1 At D, only mechanical

digestion occurs.

2 Bile is produced at A and are stored at B; it

contains enzymes used to break down fats.

3 There are enzymes that digest starch, protein,

and fat in the gastric juices produced at F.

4 C is about 7 meters long. The 3 main nutrients

are digested until they can be absorbed into

the body.

5 G absorbs water from leftover foods, helps to

reduce the volume of leftovers, then expel

them out through the anus.

8. [Figure 1] is a model to help learn about the

principles of breathing.

[Figure 2] displays the organs in the human

respiratory system.

[Figure 1] [Figure 2]

Which of these correctly describes the situation

that occurs when the hand is let go at D at [Figure 1]

in relation to [Figure 2]?

1 The diaphragm raises up, causing the volume

of the lungs to increase and allowing air to enter

the body.


of the lungs to decrease and allowing air to

enter the body.

3 The diaphragm lowers, causing the volume of

the lungs to increase and allowing air to enter

the body.


of the lungs to decrease and allowing air to

escape the body.

5 The diaphragm lowers, causing the volume of

the lungs to decrease and allowing air to enter

the body.

ⓐ Mainly used as an energy source

ⓑ Used for driving out waste

ⓒ Is responsible for appropriately adjusting

body temperature

ⓓ Transport various nutrients as well as Carbon

Dioxide gas

Example

Example


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9. The following chart displays the estimated

amount of energy needed per 1 day for humans

by age and gender.

Based on what can be realized through the

information above, which of these is incorrect?

1 The amount of energy needed for male and

female aged 1-2 years old is similar.

2 The age range that requires the most amount

of energy is between ages 15-18 years old.

3 After childhood, the energy needed per day

will decrease little by little.

4 The amount of energy needed during

childhood and adolescence (teenage years)

increases from infancy.

5 After the ages from 3-5 years old, men need

to receive more energy than women.

10. The diagram displays the relationships between

components of the ecosystem according to the

direction of arrows,

�

Which of these cannot be known based on

information from the diagram?

1 The various components in the ecosystem

all have an influence on each other.

2 Rabbits live by consuming clover flowers

to receive essential nutrients.

3 Rice, rabbit, grasshopper, and sunlight are

decomposed by fungus.

4 Sunlight, water, and air all have an influence

on production of food for plants as well as

the development and growth of animals.

5 The environment and environmental factors

make up an ecological system that is closely

related.


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11. The following text is a news release about social

problems.

Which of these is the most correct fact that can

be known from the news release?

1 When people age, their body will become

weaker.

2 Many people died due to global warming

caused by environmental pollution.

3 Global warming on Earth is a natural

phenomenon.

4 Natural disasters have taken many people’s

lives.

5 The death of the elderly is an issue that has

not yet been resolved.

12. The following image is not a normal route used

for traffic, but it is a forest path in which people

have stepped on the grass until a trail is created.

Which of these is the incorrect method that

people must try in order to restore the damaged

ecosystem as well as its consequences?

1 Be careful not to travel along trails not

considered a normal route.

2 Soil must be added as more cover to prevent

the roots of the trees from appearing above

ground.

3 Restoration of destroyed natural areas can be

done quickly and easily.

4 Specify and notify the period of time in which

travel is prohibited until the plants can regrow

on traffic paths.

5 The locals, environmental organizations, and

the government must all work together to

restore the ecosystem.

The Perfect Crime One victim, no perpetrator, and no motivation behind

the crime.

In 2005, An elderly man aged 80 years old was found dead in his own home. No injuries were found on the body, and no signs of trespassing or murder were present. Thus, the investigation concluded that the death was an incident that commonly occurs with the elderly, which is chronic illness. A few days later, another body was found dead in the public park. The victim is a female aged 60, with a 2.5 – 3 cm wound on the right side of her head. This incident is still a mystery and has not yet been resolved, mainly due to the lack of witnesses and motivation for the cause of death. Later, 19 more bodies were found in a span of a single month. All of the incidents of these deaths all occurred between 12 – 4 pm, which made people believe that there is a serial killer targeting the elderly aged 70 years and above who lives alone. 3 months later, a body was found floating along the river in New Orleans. Along that time, 67 people were found dead in a single day. These deaths were so depressing to handle to the point that it led 2 police officers who were responsible for the case, who dealt with handling the deaths which happened every day, to commit suicide. This further caused hundreds of people to become disheartened and hopeless. These certain cases of death happened all over the world, causing the population to fear death even more. Many events happened in 2005. Earth became warmer, in which that period was recorded as having the highest temperature in human history. Between 12 – 4 pm, the time during which the elderly passed away the most, is a period with extremely high heatwaves. When the temperature of the Atlantic Ocean increased, hurricane ‘Katrina’ formed in the Lantin America region, causing floods and landslides that resulted in unprecedented damage to cities.

“These are deaths and crime that we all acknowledge, but we cannot claim responsibility from anyone. The changes in temperature all over the world can perhaps be called a new form of the

perfect crime.” – Christopher Flavin, Worldwatch Institute –


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13. An experiment was conducted to find the

effect that pollution have towards the

germination of seeds. Which of these is not

one of the procedures and experiment results?

1 Add diluted sulfuric acid solution to a petri

dish, then add water to another petri dish.

2 Place a piece of filter paper onto the petri

dish, then put in the seeds in different

quantities.

3 Close the lid of the petri dish, then keep it

at a warm area.

4 Count the number of germinated seeds in

both the two petri dishes at the same time

every day for a week.

5 Most of the seeds cannot germinate in the

petri dish containing sulfuric acid, but most

of the seeds can germinate in the petri dish

containing water.

14. The following information are the procedures

and time needed to completely digest food

inside our bodies.

When we eat food, after the food have entered our

mouths, they will be chewed using our teeth and

become mixed with saliva from our tongues. After

that, the food goes through the esophagus and

directly towards our stomach. The stomach has the

characteristic of a large muscle bag where food will

be mixed with digestive juices produced by the

stomach through contractions.

During this process, carbohydrates from food such as

rice or bread will be sent from the stomach to the

small intestine using around 3 hours. Food with fat as

a component will be sent to the small intestine using

around 6 hours. Food that enters the small intestine

will dissolve into nutrients with small molecules, then

absorbed into the small intestines using around 4 – 5

hours.

Food waste (fibers) left from the small intestine will

then be sent to the large intestine. The large intestine

is responsible for sucking up the moisture from the

food waste. After this, the food waste is driven out of

the body in the form of excrement (feces). The time

spent before reaching the final stage differs slightly

depending on the food eaten, but it usually requires

around 9 – 15 hours.

The consideration of time spent digesting food in our

bodies are used for scientific examinations. The

consideration of digestive conditions left in the

human stomach or intestines (victim) of murder or

accidents can help in the determination of when the

victim passed away, the food

eaten before death, or time

passed after death.


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Which of these correctly describes the use of

digestion in scientific investigations?

1 Digestion of food within our bodies takes

approximately around 6 hours.

2 There are only 2 organs that are involved in

the digestion of food within our bodies, so

they can easily be used for fact checking

and bodily examinations.

3 The investigation to find out what foods

were eaten a few hours before someone

passed away is not important in the process

of investigating the truth behind incidents of

death.

4 If there any bread or rice that cannot be

digested left in the stomach, it means that

the person died not less than 5 hours after

eating those bread or rice.

5 Due to the fact that time spent on digestion

within the body varies according to

nutrients involved, if we know the level in

which carbohydrates and fat were digested,

we will be able to predict the time when

the victim died.

15. The following information is about environmental

hormones, also known as endocrine disruptors.

Which of these correctly analyzes and predicts

the above information according to the logical

reasoning?

1 Environmental hormones are included in

pesticides.

2 Environmental hormones are naturally

occurring.

3 Environmental hormones act similar to normal

hormones in the body.

4 When environmental hormones enter the

body of a living organisms, it cannot be easily

expelled.

5 Environmental hormones interfere with

women’s menstrual cycle and the creation of

female reproductive cells.

[Specific properties of environmental hormones]

Environmental hormones are groups of chemicals

that live in the environment around us. Once it

enters our bodies, It will mimic reactions the same

way as hormones.

[Example of damage caused by environmental

hormones]

Bald eagles exposed to pesticides have a

decreased rate of eggs incubation.


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16. Water is poured into containers with different

shapes. Which of these is the properties of water

that can be known from this experiment?

1 The hand can be used to hold water.

2 Water cannot be seen using our eyes.

3 Water does not change its shape.

4 The volume of water changes according to

the shape of the container.

5 The shape of water changes according to

the shape of the container.

17. The balloon is weighed before and after

pumping air into it.

A. Before pumping in air B. After pumping in air

Based on the result of this experiment, which of

these correctly matches the heavier version of

the balloon and the properties of air that

affected the experiment?

1 A, air moves

2 A, air has weight

3 B, air has weight

4 A, air occupies volume

5 B, air occupies volume

18. The following image displays a salt field farm.

Which of these contains all the correct actions

that matches the way salt is extracted from

seawater?

1 ⓐ 2 ⓑ 3 ⓓ

4 ⓐ, ⓒ 5 ⓑ, ⓓ

19. Based on the changes of the following substances

in the answer choices, which of these are

considered chemical changes?

1 Steel rusting

2 Food spoiling (rotting)

3 Sugar dissolving in water

4 The smell of perfume diffusing (spreading)

5 Creating patterns on wood using a hot iron

ⓐ Drying clothes

ⓑ Gold panning

ⓒ Drying our hair with a hair dryer

ⓓ Separating the protein from soybean

water when making tofu


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20. The following image shows a sea cleanup using

oil absorbent pads in separating the oil from

seawater. Which of these is the correct reason

of how the oil can be cleaned up by using oil

absorbent pads as shown in the image?

1 Water and oil mix well together.

2 The absorbent pads can completely

separate salt from seawater.

3 The absorbent pads can absorb both water

and oil.

4 Oil does not mix with water; oil will float

above water.

5 The absorbent pads are responsible for

pulling the oil under the water upwards.

21. Which of these incorrectly describes the following

experiment?

1 All the foam in experiments A and B will

disappear.

2 The soap is alkaline, the vinegar is acidic.

3 In experiment A, if the vinegar is added to the

resulting foam, the foam will stay the same.

4 In experiment B, if the vinegar is added to the

resulting foam, the foam will stay the same.

5 After experiments A and B, if red cabbage

indicators are added onto the foam of both

experiments, the foam in experiment A will

have a darker red color.

A

B

Rub the soap with the

sponge until foamy,

then add 2-3 drops

of vinegar onto the

resulting foam formed.

Add bathroom detergent onto

the sponge after foaming, then

add 2-3 drops of vinegar onto

the resulting foam formed.


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22. Charlie found 3 beakers all filled with three types

of clear colorless liquids (A, B, C) on a table in

the science lab, in which there is a note placed

right beside the beakers.

A B C

After reading the message in the note, which

of these correctly matches the liquids to the

label.

1 A: Water

B: Diluted hydrochloric acid

C: Diluted sodium hydroxide solution

2 A: Water

B: Diluted sodium hydroxide solution

C: Diluted hydrochloric acid

3 A: Diluted hydrochloric acid

B: Water

C: Diluted sodium hydroxide solution

4 A: Diluted hydrochloric acid

B: Diluted sodium hydroxide solution

C: Water

5 A: Diluted sodium hydroxide solution

B: Diluted hydrochloric acid

C: Water

23. Which of these incorrectly describes about the

movement of sound?

1 Divers can hear the sound of boats or ships

from underwater.

2 We hear the sound that moves through the

air using our ears.

3 If we place our ear against a metal bar, we can

clearly hear the sounds knocking on the bar.

4 Sound moves only through solids and gases

but not through liquids.

5 If we place our ear against a desk, we can hear

the sounds knocking on the desk because

sound can travel through wood.

The three types of liquids are water, diluted

hydrochloric acid, and diluted sodium hydroxide

solution.

When adding phenolphthalein solution to all

3 liquids, only A and C will remain the same,

while B will change its color to red.

If blue litmus paper is used on the liquids,

A and B will remain the same, only C will

change its color to red.


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24. The following are situations that happen because

of noise disturbances between apartment floors.

In recent years, disturbances between

apartment floors have became a serious social

problem in South Korea.

Which of these is not a way to reduce conflicts

caused from noise disturbances among

apartments?

1 Attach soft materials to doors and closing

them gently.

2 Apply soundproof sheets on the floor,

always walk softly and slowly.

3 In the case of many people living closely

together, understanding between neighbors

should be established in advanced.

4 Attach soundproofing pads to chair legs,

and lift the chair off the ground when

moving it around.

5 Use a vacuum cleaner instead of a broom

to prevent dust from spreading all over the

room during nighttime.

25. The following information is about different areas

and residents living near the airport.

Which of these are the correct explanations?

1 Irregular sleep disorder is not related to noise

disturbances from the airport.

2 Prohibiting nighttime flights have a good effect

on insomnia (disorder preventing sleep).

3 After the construction of the airport, are A and

area B both suffered problems.

4 Noise disturbances are associated with cases of

high blood pressure, digestive conditions and

diseases, neurosis (anxiety disorders), and

insomnia.

5 In order to clearly determine the damage from

airplane noise disturbances to those who live

in area A, those living in area B must also be

considered.

Example 1 In September 2018, Mr. A, aged 59 and living in an apartment in the Yuseong district of Daejeon city in South Korea, was furious due to noise from his upstairs neighbor. He went up to confront the neighbor upstairs and threaten him with a weapon. The court then sentenced Mr. A to 6 months in prison and 1 year of probation.

Example 2 In July 2017, a man aged 60 years living on the 4th floor of an apartment building in the Nowon district of Seoul in South Korea, aimed a weapon to his upstairs neighbor. This conflict was caused from noise disturbances and complaints, finally resulting in murder. This man claimed at the trial that he had acted unintentionally under the influence of emotions. In the past year, the number of noise complaints steadily increased up to 30,000 cases, with a total of more than 100,000 cases in the last 5 years in South Korea.

Area A is right next to the airport runway, area B is

close to the airport but cannot hear the sound of

airplane.

Nighttime flights are prohibited on the 4th year since

the opening of the airport.

The following graphs are surveys of the average drug

dosage that a single person who lives in two areas

consume every year for 8 years, before and after

the airport was constructed.


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26. The following image shows the characteristic of

a road that have been damaged by an

earthquake.

Based on the text above, which of these

contain all the correct points?

1 C 2 A, B 3 A, C

4 B, C 5 A, B, C

27. Jenny set up a dry bulb thermometer and a

wet bulb thermometer as shown in the image

inside a laboratory. After 10 minutes have

passed, the temperature shown on both

thermometers are observed. It turns out that the

dry bulb thermometer shows a temperature of

26 °C and the wet bulb thermometer shows

a temperature 24 °C.

▲ Temperatures measured from dry – wet bulb thermometer

Based on the table displaying the moisture

percentages below,

Which of these is the moisture percentage in the

laboratory?

1 50% 2 83% 3 84%

4 92% 5 100%

Dry bulb

temperature

(oC)

The difference between wet-dry bulb

temperature (oC)

0 1 2 3 4 5 6 7

27 100 92 84 77 70 63 56 50

26 100 92 84 76 69 62 55 48

25 100 92 84 76 68 61 54 47

24 100 91 83 75 68 60 53 46

A. The medium of seismic waves is soil.

B. As the seismic waves spread, energy will be

transmitted.

C. This is a phenomenon in which storms cause

earthquakes and ripples then transmit energy.


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28. The horizontal coordinate system is a system

that specifies the position of stars using

horizontal planes as the criterion, and display

the position of the star using the northern

direction as a criterion. Which of these correctly

explains star S on the horizontal coordinate

system?

1 The altitude of star S is 30o.

2 The azimuth of star S is 250o.

3 If the time of observation changes, the

altitude and the azimuth of star S will not

change.

4 If the position of the observer changes, the

altitude of the star S will not change, but

the azimuth will change.

5 When displaying the position of the stars

using the horizontal coordinate system, we

must specify the position of observation as

well as the time of observation.

29. Fishermen who fish using sailboats out into the

sea by using wind power and wind direction does

not waste any fuel. When determining the

conditions of fishing by sailboats using the

following information, at which time will the

fisherman have to leave and return to the shore?

Time to leave from shore Time to return to shore

1 Between 6 – 7 o’clock Between 16 – 17 o’clock





The wind that is most beneficial to fishermen is the

wind that blows in the direction the boat is sailing

towards. The absence of wind is a positive thing for a

different scenario.

It is dark at night, which makes it difficult for fishermen

to fish and could lead to them getting lost.

Wind blows from areas with low temperatures toward

areas with high temperatures.

The following graph is a graph that measures the

change in temperature of sand and water within one

day. Therefore, it can be assumed that sand is land

and water is the sea.


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30. The following is information about floods that

have occurred in many countries. The image is

the damage from the flood that occurred in an

old city of one certain country.

Which of these methods can reduce the damage

from flooding when planning a new city layout?

1 Increase drainage facilities.

2 Limit the number of floors of buildings.

3 Build an artificial lake in the city.

4 Reserve sufficient green space for the city.

5 Build smooth roads using asphalt and cement.

[Information 1]

Normally, the amount of rainfall in the desert in 1

year is usually no more than 250 milliliters. This is a

phenomenon in the desert that humans discovered,

as people would believe that floods cannot occur

in the desert. Flooding occurs in areas with heavy

rain and becomes severe during specific seasons.

Korea has heavy rain in the summer, and the reason

why the country possesses many dams is because

of the frequent floods.

[Information 2]

Cherrapunji, an area located to the northeast of

India, is an area with average rainfall of 11,430

milliliters per year, which is the highest rate of

rainfall in the world. Due to many places in the

world lacking in water, this might be seen as a good

thing for Cherrapunji in times of crisis. However, this

is not the case. In 1 year, Cherrapunji went through

26,000 millimeters of rain which is more severe

during the summer. Cherrapunji does not have any

facilities that can store water or allow water to drain

quickly into the sea. Therefore, the area often had

to deal with large floods during the summer.

[Information 3]

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