GED SCI Pretest

ข้อสอบตัวอย่าง GED Science ครอบคลุมทุกทักษะ จำนวน 15 ข้อ วัดระดับความพร้อมในการสอบ GED Science

1 / 18

What will happen if an atom gains an electron ?

Its charge would become negative.

Its charge would become positive.

Its charge would remain neutral.

The charge is impossible to determine without further information.

2 / 18

Which of the following is an example of an organism ?

river

mountain

tree

sunlight

3 / 18

Which of the following is the best example of Newton's first law ( the law of inertia ), which states that an object at rest stays at rest and an object in motion stays in motion at the same speed in the same direction unless acted upon by an unbalanced force ?

a train slowing to a stop as it enters the station

the recoil of a cannon when cannonball is fired into the air

a skydiver who has already reached terminal velocity and is falling at a constant speed toward the ground

a rocket blasting off on its way to the moon

4 / 18

Which of the following systems includes the plants and animals of Earth ?

lithosphere

biosphere

hydrosphere

atmosphere

5 / 18

What type of intramolecular bonding occurs when carbon reacts with hydrogen to make methane gas ?

ionic bonding

hydrogen bonding

carbon bonding

covalent bonding

6 / 18

What is the main function of the red cells ?

They carry oxygen to all the cells of the body, where it is used during photosynthesis.

They carry oxygen to all the cells of the body, where it is used during cellular respiration.

They produce antibodies that help protect the body from infectious diseases.

They make the blood appear red.

7 / 18

The maximum number of individuals of a particular species that the ecosystem can handle is known as

predation

natural selection

the carrying capacity

biodiversity

8 / 18

If the block has a mass of 2 kg and the pulling force and the frictional force acting on the block both equal 20 N, what is the acceleration of the block ?

0 m/s^2

10 m/s^2

40 m/s^2

The acceleration cannot be determined without additional information.

9 / 18

A recessive trait (aa) appears in 25% of offspring from two parents.
What are the most likely genotypes of the parents?

10 / 18

The year can be split into four seasons ( spring, summer, autumn and winter ), which are marked by particular weather patterns and daylight hours. What is the main factor that causes the change in the seasons ?

the distance of the Earth from the sun

global warming

the tilt of the Earth's axis of rotation

movement of tectonic plates

11 / 18

A ball rolling on a flat surface slows down over time. Which force is mainly responsible for this?

Gravity

Friction

Magnetism

Nuclear force

12 / 18

A ball rolling on a flat surface slows down over time. Which force is mainly responsible for this?

13 / 18

A scientist studies two types of cells. Cell Type A produces large amounts of ATP, while Cell Type B produces very little.

Which statement best explains the difference?

Cell A has more mitochondria than Cell B.

Cell B has more chloroplasts than Cell A.

Cell A uses anaerobic respiration only.

Cell B stores more glucose than Cell A.

14 / 18

Which of the following correctly represents the progression of life on Earth according to the fossil record, from earliest life forms to the most recent ?

fish, amphibians, birds, reptiles, mammals

amphibians, fish, reptiles, mammals, birds

fish, amphibians, reptiles, birds, mammals

fish, reptiles, amphibians, mammals, birds

15 / 18

Which of the following always stays the same when a chemical reaction takes place ?

the amount of gas

the number of molecules

the number of atoms

the temperature

16 / 18

Which of the following correctly represents the hierarchy in living organisms, classified from smallest to the largest ?

cell, organelle, tissue, organ system, organ, organism

cell, tissue, organ system, organ, organelle, organism

organism, organ system, organ, tissue, cell, organelle

organelle, cell, tissue, organ, organ system, organism

17 / 18

The human body system that transports nutrients dissolved in the
blood to all the cells of the body is called the

digestive system.

integumentary system.

circulatory system.

muscular system.

18 / 18

Which organelle is found only in plant cells and helps the plant to
produce its own food via photosynthesis?

cell wall

vacuoles

mitochondria

chloroplasts

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