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VANDA Review Paper Grade 8

The document is a review paper for Grade 8 science, consisting of 15 multiple-choice questions covering topics such as electricity, physics, chemistry, biology, and environmental science. Each question has one correct answer, and students are instructed to show their working on a separate sheet if needed. The test is designed to assess students' understanding of fundamental scientific concepts within a 60-minute timeframe.

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21 views4 pages

VANDA Review Paper Grade 8

The document is a review paper for Grade 8 science, consisting of 15 multiple-choice questions covering topics such as electricity, physics, chemistry, biology, and environmental science. Each question has one correct answer, and students are instructed to show their working on a separate sheet if needed. The test is designed to assess students' understanding of fundamental scientific concepts within a 60-minute timeframe.

Uploaded by

soutsalyvong.katty
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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VANDA Science Review Paper - Grade 8

Instructions:

- Duration: 60 minutes

- Total Questions: 15

- Each question has only one correct answer

- No calculators allowed

- Show working on a separate sheet if needed

Q1. A 3 and a 6 resistor are connected in parallel, and this combination is connected in series with

a 3 resistor. What is the total resistance?

A. 3

B. 4

C. 5

D. 6

Q2. An object of mass 2 kg is lifted vertically to a height of 5 m. What is the work done against

gravity? (Take g = 10 m/s)

A. 10 J

B. 50 J

C. 100 J

D. 200 J

Q3. A mirror produces an image that is upright and the same size as the object. The mirror is likely

a:

A. Concave mirror (object at focus)

B. Plane mirror

C. Convex mirror

D. Concave mirror (object beyond 2F)


Q4. A block slides down a frictionless slope. Which of the following remains constant?

A. Kinetic energy

B. Potential energy

C. Total mechanical energy

D. Velocity

Q5. Which of the following is not a compound?

A. Water

B. Oxygen

C. Sodium chloride

D. Carbon dioxide

Q6. When magnesium reacts with hydrochloric acid, which gas is produced?

A. Oxygen

B. Hydrogen

C. Carbon dioxide

D. Nitrogen

Q7. What is the pH of a solution with high concentration of H ions?

A. 1

B. 5

C. 7

D. 9

Q8. Which of these is an example of a physical change?

A. Burning wood

B. Rusting of iron

C. Melting of ice

D. Digestion of food

Q9. Which organelle is responsible for energy production in cells?


A. Ribosome

B. Nucleus

C. Mitochondrion

D. Chloroplast

Q10. Which blood vessel carries oxygenated blood from the lungs to the heart?

A. Pulmonary artery

B. Pulmonary vein

C. Aorta

D. Vena cava

Q11. In photosynthesis, plants convert:

A. Oxygen into glucose

B. Glucose into carbon dioxide

C. Carbon dioxide and water into glucose and oxygen

D. Glucose and oxygen into water and carbon dioxide

Q12. Which part of the brain controls balance and coordination?

A. Cerebrum

B. Cerebellum

C. Medulla

D. Hypothalamus

Q13. If you place a glass of cold water in a warm room, which process explains how the water

eventually reaches room temperature?

A. Radiation

B. Conduction

C. Insulation

D. Thermal equilibrium

Q14. Which of the following statements explains why astronauts float in the International Space
Station?

A. There is no gravity in space

B. The station is moving slowly

C. They are in a continuous state of free fall

D. Air pressure keeps them afloat

Q15. A scientist tested how light affects plant growth. Which variable is the independent variable?

A. The height of the plant

B. Type of plant

C. Amount of light

D. Soil used

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