Science Encompasses Test

1. Which of the following is an abiotic component of an ecosystem?

A) Producer B) Decomposer C) Sunlight D) Consumer

2. What type of chemical bond involves the sharing of electrons between atoms?

A) Ionic bond B) Covalent bond C) Metallic bond D) Hydrogen bond

3. Convert 500 milliliters to liters.

A) 0.005 L B) 0.05 L C) 0.5 L D) 5 L

4. If a force of 10 N is applied to an object over a distance of 5 m, what is the work done?

A) 2 J B) 0.5 J C) 50 J D) 15 J

5. Which of the following units is used to measure force?

A) Pascal B) Joule C) Newton D) Watt

6. What is the formula for calculating pressure?

A) Force × Area B) Force / Area C) Mass × Acceleration D) Work / Time

7. A mixture where the components are uniformly distributed and indistinguishable is called a:

A) Heterogeneous mixture B) Homogeneous mixture C) Suspension D) Colloid

8. Which of the following is a biotic factor?

A) Temperature B) Water C) Bacteria D) Soil pH

9. What is the standard international unit for length?

A) Centimeter B) Inch C) Meter D) Kilometer

10. What happens to the pressure of a gas if its volume decreases, assuming constant temperature?

A) Increases B) Decreases C) Remains the same D) Becomes zero

11. The transfer of energy through an ecosystem primarily begins with:

A) Consumers B) Decomposers C) Producers D) Carnivores

12. An atom that gains or loses electrons becomes a(n):

A) Molecule B) Isotope C) Ion D) Compound

13. What is the unit for work done?

A) Watt B) Newton C) Joule D) Pascal

14. A push or a pull acting on an object is defined as:

A) Work B) Energy C) Force D) Pressure

15. Which of these is a pure substance?

A) Air B) Saltwater C) Gold D) Milk

16. The relationship between different organisms in an ecosystem that interact with each other for food is called a:

A) Biome B) Food web C) Habitat D) Niche

17. What type of bond is formed when electrons are transferred from one atom to another?

A) Covalent bond B) Ionic bond C) Metallic bond D) Hydrogen bond

18. How many millimeters are in 1 meter?

A) 10 B) 100 C) 1,000 D) 10,000

19. A machine that reduces the force needed to perform work is called a:

A) Complex machine B) Simple machine C) Motor D) Generator

20. What is the relationship between force, mass, and acceleration?

A) Force = Mass / Acceleration B) Force = Acceleration / Mass C) Force = Mass × Acceleration D) Mass = Force × Acceleration

21. The amount of force applied over a given area is known as:

A) Work B) Power C) Pressure D) Energy

22. A substance formed when two or more elements are chemically combined in a fixed ratio is called a:

A) Mixture B) Element C) Compound D) Solution

23. The total living and non-living components in a particular area make up a(n):

A) Population B) Community C) Ecosystem D) Biome

24. Which of the following elements typically forms covalent bonds?

A) Sodium B) Chlorine C) Carbon D) Potassium

25. What instrument is used to measure temperature?

A) Barometer B) Anemometer C) Thermometer D) Hydrometer

26. What is the power if 100 J of work is done in 10 seconds?

A) 1 J B) 10 W C) 1000 W D) 100 W

27. The force of attraction between objects with mass is called:

A) Magnetic force B) Electrical force C) Gravitational force D) Frictional force

28. Why does a sharp knife cut better than a blunt knife?

A) It applies more force. B) It has a larger surface area. C) It exerts more pressure due to a smaller area. D) It has less mass.

29. What is a key characteristic of a solution?

A) Components are easily separable by filtration. B) It is always opaque. C) It is a homogeneous mixture. D) Particles settle over time.

30. Decomposers play a crucial role in an ecosystem by:

A) Producing their own food. B) Consuming other organisms. C) Recycling nutrients back into the ecosystem. D) Regulating temperature.

31. The strongest type of chemical bond is generally considered to be:

A) Hydrogen bond B) Van der Waals forces C) Covalent bond D) Ionic bond

32. To measure the volume of an irregularly shaped object, you can use the:

A) Measuring tape B) Measuring cylinder (displacement method) C) Balance scale D) Stopwatch

33. Which of the following scenarios involves negative work being done?

A) Pushing a box across the floor. B) Lifting a weight upwards. C) Lowering a weight slowly. D) Holding a heavy object stationary.

34. What is the net force on an object in equilibrium?

A) Maximum B) Minimum C) Zero D) Varies

35. The pressure exerted by a fluid increases with:

A) Decreasing depth B) Increasing depth C) Decreasing density D) Decreasing temperature

36. Which of these is a method for separating immiscible liquids?

A) Evaporation B) Filtration C) Decantation D) Distillation

37. What is the primary source of energy for most ecosystems on Earth?

A) Geothermal energy B) Chemical energy C) Solar energy D) Wind energy

38. In a chemical reaction, atoms are:

A) Created or destroyed B) Transformed into different elements C) Rearranged D) Always lose electrons

39. What is the correct way to read the volume of a liquid in a measuring cylinder?

A) Read from the top of the meniscus. B) Read from the bottom of the meniscus. C) Read from the highest point of the liquid. D) Read from the side of the cylinder.

40. The rate at which work is done is defined as:

A) Energy B) Force C) Power D) Momentum

41. According to Newton's Third Law, for every action, there is an equal and opposite:

A) Force B) Momentum C) Acceleration D) Velocity

42. Atmospheric pressure is measured using a:

A) Manometer B) Barometer C) Altimeter D) Hydrometer

43. Which of the following is a physical method for separating a mixture?

A) Combustion B) Electrolysis C) Chromatography D) Rusting

44. A group of organisms of the same species living in the same area is called a:

A) Community B) Ecosystem C) Population D) Niche

45. How many valence electrons does a noble gas typically have (excluding Helium)?

A) 2 B) 4 C) 6 D) 8

46. The scientific method often begins with:

A) Forming a conclusion B) Conducting an experiment C) Making an observation D) Developing a theory

47. When an object is moving at a constant velocity, the net force acting on it is:

A) Increasing B) Decreasing C) Zero D) Non-zero and constant

48. Which of the following best describes the principle of conservation of energy?

A) Energy can be created and destroyed. B) Energy is always lost as heat. C) Energy can be transferred or transformed, but not created or destroyed. D) Energy is only conserved in mechanical systems.

Download your copy here 50 SCIENCE QUESTIONS AND ANSWERS

49. A colloid is a type of mixture where:

A) Particles are very large and settle quickly. B) Particles are completely dissolved. C) Particles are dispersed but do not settle, often exhibiting the Tyndall effect. D) Components are chemically bonded.

50. Biodiversity refers to the:

A) Number of different ecosystems in a region. B) Variety of life on Earth. C) Total amount of biomass in an ecosystem. D) Stability of an ecosystem.

Let’s talk

50 LIKELY WASSCE OBJECTIVE QUESTIONS, 2025

Science Encompasses Test

Marking Scheme

Join the conversation

Let’s talk

Science Encompasses Test

Marking Scheme

Join the conversation

More from this topic

Recent posts