1) What is the primary source of natural light on Earth? a) Moonlight b) Fire c) Sunlight d) Starlight 2) What material allows some light to pass through but scatters it in different directions? a) Metal b) Glass c) Wood d) Plastic 3) What happens when light passes through a prism? a) It becomes warmer b) It splits into different colors c) It disappears d) It turns into sound 4) In a camera, what part allows light to enter and form an image? a) Lens b) Shutter c) Flash d) Film 5) What do you call the bending of light as it passes through different materials? a) Reflection b) Refraction c) Absorption d) Transmission 6) Rainbows appear as a band of colors in an arc. A rainbow forms when the sun shines on the water droplets in the atmosphere. This process is called __________. a) dispersion b) fusion c) bending d) radiation 7) When you look at an object in a swimming pool it seems that that object on the pool is closer to you. What property of light is exhibit by that observation? a) Dispersion of light b) Reflection of light c) Diffraction of light d) Refraction of light 8) The reason we can see the things around us during the day is the light. Main source of light from the sun is called _________. a) Starlight b) Light waves c) Radiant light d) Artificial light 9) Which of the following statement is TRUE? I. Sun rays travel in a straight line II. Blocking the sun will form a shadow in the opposite direction III. Sunlight can travel in a straight and diagonal line. a) I and II only b) I, II, and III c) I and III only d) II and III only 10) What do we call light that comes from living organisms, like fireflies? a) Natural light b) Bioluminescent light c) Artificial light d) Reflective light 11) Which of the following statements is true about light? a) Light can only travel in a straight line. b) Light cannot pass through any materials. c) Light can be reflected, refracted, and absorbed. d) Light is not important for seeing things. 12) What happens when light hits a mirror? a) It disappears. b) It absorbs the light. c) It reflects the light. d) It changes color. 13) Which of the following is an example of a conductor of heat? a) Wood b) Rubber c) Metal d) Plastic 14) Which device is used to convert sunlight into electricity? a) Solar panel b) Wind turbine c) Water wheel d) Battery 15) What is the purpose of a circuit in an electrical system? a) To generate heat b) To control the flow of electricity c) To produce light d) To store energy 16) Which material is a good insulator of heat? a) Metal b) Glass c) Plastic d) Copper 17) What is the unit of measurement for electrical energy consumption? a) Kilogram b) Kilowatt-hour c) Liter d) Meter 18) The water boils suddenly causing you to panic and immediately hold the cover of the pot when you feel that it is extremely hot. The transfer of heat from the pot to its cover is called __________. a) Conduction b) Convection c) Radiation d) Microwave 19) Which of the following is an example of a device that uses both heat and electricity to work? a) Microwave oven b) Toaster c) Electric fan d) Refrigerator 20) What is the unit of measurement for electrical resistance? a) Watt b) Volt c) Ohm d) Ampere 21) What device is used to complete a circuit and allow electricity to flow? a) Switch b) Bulb c) Battery d) Wire 22) Which of the following is a form of heat transfer through direct contact? a) Conduction b) Convection c) Radiation d) Insulation 23) Which of these is a renewable source of energy used to generate electricity? a) Coal b) Solar power c) Oil d) Natural gas 24) Which of these is a device that converts electrical energy into light? a) Heater b) Bulb c) Fan d) Microwave 25) What happens when you rub two objects together, creating friction? a) They become colder  b) They produce heat  c) They become lighter  d) They stop moving 26) What device is used to measure temperature? a) Barometer b) Thermometer c) Hydrometer d) Compass 27) You blow up a balloon and notice it gets bigger. What type of matter is filling the balloon, and what happens to its volume? a) Solid; it decreases b) Gas; it increases c) Liquid; it stays the same d) Plasma; it disappears 28) You mix sugar into a glass of water, and it disappears. What happens to the sugar in the water? a) It becomes a solid b) It dissolves c) It evaporates d) It freezes 29) What is the term for the process of water collecting on the surface instead of soaking? a) Evaporation b) Condensation c) Runoff d) Precipitation 30) What is the process called when water changes from a liquid to a solid? a) Evaporating b) Freezing c) Condensing d) Melting

Reviewer #13 (WW #12) - G3 Science DFOK 2025

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