Science Quiz Questions Answers (Part 1 of 5) - Science Quiz For Kids

Science Quiz (Part 1) - This Science Quiz is a fun online test of your science knowledge. Here are 51 general science quiz questions with answers. You can test your general science knowledge with this multiple choice science quiz.

1. Question: Some lasers are referred to as being “cw.” What does “cw” mean?

1) Circular wave
2) Constant white
3) Continuous wave
4) Clear white

2. Question: What is the process responsible for producing photons in a diode laser?

1) Fermi level shift
2) Majority carrier injection
3) Carrier freeze out
4) Electron-hole recombination

3. Question: What are three types of lasers?

1) Gas, metal vapor, rock
2) Pointer, diode, CD
3) Diode, inverted, pointer
4) Gas, solid state, diode

4. Question: What was the active medium used in the first working laser ever constructed?

1) A diamond block
2) Helium-neon gas
3) A ruby rod
4) Carbon dioxide gas

5. Question: After the first photons of light are produced, which process is responsible for amplification of the light?

1) Blackbody radiation
2) Stimulated emission
3) Planck’s radiation
4) Einstein oscillation

6. Question: Once the active medium is excited, the first photons of light are produced by which physical process?

1) Blackbody radiation
2) Spontaneous emission
3) Synchrotron radiation
4) Planck’s oscillation

7. Question: The first step to getting output from a laser is to excite an active medium. What is this process called?

1) Pumping
2) Exciting
3) Priming
4) Raising

8. Question: Breaking of a larger hydrocarbon molecule into a smaller one by heating in the presence of a catalyst is called ___.

1) Cracking
2) Orthofugation
3) Centrifugation
4) Thermogenation

9. Question: A primary fuel is that which is used in the same form as it occurs in nature. Which of the following is not a primary fuel?

1) Kerosene
2) Wood
3) Coal
4) Natural Gas

10. Question: Where was the first oil well struck in the world?

1) Kuwait
2) USA
3) Saudi Arabia
4) Australia

11. Question: What is the process used to separate the different components of oil?

1) Deadly Distillation
2) Simple Distillation
3) Fractional Distillation
4) Destructive Distillation

12. Question: What is the main constituent of coal gas?

1) Oxygen
2) Water
3) Nitrogen
4) Methane

13. Question: Which variety of coal contains the highest percentage of carbon?

1) Anthracite
2) Peat
3) Bituminous
4) Lignite

14. Question: Coal is formed due to the process of...?

1) Evaporation
2) Centrifugation
3) Conjugation
4) Carbonization

15. Question: Which of these has the highest calorific value?

1) Rubber
2) Wood
3) Coal
4) Hydrogen

16. Question: What is the main component of biogas and natural gas?

1) Ethane
2) Methane
3) Propane
4) Butane

17. Question: Heating fuels in the absence of air is called 'Destructive Distillation', as it 'destroys' it to form simpler substances. What do we get when we do the same to wood?

1) Tar
2) Acetic Acid
3) Charcoal
4) All of these

18. Question: If you wanted to lighten your hair at home, what is the active ingredient in the dye preparation that will lighten your hair?

1) Hydrogen peroxide
2) Acetic acid
3) Sodium hydroxide
4) Phenol

19. Question: "Antifreeze" is used in car radiators to stop the liquid that cools the engine from, well, freezing when it gets cold outside. Water is one component of antifreeze; what is the other main component?

1) Ethylene glycol
2) Acetone
3) Sodium chloride
4) Benzene

20. Question: Aspirin can be found in many household medicine cabinets. But what is it chemically?

1) Paracetamol
2) Acetylsalicylic acid
3) Acetaminophen
4) Ibuprofen

21. Question: What is the major component of this adhesive: woodworking glue also known as PVA glue?

1) Natural rubber
2) Polyamide
3) Cellulose
4) Poly (vinyl alcohol)

22. Question: What is dry ice?

1) Liquid nitrogen
2) Water ice
3) Solid carbon dioxide
4) Frozen ethanol

23. Question: Nail polish remover is something that us girls just can't do without. But what exactly is it in nail polish remover that does the polish removing?

1) Methanol
2) Ethanol
3) Acetone
4) Limonene

24. Question: Bleach is another useful household chemical. It is often referred to as "chlorine bleach". What is the main component of household bleach?

1) Sodium chloride
2) Sodium hypochlorite
3) Hydrochloric acid
4) Sodium hydroxide

25. Question: Most people have used superglue at one stage or another, but what is its major chemical component?

1) Styrene
2) Acetone
3) Specially-treated honey
4) Alpha-cyano acrylate

26. Question: Methylated spirits is a very common household chemical - but what is its main component?

1) Acetone
2) Turpentine
3) Ethanol (alcohol)
4) Water

27. Question: There are currently how many periods on the periodic table?

1) 6
2) 7
3) 8
4) 9

28. Question: Which element has close to 10,000,000 known compounds?

1) Oxygen
2) Carbon
3) Hydrogen
4) Sodium

29. Question: What element is name after Copenhagen, Denmark?

1) Arsenic
2) Cobalt
3) Hafnium
4) Copper

30. Question: What element's three isotopes have different names?

1) Helium
2) Oxygen
3) Carbon
4) Hydrogen

31. Question: What was the first element to be produced artificially

1) Plutonium
2) Neptunium
3) Francium
4) Technetium

32. Question: What is the lightest element with an atomic symbol not related to its English name?

1) Potassium (K)
2) Sodium (Na)
3) Iron (Fe)
4) Tungsten (W)

33. Question: What is the lightest element of the ones below with an atomic symbol that is also a US state postal code?

1) Argon (AR)
2) Aluminum (AL)
3) Scandium (SC)
4) Calcium (CA)

34. Question: What is the heaviest of the naturally occuring Noble gases?

1) Radon
2) Xenon
3) Helium
4) Argon

35. Question: Which chemical compound occurs naturally in tea and coffee and is a popular additive to soft drinks?

1) Cellulose
2) Nicotine
3) Maltose
4) Caffeine

36. Question: How many moons does Pluto have (found by year 2000)?

1) 32
2) 16
3) 4
4) 1

37. Question: Which planet orbits the sun at a speed of 110,000 kph?

1) Earth
2) Venus
3) Jupiter
4) Mars

38. Question: Which planet is 110 million km from the sun?

1) Earth
2) Mercury
3) Mars
4) Venus

39. Question: Which planet takes 248.5 earth years to go round the sun?

1) Neptune
2) Pluto
3) Uranus
4) Saturn

40. Question: A meteorite struck Antarctica in 2004. It was 30 feet wide. How far away was the climate affected by this strike?

1) Only a small section of Antarctica
2) South Africa and Argentina
3) The North Polar region
4) Other side of the planet

41. Question: Most meteorites are found in Antarctica and where else?

1) Brazil
2) New Zealand
3) North Africa
4) Hawaii

42. Question: In what country must you turn over any meteor finds?

1) Scotland
2) Egypt
3) South Africa
4) Russia

43. Question: In the 1990s, a spacecraft was designed to protect Earth from meteors, asteroids and comets. What was its name?

1) Buster I
2) Maybelle I
3) Defender II
4) Clementine II

44. Question: It has been estimated that a meteorite does what once every 180 years?

1) Hits a human
2) Leaves a crater
3) Strikes the moon
4) Splits in half

45. Question: The International Space Station has protection from meteors. What is it made of?

1) Rubber
2) Kevlar
3) Plastic
4) Steel

46. Question: The most famous meteor shower is the Perseids. What is its other name?

1) Saint Elmo's Fire
2) Tears of Saint Lawrence
3) Northern Lights
4) Southern Lights

47. Question: A piece of stone and/or iron traveling through space that moves through the earth¹s atmosphere is...?

1) Planet
2) Sun
3) Moon
4) Meteor

48. Question: At room temperature, which element conducts electricity better than any other element?

1) Pb
2) Au
3) Ag
4) Cu

49. Question: The candela is one of the seven base units in the SI system. It measures...?

1) Magnetism
2) Luminous intensity
3) Combustion rate
4) Luminance

50. Question: Which of the "rare" gases is the most common in the atmosphere?

1) Radon
2) Neon
3) Xenon
4) Argon

51. Question: What scientist discovered the radioactive element radium?

1) Isaac Newton
2) Albert Einstein
3) Benjamin Franklin
4) Marie Curie

Science Quiz Answers

1. Continuous wave
2. Electron-hole recombination
3. Gas, solid state, diode
4. A ruby rod
5. Stimulated emission
6. Spontaneous emission
7. Pumping
8. Cracking
9. Kerosene
10. USA
11. Fractional Distillation
12. Methane
13. Anthracite
14. Carbonization
15. Hydrogen
16. Hydrogen
17. All of these
18. Hydrogen peroxide
19. Ethylene glycol
20. Acetylsalicylic acid
21. Poly (vinyl alcohol)
22. Solid carbon dioxide
23. Acetone
24. Sodium hypochlorite
25. Alpha-cyano acrylate
26. Ethanol (alcohol)
27. 7
28. Hydrogen
29. Hafnium
30. Hydrogen
31. Technetium
32. Sodium (Na)
33. Aluminum (AL)
34. Radon
35. Caffeine
36. 1
37. Earth
38. Venus
39. Pluto
40. Other side of the planet
41. North Africa
42. South Africa
43. Clementine II
44. Hits a human
45. Kevlar
46. Tears of Saint Lawrence
47. Meteor
48. Ag
49. Luminous intensity
50. Xenon
51. Marie Curie