Can you get an A on this 10th grade science quiz?

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Science is the study of everything in our world! From chemicals to stars, spiders to the sky, science explores some of the biggest questions humans have ever faced! Now it's time for the ultimate test, can you remember your 10th grade science knowledge? Try and get an A now!

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1. Which bone protects the brain?

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  1. Syron
  2. Jaw
  3. Spine
  4. Skull
Bones function as the skeleton of the human body, allowing body parts to move and protect organs from damage.
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2. What percentage of the Earth is covered by water?

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  1. 2%
  2. 100%
  3. 15%
  4. 71%
The vast majority of water on the Earth's surface, over 96 percent, is in fact saline (salt) water in the oceans.
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3. A lunar eclipse is an eclipse of what?

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  1. The Moon
  2. The Sun
  3. The Earth
  4. The Stars
Some lunar eclipses can last up to 3 hours and 45 minutes.
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4. The fear of which animal is known as ‘arachnophobia?’

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  1. Spiders
  2. Nails
  3. Artichokes
  4. Horses
Spiders are arachnids, not insects, and are found on every continent of the world except Antarctica.
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5. Did dinosaurs and humans ever exist at the same time?

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  1. No
  2. Yes
  3. They still exist!
  4. Dinosaurs?
The word 'dinosaur' comes from the Greek language and means 'terrible lizard,' it was first coined by English paleontologist Richard Owen in 1842!
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6. What does the E, in E=mc² stand for?

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  1. Element
  2. Eggs
  3. Energy
  4. Enigma
Albert Einstein's most famous equation says that the energy (E) in a system (an atom, a person, or solar system) is equal to its total mass (m) multiplied by the square of the speed of light (c, which is equal to 186,000 miles per second).
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7. How much of your body is made up of bacteria?

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  1. 5%
  2. 57%
  3. Just the eyes...
  4. 0%
57% of our bodies are made up of bacteria! Humans are complex organisms made up of different types of cells, each with their own structure and function. Scientists have estimated the human body contains around 30 trillion cells!
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8. What causes a rainbow?

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  1. Diffraction of diodes
  2. Connection through cortex
  3. Refraction of light
  4. Dispersion of sound
Rainbows can be seen when there are water droplets in the air and the sun is shining. Sunlight, which contains all colors, is refracted, or bent, off the droplets at different angles, splitting into its different colors of red, orange, yellow, green, blue, indigo and violet.
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9. How many days are in a year?

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  1. 52
  2. 200
  3. 365
  4. 12
A year, 365 days, is the time it takes for the Earth to travel around the Sun. A day, 24 hours, is the time it takes for the Earth to spin around once on its axis.
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10. Why is the sky blue?

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  1. Aliens control the color!
  2. The sun is blue!
  3. The clouds have light bulbs inside
  4. Blue light scatters
The sky is blue because blue light is scattered more than other colors in the spectrum, this is due to its shorter, smaller wavelength.
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11. What are clouds made of?

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  1. Smoke
  2. Water droplets
  3. Marshmallow
  4. Silicon
Clouds are formed when water on the Earth evaporates into the sky in the form of droplets. Once the droplets reach a high enough altitude, the water condenses due to the cooler air.
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12. What is the junction between two neurones called?

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  1. A joint
  2. A timmex
  3. A synapse
  4. Glue
At the synapse, one neuron sends a signal to another neuron. There are two types of synapse: electrical and chemical!
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13. What is the boiling point of water?

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  1. 109°F
  2. 525°F
  3. 50°F
  4. 212°F
Miraculously, there is the same amount of water on the Earth's surface as there was when the Earth was formed!
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14. Oil, natural gas and coal are examples of what?

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  1. Skeleton fuels
  2. Crystal fuels
  3. Renewable fuels
  4. Fossil fuels
Fossil fuels are essentially the remains of plants and animals, that perished millions of years ago. The force of the Earth's crust transformed them into the fuels we use today.
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15. Precipitation is another word for…

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  1. Vacation
  2. Condensation
  3. Urination
  4. Rain
Rain does not just happen on the Earth, it occurs on other planets in our Solar System. Whilst our rain is comprised of mostly water, precipitation on other planets can include other elements, such as methane and sulfur.
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16. What is a pandemic?

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  1. Distribution of a cure
  2. An alien spread of disease
  3. A worldwide spread of disease
  4. Distribution of commerce
The word pandemic is often confused with the word epidemic. Whilst pandemic refers to a worldwide occurrence, epidemic only refers to a communal or national occurrence.
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17. What is the scientific symbol for helium?

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  1. Fe
  2. He
  3. H
  4. O
There are about 90 elements out of 118, on the periodic table that occur in nature. The rest are man-made.
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18. How far is the moon from the Earth?

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  1. 238,900 mi
  2. 2 mi
  3. What's the moon?
  4. 621,371,386,3928 mi
The Moon is the Earth's only natural satellite and was formed about 4.6 billion years ago, around 30 millions years after the formation of the solar system!
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19. What is the biggest planet in our solar system?

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  1. Jupiter
  2. Earth
  3. Hoth
  4. Bespin
The planet Jupiter is the fifth planet from the Sun and is two and a half times bigger than all the other planets combined.
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20. What does DNA stand for?

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  1. Deoxyribonucleic acid
  2. Doughnut academy
  3. Do not ask!
  4. Danny blood amino
If you were to pull out all the DNA inside of an average human body, it could stretch from the earth to the sun and back again 600 times.
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21. How many bones do sharks have in their bodies?

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  1. 666
  2. Sharks don't have bones!
  3. 3
  4. Too many!
The skeleton of a shark is made of cartilage, a flexible and light tissue that allows them to stay afloat, save energy, and make tight radius turns.
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22. What type of system circulates blood around the body?

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  1. Circulatory system
  2. Nervous system
  3. Respiratory system
  4. Digestive system
Blood makes up around 7% of the total weight of a human body containing red blood cells, white blood cells, and platelets.
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23. What type of food does an omnivore eat?

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  1. Meat & plants
  2. Otters
  3. White Fish
  4. Shoes
The largest terrestrial omnivore is the endangered kodiak bear which can grow up to 10 feet tall and weigh up to 1,500 lbs!
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24. What is the most common eye color in the world?

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  1. Grey
  2. Brown
  3. Green
  4. Orange
Eye color is determined by the amount of melanin in your iris. Melanin is the same pigment that gives skin its color.
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25. What are the three states of matter?

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  1. Solid, liquid, water
  2. Solid, water, metal
  3. Solid, metal, gas
  4. Solid, liquid, gas
States of matter can change! For example, water, a liquid, can turn to ice which is a solid. Heat water up and it becomes a gas!
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26. Which metal is liquid at room temperature?

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  1. Tin
  2. Iron
  3. Mercury
  4. Titanium
The symbol for Mercury (Hg), comes from the Greek word, hydrargyrum, which means "liquid silver."
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27. What is sodium chloride also known as?

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  1. Lead
  2. Sugar cane
  3. Seawater
  4. Table salt
The word “salary” comes from the Latin word sal, meaning salt, as it was sometimes used to pay Roman soldiers.
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28. Which type of waves are used by cell phones?

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  1. Radio waves
  2. Cardinal waves
  3. Sea waves
  4. Pop waves
Motorola released the first commercial mobile phone in 1983.
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29. Which instrument is used to measure temperature?

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  1. Thermometer
  2. Heat receptor
  3. Thermoglazer
  4. Geiger counter
In 1654, the first enclosed liquid-in-a-glass thermometer was invented by the Grand Duke of Tuscany, Ferdinand II.
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30. What is the sun made of?

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  1. Hydrogen & helium
  2. Carbon & granite
  3. Oxygen & water
  4. Calcium & sulfur
Driving at 60mph, it would take 1,550,000 hours or (ignoring leap years) 176 years, 343 days, and 8 hours to reach the sun.
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31. How many bones does the human body have?

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  1. 25
  2. 50
  3. 100
  4. 206
Your mandible, or jawbone, is the largest, strongest bone in your face.
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32. What protects the earth from UV radiation?

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  1. The Project layer
  2. The Atomic layer
  3. The Calzone layer
  4. The Ozone layer
UV light can be used to treat some skin conditions such as vitiligo, eczema, and psoriasis.
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33. What is a light year?

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  1. A unit of temperature
  2. A unit of salsa
  3. A unit of distance
  4. A unit of force
A light-year is the distance light travels over the course of one year, and is equal to roughly 5.9 trillion miles (9.5 trillion kilometers).
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34. Which of the following is not an example of physical matter?

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  1. An apple
  2. A smile
  3. A shoe
  4. A horse
The definition of physical matter (which is distinct from mental and spiritual phenomena), is that of a solid, liquid or gas that occupies a measurable space!
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35. What do bees make honey from?

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  1. Cheese
  2. Poison
  3. Sugar
  4. Nectar
Honey Bees fly at 25km per hour and beat their wings 200 times per second!
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36. What is the closest star to Earth?

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  1. The Sun
  2. Death
  3. Betelgeuse
  4. Neptune
The star Betelgeuse in the constellation Orion is about 20 times the mass of the Sun, and it’s 1,000 times larger!
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37. What is the chemical formula of water?

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  1. BO1
  2. H2O
  3. C02
  4. WA2
Water can dissolve more substances than any other liquid, including sulfuric acid.
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38. What do you call a scientist that studies the stars?

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  1. A physicist
  2. An astronomer
  3. A starologist
  4. An engineer
The middle finger of famous astronomer Galileo is exhibited at the Museo Galileo in Florence, Italy.
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39. Which of the following travels the fastest?

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  1. Light
  2. The Space Shuttle
  3. A cheetah
  4. A Ferrari F430
Light takes 1.255 seconds to get from the Earth to the Moon.
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40. What does the Scoville Heat Unit Scale measure?

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  1. The space inside a car
  2. Ticket sales
  3. The speed of a car
  4. The heat of chilies
Wilbur Scoville, a pharmacologist, invented the unit in 1912 to measure the pungency of peppers and chilies!
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41. Is a tomato a fruit or vegetable?

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  1. Vegetable
  2. An animal
  3. Neither
  4. Fruit
There are over 10,000 varieties of tomato; these come in a variety of colors, including pink, purple and black!
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42. What is the hardest substance in the human body?

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  1. Hair follicles
  2. Tooth enamel
  3. Toenails
  4. Shins
Enamel erosion is impossible to reverse so look after those teeth!
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43. How much does the average human brain weigh?

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  1. 3 pounds
  2. 9 tonnes
  3. 1/2 pound
  4. 17 pounds
It isn’t until about the age of 25 that the human brain reaches full maturity.
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44. How many hearts does an octopus have?

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  1. 99
  2. 3
  3. One in each tentacle
  4. What's an octopus?
Octopuses usually live for 6-18 months. Males only live a few months after mating.
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45. What blood type do you need to be a universal donor?

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  1. IOU positive
  2. O negative
  3. ABC negative
  4. BBC positive
Higher rates of O negative blood type are found in people from Spain, Iceland, New Zealand, and Australia.
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46. Which bone is the longest in the human body?

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  1. Ulna
  2. Femur
  3. Radius
  4. Pelvis
The femur bone makes up about one-fourth of a person’s overall height.
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47. What is a group of whales called?

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  1. A classroom
  2. A pod
  3. A gangdem
  4. A bloc party
Bowhead Whales can live for more than 200 years!
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48. What animal has the largest ears?

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  1. The elephant
  2. The dog
  3. The rhino
  4. The horse
The word “elephant” comes from the Greek word “elephas” which means “ivory”.
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49. How fast do bee wings beat?

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  1. 20 times per year
  2. 1 times per minute
  3. 180 times per second
  4. 3 times per weekend
A colony of bees consists of 20,000-60,000 honeybees and one queen.
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50. A lion is most closely related to which of the following animals?

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  1. Dog
  2. Leopard
  3. Raccoon
  4. Wolf
Did you know that Leopards make a variety of sounds, including a territorial hoarse, raspy cough, a satisfied purr, and a threatened hiss?
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51. Which nutrient plays a crucial role in muscle-building?

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  1. Iron
  2. Carbohydrate
  3. Fat
  4. Protein
The word ‘protein’ is Greek, and it comes from the word ‘proteios’ which means ‘primary’ or ‘first rank.’ The word protein has been in use since 1883.
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52. What is the name of a frog’s young one?

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  1. Puppy
  2. Tadpole
  3. Infant
  4. Calf
Tadpoles use internal or external gills for breathing. As metamorphose happens, the gills are swapped out for lungs as the tadpoles transition into young frogs.
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53. What natural phenomena are measured by the Richter scale?

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  1. Volcanoes
  2. Earthquakes
  3. Fires
  4. Tornados
The Richter scale was developed in 1935 by American seismologist Charles Richter.
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54. “For every action, there is an equal and opposite reaction.” It is which of Newton’s law of motion?

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  1. Breaking The Law
  2. Second Law
  3. First Law
  4. Third Law
This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself. We sometimes refer to this law loosely as action-reaction.
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55. Medicine that is given to fight bacteria but not viruses?

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  1. Vaccine
  2. Vitamin A
  3. Antibiotic
  4. Uroboros
Since the discovery of penicillin in the 1940s, scientists from many countries have developed more than 150 different antibiotics to help stop the spread of infections.
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56. Yeast is a type of ____.

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  1. Fungus
  2. Plant
  3. Animal
  4. Bacterium
There are about 1,500 different species of yeast. Most reproduce asexually, by budding. Some use binary fission to reproduce asexually. Amazing!
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57. The standard unit of measurement for energy is ____.

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  1. Ampere
  2. Tallicas
  3. Newton
  4. Joule
James Prescott Joule studied the nature of heat and established its connection to mechanical work. He laid the foundation for the theory of conservation of energy, which later inspired the First Law of Thermodynamics.
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58. Earth is surrounded by layers of gases collectively called the?

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  1. Atmosphere
  2. Thunderdome
  3. Ozone layer
  4. Stratosphere
Did you know the sky is actually purple? As light enters the atmosphere, air and water particles absorb and reemit the light, scattering it on its way to our eyes. Since scattering prefers shorter wavelengths, the most commonly scattered color is actually violet.
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59. Which is the strongest sense in a dog?

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  1. Smell
  2. Touch
  3. Taste
  4. Hearing
Dog’s have an exceptional scent-detecting organ that humans don’t have. This is called the vomeronasal organ and it helps canines detect pheromones.
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60. What type of energy eventually depletes?

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  1. Renewable energy
  2. Gravitational energy
  3. Non-renewable energy
  4. Kinetic energy
Most non-renewable energy sources are fossil fuels: coal, petroleum, and natural gas. The period that fossil fuels formed (about 360-300 million years ago) is called the Carboniferous Period.
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