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Total questions: 54271
How do electromagnets work?Popularity: 308
What is the difference in weight between a gallon of water and a gallon of gasoline?
Popularity: 268
Why is the sky blue?
Popularity: 228
What makes stain removers work?
Popularity: 220
What effect does music have on heartrate?
Popularity: 217
What is the difference between a test tube baby and cloning?
Popularity: 217
What safety rules should be followed in a science laboratory?
Popularity: 212
Why does bottled water have an expiration date?
Popularity: 206
Why are the rear tires of a tractor bigger than the front tires?
Popularity: 199
What would happen if there was no electricity?
Popularity: 193
What is the best microscope to buy for home or personal use?
Popularity: 193
Do the sun's tanning rays penetrate water and to what degree?
Popularity: 190
What causes the popping or tinkling sounds you hear as hot metal pipes cool off and contract?
Popularity: 189
What keeps airplanes up?
Popularity: 182
What is the first and last step in the scientific method?
Popularity: 179
How is a wooden ship inside a glass bottle made?
Popularity: 178
How many gallons are in a cubic gallon?
Popularity: 176
Which two mountain ranges are responsible for taking most of the moisture along the west coast of the US?
Popularity: 176
Are there any ways to pass through a laser sensor undetected?
Popularity: 175
If you buy a microscope for the home what level of detail would one be able to see?
Popularity: 175
How does Nikola Tesla's anti-gravity machine work?
Popularity: 171
What are the uses of roselite?
Popularity: 164
What are clouds made of?
Popularity: 158
Where can you get a diagram for a metric stick?
Popularity: 155
If you fly in a plane from New York to India is the distance flown less than flying from India to New York based on the rotation of the earth?
Popularity: 153
Who is the greatest scientist in the world?
Popularity: 145
Why are the oceans salty?
Popularity: 144
What is the average teenage IQ?
Popularity: 143
How can you make your own car wax polish?
Popularity: 143
What are test tube babies?
Popularity: 139
What is total charge?
Popularity: 137
What experiments did Gregor Mendel conduct and what did he find out?
Popularity: 136
How do you create a carbon atom cycle story?
Popularity: 136
If lightning hits a body of water will there be a splash?
Popularity: 135
Is test tube cloning accepted by our society?
Popularity: 135
What is the family background of Gregor Mendel?
Popularity: 131
How many pounds does one gallon of water weigh?
Popularity: 130
How do you get rid of all bubbles in clean water?
Popularity: 129
Can you see static electricity?
Popularity: 127
Why does the Watershed need to be enforced?
Popularity: 127
If one gallon of water weights 8.34 lbs would adding a 2 lb fish to the water change the weight of the water?
Popularity: 125
What are the general principles of agroforestry?
Popularity: 125
How does light travel through a camera?
Popularity: 125
How do different types of music such as heavy metal rap or country affect a person's behavior?
Popularity: 124
Why will a string vest with a shirt over it keep you as warm as a jumper?
Popularity: 124
What is the effect of sodium hydroxide on the action of pepsinogen?
Popularity: 121
Where do they make fuel cells?
Popularity: 121
How much does a gallon of ice weigh?
Popularity: 120
What are 'primary' inequalities?
Popularity: 118
Why do men have nipples?
Popularity: 116
How can you tell if a young heifer is pregnant?
Popularity: 116
How could you calculate the evaporation rate in a farm based on the humidity and temperature?
Popularity: 115
What is the mathmatical formula for calculating volume?
Popularity: 114
Why is skin designated an organ?
Popularity: 114
What is the shortest muscle in the human body?
Popularity: 113
What is a gene?
Popularity: 112
How come when you stand on your head it starts to throb but when you stand on your feet they don't?
Popularity: 112
Why do objects appear the color they are?
Popularity: 112
Are fuel cells dangerous to make or dipose of?
Popularity: 111
What is the scientific attitude and what attitudes and characteristics define a good scientist?
Popularity: 108
Why do cows face the same direction?
Popularity: 107
What are advantages and disadvantages of static electricity?
Popularity: 104
Are cosmic strings subatomic particles or the remnants from the big bang?
Popularity: 102
What is the connection between organisms in a stream and the dissolved oxygen level?
Popularity: 97
Can one twin absorb the other?
Popularity: 94
How many gallons in a barrel of oil?
Popularity: 90
Why do stains stain?
Popularity: 88
Why do veins become more prominent as one ages?
Popularity: 85
Where can you find nitric acid?
Popularity: 82
What is measured in hoppersfeet?
Popularity: 78
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