Space Science
Earth Science
Life Science
General
Physical Science
100
How long does it take for light to travel from the sun to the earth?
It takes 8 minutes
100
What is the inner core made of?
Iron and nickel
100
What is the average rate heart beats per minute in an adult?
60 to 100 beats per minute
100
What does PV=nRT stand for?
=pressure
=volume
=amount of substance
=ideal gas constant
=temperature
100
Can gold be created from other elements?
Yes
200
What is the farthest man made object?
Voyager 1
200
What causes climate change?
As greenhouse gas emissions the Earth, they trap heat, therefore climate change.
200
Why does the moon appear in the daytime?
It is reflecting light from the sun — and its closeness to Earth makes it brighter than the daytime or nighttime sky.
200
How much wood would woodchuck chuck if a woodchuck would chuck wood?
700 pounds
200
Can air make shadows?
The refraction of the light doesn't give air shadows.
300
What will happen to the sun in 5,000,000,000 years?
The sun will explode
300
What is the Rock Cycle and how does it work?
The rock cycle is a process that outlines how igneous, metamorphic, and sedimentary break down and form
300
Why is water wet?
When water molecules come into contact with a surface, these forces create the condition of a liquid being wet.
300
Where is the lab in Khan Lab School?
It doesn't have a lab
300
Can light bend through corners?
Light can bend through edges
400
What will humans have to do to the buildings if they live on mars?
Cover them with Martian dirt
400
Why does earth have tectonic plates?
As Earth's mantle heated and cooled over many millennia, the outer crust broke up and commenced the plate motion.
400
Why do we dream?
Dreaming helps you consolidate and analyze memories like skills and habits.
400
We are ___% neanderthals
2
400
Can fire have a shadow
Fire can have shadows
500
Why are conditions necessary for life?
Biogenic elements, a source of energy, liquid water, and a suitable, reasonably stable environment
500
How much does the earth weigh?
5.972 × 10^24 kg
500
What makes us human?
Bipedalism, language, and tool making.
500
What is the theory of relativity?
E = mc2
500
What do you say when someone is running down the street with your gold?
Au