Physics
Which has more mass - a ton of concrete or a ton of feathers?
They both have the same mass (a ton)
[RIDDLE] I can rush, I can be still, I can be hot, I can be cold, I can be hard, I can slip through almost anything. What am I?
Water
Your mom and dad each gave you 23 of these threadlike strands and they helped to make you who you are today.
Chromosomes
I was once an old massive star and soon I will be a brightly colored gas cloud, but for now, I am a massive explosion. What am I called?
Supernova
Why Don't Birds get Electrocuted...when they land on electrical wires?
They sit on only one wire and do not complete the circuit.
What kind of chemical element hates to be a follower and keeps radioactive elements in line?
Lead
Of all the glands, I am known as the master because I boss around the other endocrine glands and tell them what to do. But even though I am a bit bossy, you need me for many things, such as secreting hormones required for sexual development and promoting bone and muscle growth.
Pituitary Gland
I am a hypothetical tunnel, a short cut if you will, of space-time which connects far away regions. I am a what?
Wormhole
[RIDDLE] What period of time has the least weight?
A light year
I come as a gas and I get in line with neon. I am also known as the home of a very super person. What am I?
Krypton
I can be good for you, I can be bad, I can be found all over inside and outside your body. I am microscopic, single-celled and have no nucleus.
Bacteria
I am a black hole’s equivalent of a one-way street. What am I?
Event Horizon
Which type of friction is active when we keep the wheels rolling on the ice without locking up and helping the car stop? Why?
Static friction, as it is greater than rolling and sliding friction.
[RIDDLE] 213 = A HEALING TOUCH
Helium and Aluminium (the numbers 2 and 13 are their respective atomic numbers)
I know you may like to eat sugar, but when you eat too much of it and your blood-sugar levels rise, then my good friend Pancreas releases me into the bloodstream to restore blood sugar levels to their norm.
Insulin
[RIDDLE] What is the loneliest of all astronomical concepts?
Singularity
[RIDDLE] I am of light and I am of energy. Scientists try to create a lot more of me so as to enable total data security. Who am I?
Faster emission rate of photons could enable total data security.
Which element is being referred to in the following haiku?
"The end of the line,your millisecond half-life brings down the curtain."
Oganesson
Without me as a part of your brain, you would lose your posture and balance and be unable to coordinate muscle movements. I always hang out near my good friend the brain stem.
Cerebellum
[RIDDLE] Two Neutron Stars = ? = Black Hole Pairs
Detection of gravitational waves.