100+ Science Riddles to Test Your Knowledge and Enjoy the Challenge" page 4 of 7

Chemical formula for carbonic acid

What is the chemical formula for carbonic acid?

The chemical formula for carbonic acid is H2CO3.

What is the name of the process by which a solid changes directly into a gas without becoming a liquid?

The name of the process by which a solid changes directly into a gas without becoming a liquid is sublimation.

You can’t see me, but I can see you. To be more specific, I see through. What am I? –

English riddle ad - 1

It is very hard to create me, but I can’t be destroyed, I can only change form. What am I? –

I’m in your kitchen pantry, waiting for you to wrap me over something. What am I? –

What can you hold for no longer than a few seconds?

English riddle ad - 1

What is the main function of white blood cells in the body?

What is the process by which rocks are broken down into smaller pieces by physical means?

What is the process by which plants make their own food?

English riddle ad - 2

What is the force that attracts objects towards the center of the Earth?

What is the speed of light in a vacuum?

Approximately 299,792 kilometers per second.

What is the name of the force that causes objects to float in liquids or gases?

English riddle ad - 2

What is the process by which an organism changes over time to better survive in its environment?

What is the smallest unit of life?

What is the SI unit for measuring temperature?

English riddle ad - 3