Solid, Liquid or Gas
Physical vs. Chemical Changes
Atoms
Acids and Bases
Science Riddles
100
This state of matter has a definite (fixed) shape and volume.
What is a solid?
100
Example- ripping a piece of paper
What is a physical change?
100
The basic unit of matter (living and nonliving things).
What are atoms?
100
Lemon juice is an example of this.
What is an acid?
100
A group of cows is called a herd. A lion family goes by this word.
What is a pride?
200
This state of matter has a definite volume but takes the shape of its container.
What is a liquid?
200
Example- breaking bread
What is a physical change?
200
Positively charge particle on an atom.
What are protons?
200

A solution with a pH of 7.4.

What is a base?

200

I'm frozen rain, but not just sleet. My name can also mean to greet.

What is hail?

300
This state of matter expands to fill the room and has low density.
What is a gas?
300
Matter can not be created nor destroyed.
What is Law of Conservation of Matter?
300
Negatively charged particle on an atom.
What are electrons?
300
pH is 7
What is neutral?
300

This fluid's name is what's in question. I start the process of digestion.

What is saliva?

400

State of Matter- when two solutions form a precipitate.

What is a solid?

400

When you combine 2 hydrogen and 1 oxygen. 

What is chemical reaction?

400

Particle that has no charge in the nucleus.

What is neutron?

400
Adding an acid to a basic solution
What is neutralization?
400

Wind and water are my companions. I hollow out caves and carve out canyons.

What is erosion?

500

State of Matter- Dish soap is added to show this.

What is gas?

500

Liquid solutions form a gas.

What is chemical reaction?

500
Came up with the current model of the atom that we still use today.
Who is Niels Bohr?
500
A measure of acidity or basicity of of a solution.
What is pH?
500

Oil and coal and gas are a few. This energy source we can't renew.

What are fossil fuels?

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