In this chemical experiment, we will observe the reaction using ammonium phosphate.

This chemical reaction is very dangerous.

I will work using this laptop.

He was observing the behavior of the birds.

He was observing the behavior of birds.

Phosphorus was emitting a mysterious light in the forest.

This fertilizer is rich in phosphorus.

We conducted a new experiment in science class.

He is majoring in chemistry at university.

This chemical reacts when heat is added.