chemical reactions
What is chemical reactions ?
A chemical reaction is when substances mix and transform into different substances.
what does sound travel through?
Sounds can travel through water, solids, air or anything that has particles for the sound vibrations to bounce off
What is the main source of natural light on Earth?
the sun
What is the state of being free from illness or injury called?
health
What is the name of the organized chart of all known elements?
The Periodic Table.
Give one everyday example of a chemical reaction.
cooking an egg
What do we call the highness or lowness of a sound?
pitch
What do we call a straight path that light travels in?
a ray
What is the state of being free from illness or injury called?
go to the gym , exercise and eat healthy
What is the smallest particle of an element that still has the properties of that element?
an atom
In a chemical reaction, are new atoms created or destroyed?
No, they just get rearranged.
Through what state of matter does sound travel fastest: solid, liquid, or gas?
solid
What happens when light bounces off a surface?
reflection
What are the main types of nutrients our bodies need from food?
Carbohydrates, proteins , fats , vitamins and minerals
What is the chemical symbol for the element oxygen?
0
What are the new substances formed in a chemical reaction called?
They are called products.
Our ears help us to do what with sounds?
hear them
What type of surface reflects light in a regular way, like a mirror?
a smooth surface
What is the process of breaking down food in our bodies to release energy and nutrients called?
Digestion.
What is the chemical symbol for the element hydrogen?
H
Name two signs that might indicate a chemical reaction has occurred.
A new color appears, or bubbles form.
What is something that can block or reduce the amount of sound that passes through it?
A sound insulator
What are the three primary colors of light?
Red, green, and blue.
What activity helps to keep our heart and lungs healthy?
Exercise (or physical activity).
What is the first element in the Periodic Table?
Hydrogen