How can just 120 or so elements make up millions of materials and substances found on Earth?
How can just 120 or so elements make up millions of materials and substances found on Earth?
They can because atoms combine.
What is made when two or more different elements join or combine?
What is made when two or more different elements join or combine?
It is a compound.
What is: changes color, energy is released or absorbed, changes odor, produces gases or solids, is a change that is not easy to undo?
What is: changes color, energy is released or absorbed, changes odor, produces gases or solids, is a change that is not easy to undo?
These are the 5 main signs of a chemical change.
What happens if a liquid solution cannot hold any more solid?
What happens if a liquid solution cannot hold any more solid?
It is saturated
Name the 4 parts of an atom.
Name the 4 parts of an atom.
electron, neutron, proton, nucleus
What is it called when atoms share electrons?
What is it called when atoms share electrons?
It is a bond
What are numbers and letters that describe how many atoms of each element are included in one molecule or compound?
What are numbers and letters that describe how many atoms of each element are included in one molecule or compound?
This is a formula
What are changes that happen when elements or compounds simply mix together without forming new compounds that have new and different properties?
What are changes that happen when elements or compounds simply mix together without forming new compounds that have new and different properties?
This is a mixture
What type of liquid is it when pieces of solid material are so tiny and light that they do not immediately settle down?
What type of liquid is it when pieces of solid material are so tiny and light that they do not immediately settle down?
It is a suspension.
What are the two types of changes in a substance?
What are the two types of changes in a substance?
chemical change and physical change
What happens when atoms form or break a bond?
What happens when atoms form or break a bond?
They produce a chemical reaction
What is it when substances combine without bonding and do not form a totally new substance?
What is it when substances combine without bonding and do not form a totally new substance?
This is a physical change.
Wht is a mixture in which the atoms of a solid separate and become invisible in a liquid?
Wht is a mixture in which the atoms of a solid separate and become invisible in a liquid?
This is a solution
Why is a suspension a physical change?
Why is a suspension a physical change?
It is a physical change because the solids do not change chemically.
Name the States of Matter
Name the States of Matter
Solids, Liquids, Gases
What is the smallest part of a substance that can exist by itself, made of two or more atoms?
What is the smallest part of a substance that can exist by itself, made of two or more atoms?
It is molecule
What happens when a new substance forms from the mixing of two or more different substances?
What happens when a new substance forms from the mixing of two or more different substances?
It is a chemical change
What happens when you keep adding more and more of a substance to a solution?
What happens when you keep adding more and more of a substance to a solution?
It is becomes more concentrated
Name the three ways substances can combine
Name the three ways substances can combine
Mixture, solution, suspension
What is everything in the universe that takes up space and has weight made of?
What is everything in the universe that takes up space and has weight made of?
Matter
Do molecules have to be a combination of just one element?
Do molecules have to be a combination of just one element?
No, molecules can be a combination of the same or different elements.
Is a new substance formed in a physical change?
Is a new substance formed in a physical change?
No
Is there a limit to the amount of solid you can add to a liquid when making a solution?
Is there a limit to the amount of solid you can add to a liquid when making a solution?
Yes, there is a limit
What is substance made of 2 atoms of hydrogen and one atom of oxygen?
What is substance made of 2 atoms of hydrogen and one atom of oxygen?
A water molecule
Which class is going to study and do a fabulous job on their test?
Which class is going to study and do a fabulous job on their test?
This class!
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