Examples of Chemical Changes
Burning a log is an example of a _______________________.
What is a chemical change?
Water changes from a liquid to a solid.
What is freezing?
What is the biggest sign that cracking a glowstick is a chemical change?
What is light?
A ___________ is a type of change where properties of substances are changed, but there are no new substances formed.
What is a physical change?
A compound has more than one type of this in a single molecule.
What is atom/element?
The only chemical change on this list: mixing the sugar and butter, adding the chocolate chips, and baking the cookies.
What is baking the cookies?
Solid, liquid, and gas are _________________.
What are the states of matter?
What is the biggest sign that a chemical reaction happens when you mix an ice pack?
What is change in temperature?
Whenever you mix two or more things together, there is a chemical change. This statement is _________.
What is false/incorrect?
A change in matter that does not have a chemical reaction is called this.
What is a physical change?
All but one of these are physical changes. Water vapor condenses into clouds. Acid released from factories accumulates in the clouds. Rain falls from the clouds. Acid rain interacts with stone. The chemical change is ________________.
What is acid rain interacts with stone?
Water vapor changes into liquid water.
What is condense (condensation)?
What is the biggest sign that mixing baking soda and vinegar is a chemical change?
What are bubbles/release of gas?
The name of the principle that states that the total mass does not change, even during a physical change such as freezing or melting?
What is conservation of mass?
The name of the principle that states the total mass does not change, even during a chemical change
What is conservation of mass?
Paper gets wet. Wet paper is crumpled into a blob. Wet paper dries out in the sun. ___________ of these are examples of chemical changes.
What is zero/none?
Name the physical change on this list: water is mixed with salt, baking soda is mixed with vinegar, and acid mixed with metal
What is water mixed with salt?
What is the biggest sign that rusting metal is a chemical change?
What is change in physical properties? i.e. strength change, hardness change, color change
During a physical change, _________ is the number of new molecules formed.
What is zero?
In a chemical change different kinds of particles (elements) rearrange and there is a new ___________ after the reaction.
What is substance/molecule?
Mrs. Webb finds the mass of a log before burning and after burning it. She discovers that the mass of the charcoal and ash is much lighter than before burning the wood. This is what happened to the difference in mass.
What is released as a gas?
What is physical change?
What are the two major signs of a chemical change when burning natural gas? (Think gas stove)
What is light and heat?
Water turning into ice is not an example of a chemical change because the molecules _____________.
What is stay the same/don't change?