The Heat is On
Reaction Clues
Matter is Conserved
Chemistry in Action
Atoms & Molecules
100
A reaction that absorbs heat.
What is exothermic?
100
A new substance forms when this happens.
What is a chemical reaction?
100
The complete Law of Conservation of Matter.
What is "matter cannot be created or destroyed; it can only change forms"?
100
The definition of a chemical reaction.
What is "new substances formed that have new properties"?
100
The one or two letter code for elements.
What are chemical symbols?
200
A reaction that feels warm.
What is exothermic?
200
When Alka-Seltzer is dropped into water, bubbles form. This is evidence that ___ was produced.
What is gas?
200
Is this chemical equation balanced or unbalanced?
What is unbalanced?
200
This gas is formed when baking soda reacts with vingear.
What is carbon dioxide?
200
This gas cannot form when sodium reacts with water because its atoms are not present in the reactants.
A. H B. O C. N D. Na
What is C?
300
The tool to determine if a reaction is endothermic or exothermic.
What is a thermometer?
300
The new substances made in a reaction.
What are products?
300
A sealed bag contains 2 g of baking soda, 5 g of vinegar, and a 1 g bag. Find the total mass after the reaction.
What is 8 g?
300
The arrow in a chemical equation is read like this.
What is yield?
300
Draw an example of a reaction that does NOT support the Law of Conservation of Matter.
Drawing.
400
An example of an exothermic reaction.
What are: fire, hand warmers, glow sticks?
400
In 1 minute, list as many clues that a chemical reaction has occurred as you can.
See poster
400
A reaction in an open container produces gas, and the measured mass decreases. Explain why.
Gas atoms have mass, and they float away and escape the open container. The mass decreases.
400
Draw the other product (one more compound)
400
This color circle represents the product formed.
What is orange?
500
A reaction that starts at 20 degrees C, and ends at 12 degrees C.
What is endothermic?
500
A solid formed during a chemical reaction.
What is a precipitate?
500
Which model demonstrates the Law of Conservation of Matter in a chemical reaction?
What is model D?
500
When heat is a reactant, it is this type of chemical reaction.
What is endothermic?