Blue Cards

Question 1

Combustion is the reaction where a substance burns in ___; energy is ___ to the surroundings as heat or light.
Thermal decomposition is A reaction where a single reactant is ______ into simpler products by _____.

Answer 1

Oxygen
Transferred
Broken down
Heating

Question 2

Conservation

Answer 2

In a reaction, the number of atoms stays the same overall.

Question 3

Reactants

Answer 3

Substance that reacts together, show before the arrow in the equation.

Question 4

Products

Answer 4

Substances formed in a chemical reaction, shown after the arrow in the equation.

Question 5

Breaking bonds requires/releases energy.

Answer 5

Requires.

Question 6

Making bonds requires/releases energy.

Answer 6

Releases

Question 7

Describe what happens to the atoms during a physical change.

Answer 7

In a physical change, atoms gain or lose energy and may form/break bonds between them.

Question 8

Describe what happens to the atoms during a chemical change.

Answer 8

Any chemical change atoms are rearranged to make different products. The number of atoms is conserved.

Question 9

Carbon + oxygen =

Answer 9

Carbon dioxide

Question 10

Copper carbonate —>copper oxide + carbon

Answer 10

Dioxide