Reaction Basics
Combining substances to make new substances is called a ____.
chemical reaction
Bubbles forming in a reaction show the production of ____.
gas
In a chemical equation, the arrow can be read as this word.
produce
This scientist with four metal arms is one of Spidey’s most famous enemies.
Doctor Octopus
When shiny metal becomes dull or discolored from reacting with air over time.
tarnished
The starting substances in a chemical reaction.
reactants
Burning wood or fireworks show this kind of energy as a sign of reaction.
light
In the equation O₂ + 2H₂ → 2H₂O, what are the reactants?
Hydrogen and Oxygen
This black, gooey alien symbiote bonds with Eddie Brock.
Venom
Making a liquid weaker by adding more of another liquid.
diluting
The new substances made in a chemical reaction.
products
Adding food coloring to water is this kind of change, not a chemical reaction.
physical change
In the equation O₂ + 2H₂ → 2H₂O , water is the _______.
product
This villain can turn his body into tiny particles of rock.
Sandman
The characteristics that describe what something is like, such as color or hardness.
properties
Scientists confirm a reaction by finding a new substance with different ____.
properties
A solid that forms and settles out of a liquid mixture.
precipitate
Smoke, bright flashes, and heat from fireworks are all evidence of ____.
chemical reactions
This bird-themed villain uses a winged suit to fly and steal.
Vulture
What something is made of; the parts or materials that make it up.
composition