Heat
True or False: Atoms and molecules are always moving, even in a frozen block of ice.
What is TRUE?
The ingredients in a chemical reaction are called ________.
What are REACTANTS?
This phase of matter has the most tightly-packed, dense particles.
What is a SOLID?
True or False: All phase changes are chemical changes.
What is FALSE?
The form of heat transfer where a spoon becomes hot when dipped into a hot bowl of soup
What is CONDUCTION?
The end results in a chemical equation are called _______.
What are PRODUCTS?
This phase of matter has a definite volume, but takes the shape of its container.
What is a LIQUID?
Color change over time, such as due to rusting, is a sign of a ____________ change.
What is CHEMICAL?
The form of heat transfer responsible for making the upper level of your home warmer than your basement.
What is CONVECTION?
The only thing you can change to balance a chemical equation are these.
What are COEFFICIENTS?
To turn a solid into a liquid, you must ______ heat energy.
What is ADD?
If new substances and products are formed in a reaction, it is a surefire sign of a ____________ change.
What is CHEMICAL?
The form of heat transfer where the sun's rays warm up the Earth with electromagnetic waves.
What is RADIATION?
The total number of atoms here are:
4H2O
What is 12?
The melting point of substance A is 30oC. What is its freezing point?
What is 30oC?
Hand warmers, which work by thermal energy being released, are an example of an ___thermic reaction.
What is EXOTHERMIC?
This metal, the only one that is liquid at room temperature, is what rises inside thermometers when heat is added.
What is MERCURY?
These are the coefficients to balance this equation:
__P + __O2 --> __P4O10
What are 4, 5, and 1?
Fill in the blank:
During a phase change, this remains constant.
What is TEMPERATURE?
When you mix two substances together, sometimes you'll see this solid start to form and fall to the bottom, a big sign of a chemical change.
What is a PRECIPITATE?