Show:
Mass vs Weight
Physical vs Chemical
States of Matter
Phase Changes
Potpourri
100
What is the force that gives matter weight?
What is GRAVITY.
100
Working in the chemistry lab you notice bubbles forming on a beaker across the room. You know that this is a sign of a __________________ change.
Chemical Change
100
Energy in water molecules is ______________ when water undergoes evaporation.
What is GAINED.
100
This phase change occurs when a substance changes from an ordered solid state to a less ordered liquid state.
What is MELTING.
100
If you received a piece of gold jewelry as a gift, what property of matter would you investigate to confirm it was real gold?
What is DENSITY. The density of gold is always the density of gold. Gold is Gold.
200
Define MASS.
The amount of matter an object contains.
200
When iron/steel warms it expands (like in the Mackinac Bridge). Luckily though, engineers have designed bridges to "move" and "flex" with changes in temperature. When the "MIGHTY MAC" expands in the summer, this is an example of a chemical change. TRUE or FALSE?
What is FALSE. It is a physical change.
200
When a substance goes directly from a solid to a gas (phase change).
What is SUBLIMATION.
200
Because water ____________ when it freezes, it often gets in the cracks of sidewalks and roads in the winter time and cracks them.
What is EXPANDS/INCREASES VOLUME
200
Which term does not belong with a "physical change/property"? Physical changes can result in a change in: VOLUME, MASS, DENSITY, SHAPE
What is DENSITY. If you are changing the density of something, you are changing its molecular composition and thus its identity.
300
You travel to a strange planet and you find that your weight is heavier there than on Earth. Is the force of gravity on this strange planet stronger or weaker than it is on Earth?
What is STRONGER.
300
The molecular structure of a substance undergoes changes during a chemical reaction (change). TRUE or FALSE?
What is TRUE. The atoms are re-arranged.
300
On a "phase change" diagram there are level parts (slope=0) where no energy is gained. What is occurring in this section of the graph?
What is a PHASE CHANGE!!!!
300
This phase change occurs when a substance goes directly from a gas to a solid.
What is DEPOSITION.
300
Water exists in all 3 phases on planet Earth. Give an example of each phase (do not just put solid, liquid, gas).
What is Iceberg Snow Hail Ice Shelves Ice Caps Glaciers Oceans Lakes Rivers Streams Rain Ponds CLOUDS/WATER VAPOR. Did I miss any?
400
Two objects, A and B, have the exact same volume (18 mL) however they have different masses. If object B has a mass of 18 grams, and object A has a mass of 9 grams, which object has the lower density?
What is OBJECT A (0.5g/mL)
400
When water evaporates off the surface of a lake, it changes it volume. Is this an example of a physical or chemical change?
What is a Physical Change. Phase changes are physical changes!
400
Water in a solid state is ___________ dense than water in a liquid state. Typically, substances in a solid state are _____________ dense than in their liquid state.
What is LESS and MORE
400
_________________ occurs at all temperatures and is why the water level of a glass of water left out over a period of time will decrease.
What is EVAPORATION.
400
What are you going to do to prepare for this checkpoint additionally? (other than this jeopardy review)
What is ANYTHING. Review your notes. Review worksheets/labs/simulations we have completed in class. Go on the internet, it is not all worthless garbage. Make flash cards, review with friends and family members. STUDY!