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by BlastRoom
Students model how particle motion, temperature, and state change during phase changes.
#us_grade_7_science
20 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
A solid sample is warmed in a water bath until it becomes a liquid, but its substance does not change. Which phase change occurred?
During boiling, liquid water becomes water vapor. Which particle model best describes the change?
A pure substance is heated. Its temperature stays at 0°C while solid and liquid are both present. What is the added energy doing?
Liquid water freezes in an ice tray. If the solid ice is warmed enough, which reverse change is expected?
Liquid wax is cooled until it hardens into a solid candle while remaining wax. Which phase change occurred?
An ice cube is melting into a puddle. How do the particles in the solid part of the cube move, compared with the particles in the puddle?
Pure water boils at 100°C at normal pressure, and its temperature stays 100°C while liquid and gas are present. What does added energy do?
Water vapor in a closed flask touches a cold glass surface and changes into tiny liquid drops. Which phase change occurred?
A gas sample is cooled until it becomes a liquid. What particle change explains the condensation?
A pure liquid cools and begins freezing at 45°C. The temperature stays 45°C until all of it is solid. What is happening to particle arrangement?
A pure liquid is heated until bubbles form throughout the liquid and gas escapes from the surface. Which phase change is being observed?
A metal sample melts when heated from solid to liquid. If the liquid metal is cooled below its freezing point, what reverse change occurs?
Water in an ice cube tray freezes inside a freezer. What happens to the water's thermal energy?
Steam is cooled at normal pressure. The temperature stays 100°C while gas and liquid water are both present. What does the flat temperature show?
A solid gallium bead rests in a warm hand and turns into liquid gallium without forming a new substance. Which phase change occurred?
While a liquid changes into a gas, why can the gas fill a whole container?
A heating curve plots temperature versus time for a pure solid. The line becomes flat at the melting point. Which plotted quantity stays constant during the flat part?
Water is boiled into vapor in a kettle. If that vapor later loses thermal energy on a cool lid, what reverse process occurs?
A solid is melting, but it has not become a gas. What particle spacing model fits the liquid that forms?
Water drops with a mass of 2 g sit on glass inside a sealed box. A lamp warms them until all of them become water vapor. What is the mass of the vapor?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
All Living Things Are Made of Cells
20 questions
