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by BlastRoom
Judge investigations and patterns that show a field acting between objects that never touch.
#us_grade_8_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 student wants evidence that a force can act between objects that are not touching. Which investigation shows this?
A student rubs a balloon on her hair and tests it near several things. Which result is evidence that an electric force acts across a gap?
Which observation gives evidence that Earth pulls on an object it is not touching?
Two students want evidence that an electric current can affect a compass 5 cm away. Which setup would give that evidence?
A teacher wants to show students a push that happens with no contact. Which demonstration shows that?
A charged plastic rod is brought near a light foil ball hanging on a thread. Which observation would be evidence of a force acting across the gap?
A group builds an electromagnet by winding a coil around an iron nail. Which test gives evidence that its field reaches beyond the nail's surface?
A magnet under a table moves a paper clip on top. A classmate says the moving hand shook the table and slid the clip. Which change best answers that objection?
A compass needle turns when current flows in a nearby wire. A classmate says the warm wire heated the air and turned the needle. Which test best answers this?
A rubbed balloon held near an empty can makes the can roll toward it. A classmate says the floor may be sloped. Which change would settle that objection?
A student claims Earth pulls a falling ball without touching it. A classmate says moving air pushes the ball down. Which investigation best answers that objection?
Filings on paper over a bar magnet form curved lines only after the paper is tapped. A classmate says the tapping made the pattern. Which control best answers that?
Clips cling to an iron nail wrapped in a coil while current flows. A classmate says the nail was already magnetic. Which test answers that objection?
Two students measure the distance at which a magnet starts to move a paper clip. Their three trials disagree. Which change would make their evidence stronger?
Iron filings on paper over a bar magnet form curved lines packed tightly near each end and spread widely beside the middle. What does the tight packing near the ends show?
A compass carried in a circle around a current-carrying wire lies along the circle at every position, and reverses when the current reverses. What does this pattern show?
A paper clip on a bench begins to slide when an approaching magnet is 4 cm away, and is tugged harder once the magnet is 1 cm away. What does this show?
Filings sprinkled between two magnets with like poles facing form lines that bend away from each other, leaving a bare gap between the facing poles. What does the bare gap indicate?
A 1 kg mass weighs about 9.8 N at sea level, a little less on a high mountain, and far less high above Earth. What does this show about Earth's gravitational field?
A charged sphere swings a hanging foil ball far aside at 5 cm, only slightly at 15 cm, and with no visible movement at 40 cm. What does this show?
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Potential Energy Stored in Arrangements
20 questions
