Science
Surrender
Two sciences, one deck. Every number from 1 to 9 wears two coats — its order from the Sun and its atomic number. Mercury and Hydrogen are both 1. Pluto and Fluorine are both 9. Decode either one, then multiply.
Play it now 🖨 Get the printable deckDecode it. Then out-math the clock.
Two cards flip. Read the planet or the element, find its number, and fire the answer. Sixty seconds. The deck gets harder as you get better.
Speak mode listens after each deal — say “fifty-six” or “56.”
At the top rank a wild can flip in — a big atomic or cosmic number. In Multiply a wild switches the round to addition, so the answer stays reachable.
Six drills. One deck.
Same planets, same elements — six different ways to work them. Every drill runs sixty seconds and tracks your rank on its own.
Tap the card that completes it.
Bigger card first — the answer is never negative.
Tap the card whose value lands nearer the target.
Push to add another card. Bank to keep the pile — stop within 3 of the line for a +5 nerve bonus.
Do the two values add up to ten?
Decode the card, then double it.
Two sciences.
One number underneath.
Space Wars taught the solar system by its order from the Sun. Elements of Surprise taught the periodic table by atomic number. Both ladders start at one and climb to nine — so they stack. Every value in this deck answers to a planet and an element.
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1
Decode the card
See Saturn, think 6 — sixth from the Sun. See Carbon, think 6 too — six protons. Two roads to the same number.
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2
Battle the values
Two cards flip. Multiply them — Uranus × Lithium is 7 × 3 — and the first to call 21 takes both cards.
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3
Take the pile
Win rounds, win cards. Most cards wins the war. Switch to addition any time for younger players, or run a Skill Yard drill solo.
Every number, a world and an atom.
Learn the pair once and the whole deck reads on sight. Left column: order from the Sun. Right column: atomic number.
WILD Cards
Four atomic numbers, four cosmic counts. Wilds add.
The stories behind the numbers.
Every card is a real thing with a real record. Open a number to read both halves — the world and the atom that share it.
1Mercury & Hydrogen
Mercury is the smallest planet and the closest to the Sun, named for the swift Roman messenger god. A year there lasts just 88 Earth days — the fastest lap in the solar system.
Hydrogen is the lightest element and the most abundant in the universe: one proton, one electron, nothing spare. It is the fuel that keeps every star, including our Sun, burning.
2Venus & Helium
Venus is the hottest planet of all, wrapped in thick clouds that trap heat. Brilliant at dawn and dusk, it earned the name Morning Star, and it carries the name of the Roman goddess of love.
Helium was found in the Sun before it was found on Earth — spotted in sunlight during an 1868 eclipse. It is the second lightest element and refuses to react with anything.
3Earth & Lithium
Earth is the only world known to hold life, liquid water and breathable air. Third rock from the Sun — and the only planet not named for a god.
Lithium is the lightest metal on the table, light enough to float on water. It is the reason a phone or a car battery can be recharged instead of thrown away.
4Mars & Beryllium
Mars is the Red Planet, rusted by the iron in its soil and named for the Roman god of war. It holds both the tallest volcano and the deepest canyon in the solar system.
Beryllium is light, stiff and stable in deep cold — which is why the James Webb Space Telescope's mirrors are made of it.
5Jupiter & Boron
Jupiter is the giant: every other planet could fit inside it. Its Great Red Spot is a storm wider than Earth that has been turning for centuries.
Boron sits on the fence between metal and non-metal. Add it to glass and the glass stops cracking when it heats — that is why lab beakers and baking dishes survive the oven.
6Saturn & Carbon
Saturn is famous for rings of ice and rock. It is the second-largest planet, yet so light it would float if you found an ocean big enough.
Carbon is the backbone of every living thing. Rearrange the same six-proton atom and you get either pencil graphite or diamond.
7Uranus & Nitrogen
Uranus is the tilted world — it spins on its side, so its poles face the Sun. A pale blue-green ice giant with faint vertical rings.
Nitrogen makes up about 78% of every breath you take, and mostly passes straight back out. Locked in pairs, it is one of the least reactive gases there is.
8Neptune & Oxygen
Neptune is the farthest true planet and the windiest — its storms howl faster than the speed of sound. A deep blue ice giant discovered by mathematics before anyone saw it.
Oxygen is the element you cannot go three minutes without. It is also the most abundant element in Earth's crust, locked into rock and water as much as into air.
9Pluto & Fluorine
Pluto was once the ninth planet and is now the most famous dwarf planet. Its icy surface carries a giant heart-shaped plain, and one orbit around the Sun takes 248 Earth years.
Fluorine is the most reactive element on the table — it will attack almost anything. Tamed into fluoride, the same element is what hardens the enamel on your teeth.
20Calcium
Element 20 is the metal your skeleton is built from. The same element makes chalk, limestone and seashells — bone, cliff and shell are chemical cousins.
24Hours in a Day
The ancient Egyptians split daylight into twelve parts and darkness into twelve more, tracking them by stars and shadow. Their count survived every calendar reform since.
26Iron
Element 26 is where fusion inside a star stops paying — everything heavier needs a catastrophe to form. Iron also makes Earth's core, Mars's colour, and the red in your blood.
27Moon Orbit (days)
The Moon takes about 27.3 days to circle Earth once. Because Earth is moving too, the phases take a little longer to repeat — roughly 29.5 days from one full Moon to the next.
79Gold
Element 79 does not rust, tarnish or fade, which is why ancient gold still shines. Most of it was forged in collisions between neutron stars, long before Earth existed.
88Constellations
Astronomers recognise 88 official constellations, agreed in the 1920s. They are not just star pictures — together they divide the entire sky into 88 mapped regions with no gaps.
92Uranium
Element 92 is the heaviest element found in any real quantity in nature — and it is named after Uranus, the planet that sits at 7 in this same deck.
95Moons of Jupiter
Jupiter's confirmed moon count reached 95, and telescopes keep finding more. Galileo started the tally in 1610 with just four — the ones you can still spot through binoculars.
Print the deck.
Start the war.
One download: the full Science Surrender deck — nine planets, nine elements, eight wilds — sized for cardstock, with rules for both ways to play. Cut, deal, and battle for math fluency. No screens required.
Number Battle
Flip two cards, first to call the product wins the pile. Multiplication fluency under pressure.
Addition Battle
Same cards, gentler maths. Built for the youngest players at the table.
Teachers & parents put it to work as a…
- Math center
- Early-finisher activity
- Family game night
- Science warm-up
- Class tournament
- Cross-subject review
Instant digital download · Ages 7+ · Grades 3–9 · numberbattles.com
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