{ "title": "Science Basics O/X", "description": "Everyday facts about the natural world", "languageCode": "en", "cards": [ { "type": "ox", "prompt": "Water freezes at 0 degrees Celsius at standard atmospheric pressure.", "answer": true, "explanation": "At standard pressure, water turns to ice at 0 degrees Celsius (32 degrees Fahrenheit)." }, { "type": "ox", "prompt": "The Sun is a star.", "answer": true, "explanation": "The Sun is the star at the center of our Solar System, producing light and heat by nuclear fusion." }, { "type": "ox", "prompt": "Humans breathe in oxygen and breathe out carbon dioxide.", "answer": true, "explanation": "In respiration, we take in oxygen and release carbon dioxide as a waste product." }, { "type": "ox", "prompt": "Plants make their own food through photosynthesis.", "answer": true, "explanation": "Plants use sunlight, water, and carbon dioxide to make food through photosynthesis." }, { "type": "ox", "prompt": "The chemical formula for water is H2O.", "answer": true, "explanation": "Each water molecule is made of two hydrogen atoms and one oxygen atom, written as H2O." }, { "type": "ox", "prompt": "Sound travels slower than light.", "answer": true, "explanation": "Light travels far faster (about 300,000 km/s) than sound (about 340 m/s in air)." }, { "type": "ox", "prompt": "The Earth is the largest planet in the Solar System.", "answer": false, "explanation": "Jupiter is the largest planet; the Earth is much smaller." }, { "type": "ox", "prompt": "A healthy human has two hearts.", "answer": false, "explanation": "A human normally has one heart that pumps blood around the body." }, { "type": "ox", "prompt": "The Sun revolves around the Earth.", "answer": false, "explanation": "The Earth and other planets orbit the Sun, not the other way around." }, { "type": "ox", "prompt": "Bats are a kind of bird.", "answer": false, "explanation": "Bats can fly, but they are mammals that feed milk to their young, not birds." }, { "type": "ox", "prompt": "Diamond is made of gold.", "answer": false, "explanation": "Diamond is made of carbon atoms, not gold." }, { "type": "ox", "prompt": "A year on Earth is exactly 100 days long.", "answer": false, "explanation": "A year on Earth is about 365 days, the time it takes to orbit the Sun once." }, { "type": "ox", "prompt": "A bolt of lightning is hotter than the surface of the Sun.", "answer": true, "explanation": "Lightning can heat the air to around 30,000 degrees Celsius, several times hotter than the Sun's surface, which is about 5,500 degrees Celsius." }, { "type": "ox", "prompt": "Humans use only 10 percent of their brains.", "answer": false, "explanation": "This is a popular myth. Brain scans show that virtually all parts of the brain are active, and we use the whole brain over the course of a day." }, { "type": "ox", "prompt": "Goldfish can only remember things for three seconds.", "answer": false, "explanation": "Goldfish actually have memories lasting weeks or months; they can even be trained to respond to signals." }, { "type": "ox", "prompt": "More than half of the adult human body is water.", "answer": true, "explanation": "Water makes up roughly 60 percent of an adult's body weight, filling cells, blood, and other fluids." }, { "type": "ox", "prompt": "Sound cannot travel through a vacuum.", "answer": true, "explanation": "Sound needs a medium like air, water, or solids to travel. In the empty vacuum of space there is nothing to carry the vibrations." }, { "type": "ox", "prompt": "Penguins live in the wild at the North Pole.", "answer": false, "explanation": "Wild penguins live only in the Southern Hemisphere, such as Antarctica; polar bears, not penguins, live in the Arctic." }, { "type": "ox", "prompt": "An octopus has three hearts.", "answer": true, "explanation": "An octopus has one main heart that pumps blood around the body and two extra hearts that pump blood through the gills." }, { "type": "ox", "prompt": "Earth's seasons are caused by the planet being closer to the Sun in summer.", "answer": false, "explanation": "Seasons are caused by the tilt of Earth's axis, which changes how directly sunlight hits each hemisphere, not by the distance to the Sun." }, { "type": "ox", "prompt": "The blood inside your veins is blue.", "answer": false, "explanation": "Blood is always red; it is darker when low in oxygen. Veins only look bluish because of how light passes through skin." }, { "type": "ox", "prompt": "Venus is the hottest planet in the Solar System.", "answer": true, "explanation": "Although Mercury is closer to the Sun, Venus is hotter because its thick carbon dioxide atmosphere traps heat, keeping the surface around 460 degrees Celsius." }, { "type": "ox", "prompt": "The Moon's gravity is the main cause of ocean tides on Earth.", "answer": true, "explanation": "The Moon's gravitational pull on Earth's oceans is the main driver of the tides, with the Sun adding a smaller effect." }, { "type": "ox", "prompt": "Botanically, a tomato is a vegetable.", "answer": false, "explanation": "Botanically, a tomato is a fruit because it develops from a flower and contains seeds, even though it is used as a vegetable in cooking." }, { "type": "ox", "prompt": "An adult human skeleton normally has 206 bones.", "answer": true, "explanation": "Babies are born with about 300 bones, but many fuse during growth, leaving an adult with 206 bones." }, { "type": "ox", "prompt": "Sharks are fish.", "answer": true, "explanation": "Sharks are fish with skeletons made of cartilage instead of bone, and they breathe through gills like other fish." }, { "type": "ox", "prompt": "Antibiotics can cure illnesses caused by viruses.", "answer": false, "explanation": "Antibiotics only work against bacteria. Viral illnesses like colds and flu are not cured by antibiotics." }, { "type": "ox", "prompt": "Sound travels faster in air than in water.", "answer": false, "explanation": "Sound travels about four times faster in water than in air, because water molecules are packed closer together." }, { "type": "ox", "prompt": "Spiders have eight legs.", "answer": true, "explanation": "Spiders are arachnids with eight legs, which sets them apart from insects, which have six." }, { "type": "ox", "prompt": "Lightning never strikes the same place twice.", "answer": false, "explanation": "Lightning often strikes the same spot repeatedly; tall structures like skyscrapers are hit many times every year." }, { "type": "ox", "prompt": "Iron is attracted to magnets.", "answer": true, "explanation": "Iron is a ferromagnetic metal, which means magnets pull on it strongly; many other metals, like copper, are not attracted." }, { "type": "ox", "prompt": "Bulls charge because the color red makes them angry.", "answer": false, "explanation": "Cattle cannot see red the way humans do. Bulls react to the movement of the cape, not its color." }, { "type": "ox", "prompt": "Ostriches bury their heads in the sand when they are scared.", "answer": false, "explanation": "This is a myth. Ostriches may lower their heads to the ground or run away, but they do not bury their heads in sand." }, { "type": "ox", "prompt": "Earth's atmosphere is made up mostly of nitrogen.", "answer": true, "explanation": "Air is about 78 percent nitrogen and about 21 percent oxygen, with small amounts of other gases." }, { "type": "ox", "prompt": "A rainbow forms when sunlight is bent and reflected by water droplets.", "answer": true, "explanation": "Raindrops refract and reflect sunlight, splitting it into its different colors and creating a rainbow." }, { "type": "ox", "prompt": "Early humans lived at the same time as dinosaurs like Tyrannosaurus rex.", "answer": false, "explanation": "Non-bird dinosaurs died out about 66 million years ago, tens of millions of years before the first humans appeared." } ] }