If burning oak is used to produce heat, then what is burned to produce heat? Answer choices: - pine - wood - gravity - Coal - clouds - oak - elms - air
oak

If soil comes from rocks, then where does soil come from? Answer choices: - fields - magma - earth - rocks - volcanoes - crust - down - water
rocks

If arteries generally carry something bright red, then what generally carries something bright red? Answer choices: - bears - veins - arteries - mammals - nerves - fur seals - Cars - bones
arteries