Q: What is the term for the breakdown of unstable isotopes into stable elements? Read this paragraph and choose the correct option from the provided answers: Radioactive decay is the breakdown of unstable isotopes into stable elements. For example, carbon-14 is an unstable isotope of carbon that decays to the stable element nitrogen-14. The rate of decay of an isotope is measured in half-lives. A half-life is the time it takes for half a given amount of an isotope to decay. Choices: - isotopic decay - radioactive decrease - secondary decay - radioactive decay A:
radioactive decay

Q: What is an ionic compound that produces negative hydroxide ions when dissolved in water Read this paragraph and choose the correct option from the provided answers: A base is an ionic compound that produces negative hydroxide ions when dissolved in water. Bases taste bitter and turn red litmus paper blue. Choices: - catalyst - acid - isomer - base A:
base

Q: Q: To solubilize the fats so that they can be absorbed, what organ secretes a fluid called bile into the small intestine? Read this paragraph and choose the correct option from the provided answers: A related mechanism allows us to absorb and digest the fats in buttered popcorn and French fries. To solubilize the fats so that they can be absorbed, the gall bladder secretes a fluid called bile into the small intestine. Bile contains a variety of bile salts, detergent-like molecules that emulsify the fats. Choices: - small intestine - stomach - spleen - gall bladder A:
A: gall bladder

Question: Q: A comet striking the earth may have caused mass extinction, this would have decreased sunlight, which would have effected what plant process reducing food? Read this paragraph and choose the correct option from the provided answers: At the end of the Cretaceous Period, or 65 million years ago, all dinosaurs (except those which led to birds) went extinct. Some scientists believe a possible cause is a collision between the Earth and a comet or asteroid. The collision could have caused tidal waves, changed the climate, and reduced sunlight by 10-20%. A decrease in photosynthesis would have resulted in less plant food, leading to the extinction of the dinosaurs. Choices: - fertilization - decomposition - glycolysis - photosynthesis A:
Answer: photosynthesis

*Question*
Q: New seafloor forms when what object cools? Read this paragraph and choose the correct option from the provided answers: The seafloor spreading hypothesis brought all of these observations together in the early 1960s. Hot mantle material rises up at mid-ocean ridges. The hot magma erupts as lava. The lava cools to form new seafloor. Later, more lava erupts at the ridge. The new lava pushes the seafloor that is at the ridge horizontally away from ridge axis. The seafloor moves!. Choices: - ash - debris - rain - lava A:
**Answer**
lava

Q: Where is multiple fission more often observed? Read this paragraph and choose the correct option from the provided answers: Binary fission in various single-celled organisms (left). Cell division is a relatively simple process in many single-celled organisms. Eventually the parent cell will pinch apart to form two identical daughter cells. In multiple fission (right), a multinucleated cell can divide to form more than one daughter cell. Multiple fission is more often observed among protists. Choices: - among multi-celled organisms - among animals - among vertebrates - among protists A:
among protists