Answer the following question given this paragraph: The sparks from a steel grinder are molten iron. The iron reacts with oxygen to form iron(III) oxide. Q: When sparks from a steel grinder react with oxygen, what do they form? Choices: - rust - spontaneous combustion - steel oxide - iron oxide A:
iron oxide
Answer the following question given this paragraph: Contact metamorphism occurs when a rock is altered by heat from a nearby magma. Q: When a rock is altered by heat from a nearby magma, what occurs? Choices: - sublimation - evaporation - form metamorphism - contact metamorphism A:
contact metamorphism
Q: Answer the following question given this paragraph: the history of galactic evolution has been, and the nature of space in their vicinity. However, so many black holes are now known that correlations between black hole mass and galactic nuclei characteristics are being studied. What is the mechanism for the energy output of quasars? These distant and extraordinarily energetic objects now seem to be early stages of galactic evolution with a supermassive black-hole-devouring material. Connections are now being made with galaxies having energetic cores, and there is evidence consistent with less consuming, supermassive black holes at the center of older galaxies. New instruments are allowing us to see deeper into our own galaxy for evidence of our own massive black hole. Q: What distant and extraordinarily energetic objects now seem to be early stages of galactic evolution with a supermassive black-hole-devouring material? Choices: - pulsars - stars - neutrinos - quasars A:
A: quasars
Question: Answer the following question given this paragraph: Sponges come in a variety of shapes and sizes. For example, they may be shaped like tubes, fans, cones, or just blobs. They range in diameter from about a centimeter (0.4 inches) to over a meter (3.3 feet). Many species live in colonies that may be quite large. Adult sponges are sessile. This means they are unable to move from place to place. Root-like projections anchor them to solid surfaces such as rocks and reefs. Q: Root-like projections anchor adults of what colony-dwelling animals to solid surfaces such as rocks and reefs? Choices: - anemones - corals - molluscs - sponges A:
Answer: sponges
*Question*
Answer the following question given this paragraph: New mitochondria and chloroplasts are produced through a process similar to binary fission. Bacteria also reproduce through binary fission. Q: How do bacteria reproduce? Choices: - budding - nuclear fission - sexual reproduction - binary fission A:
**Answer**
binary fission
Answer the following question given this paragraph: Q: Scientists use a quantity called __________ as a measure of disorder, or randomness. Choices: - chance level - motion - vector count - entropy A:
entropy