Answer the following question given this paragraph: fossils and birds, specifically in the structure of the hip and wrist bones, as well as the presence of the wishbone, formed by the fusing of the clavicles. One important fossil of an animal intermediate to dinosaurs and birds is Archaeopteryx, which is from the Jurassic period (Figure 29.33). Archaeopteryx is important in establishing the relationship between birds and dinosaurs, because it is an intermediate fossil, meaning it has characteristics of both dinosaurs and birds. Some scientists propose classifying it as a bird, but others prefer to classify it as a dinosaur. The fossilized skeleton of Archaeopteryx looks like that of a dinosaur, and it had teeth whereas birds do not, but it also had feathers modified for flight, a trait associated only with birds among modern animals. Fossils of older feathered dinosaurs exist, but the feathers do not have the characteristics of flight feathers. Q: The fossilized skeleton of archaeopteryx looks like that of a dinosaur, but it had what structures modified for flight, a trait associated only with birds among modern animals? Choices: - fingers - claws - beaks - feathers A:
feathers
Answer the following question given this paragraph: Great volcanic explosions and glowing red rivers of lava are fascinating. All igneous rock comes from magma or lava. Remember that magma is molten rock that is below Earth's surface. Lava is molten rock at Earth's surface. Q: Where does all igneous rock come from? Choices: - the moon - stratosphere - oceans - magma or lava A:
magma or lava
Q: Answer the following question given this paragraph: actinide: The actinides are the 14 elements from thorium (atomic number 90) to lawrencium (atomic number 103). The sublevel is in the process of being filled. The actinides are all radioactive elements and only the first four have been found naturally on Earth. Q: The actinides are all what type of elements? Choices: - large - nuclear - multiple - radioactive A:
A: radioactive
Question: Answer the following question given this paragraph: Q: The symbol for each what is usually the first letter or two of its name? Choices: - state - property - material - element A:
Answer: element
*Question*
Answer the following question given this paragraph: Puberty lasts from about ages 12 to 18 years and is controlled by hormones. Q: What chemical affects the onset of puberty and duration? Choices: - steroids - enzymes - acids - hormones A:
**Answer**
hormones
Answer the following question given this paragraph: An element is a fundamental chemical part of a substance; there are about 115 known elements. A compound is a combination of elements that acts as a different substance; there are over 50 million known substances. Q: What is the name for a combination of elements that acts as a different substance? Choices: - contrast - mixture - solution - compound A:
compound