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

Q: Where does all igneous rock come from? Choices: - the moon - stratosphere - oceans - magma or lava A:
magma or lava

Q: Q: The actinides are all what type of elements? Choices: - large - nuclear - multiple - radioactive A:
A: radioactive

Question: 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*
Q: What chemical affects the onset of puberty and duration? Choices: - steroids - enzymes - acids - hormones A:
**Answer**
hormones

Q: What is the name for a combination of elements that acts as a different substance? Choices: - contrast - mixture - solution - compound A:
compound