Q: What is the term for a mountain-building event? Choices: - glaciation - volcanism - erosion - orogeny A:
orogeny

Q: Why do hummingbirds have long narrow bills? Choices: - to feed their offspring - to store food - for protection against predators - to reach the nectar at the bottom of flowers A:
to reach the nectar at the bottom of flowers

Q: Q: What substance is removed from waste as it passes through the large intestine? Choices: - blood - nutrients - air - water A:
A: water

Question: Q: What is another name for a reasonable explanation for something that might be formed near the beginning of a scientific inquiry into a problem? Choices: - experiment - conclusion - theory - hypothesis A:
Answer: hypothesis

*Question*
Q: Chemical reactions always involve what? Choices: - fuel - heating - physical change - energy A:
**Answer**
energy

*Question*
Q: What are atoms or groups of atoms called which carry and electrical charge? Choices: - protons - molecules - electrons - ions A:
**Answer**
ions