Q: Laura adds 50 mL of boiling water to 100 mL of ice water. If the 150 mL of water is then put into a freezer, at what temperature will the water freeze? OPTIONS:
- 0C
- 15C
- 37C
- 50C
A: 0C

Scientists conduct investigations to answer questions. Before making a valid conclusion, scientists must
OPTIONS:
- collect relevant evidence
- tell people about the data
- publish results from the investigation
- discuss the investigation with other scientists

collect relevant evidence

Q: A fox gave birth to an offspring that had a better sense of hearing than most foxes. How could this small change most likely result in descendants that are different from the original fox? ---- OPTIONS:
- Foxes that have a better sense of hearing may mutate more frequently than other foxes.
- Foxes that have a better sense of hearing may be hunted more frequently.
- Over time, descendants of this fox may hear and hunt prey better than other foxes.
- Over time, descendants of this fox may become extinct.

A: Over time, descendants of this fox may hear and hunt prey better than other foxes.

Which sequence correctly shows the levels of organization for structure and function in a human?
===
OPTIONS:
- cell -> tissue -> organ -> organ system
- organ system -> cell -> tissue -> organ
- tissue -> organ -> organ system -> cell
- cell -> organ -> tissue -> organ system

cell -> tissue -> organ -> organ system

Question:
Scientists claim that the continents of South America and Africa were once a single landmass. All of the following observations support this claim except
OPTIONS:
- the mountains on these continents have similar rocks of the same age.
- these continents appear to fit together like the pieces of a puzzle.
- similar fish live in the ocean off the coasts of these continents.
- the same kinds of fossils have been found on these continents.
Answer:
similar fish live in the ocean off the coasts of these continents.

Question:
What two gases make up most of the Earth's atmosphere?
OPTIONS:
- Hydrogen and oxygen
- Hydrogen and nitrogen
- Oxygen and carbon dioxide
- Oxygen and nitrogen
Answer:
Oxygen and nitrogen