Q: In stars like our sun, hydrogen atoms join together to create what? A:

OPTIONS:
- water molecule
- oxygen atom
- iron atom
- helium atom

Answer: helium atom

Q: What happens when turgid cells in a nonwoody tissue push against each other? A:

OPTIONS:
- the tissue dies
- the tissue melts
- the tissues merge
- the tissue stiffens

Answer: the tissue stiffens

Q: What may have developed to help our ancestors distinguish between ripe and unripe fruits? A:

OPTIONS:
- fine motor skills
- acute hearing
- night vision
- color vision

Answer: color vision

Q: What shape is each face of a tetrahedron? A:

OPTIONS:
- asymmetric triangle
- oval
- trapezoid
- equilateral triangle

Answer:
equilateral triangle