Q: Scientists dig in a dry area at the bottom of a mountain range. Fossilized shells of freshwater mussels are found in the area. Which is a likely conclusion that scientists will draw based on this evidence?

OPTIONS:
- Rivers once flowed through the area.
- Volcanoes were once active in the area.
- The ocean shoreline once reached this area.
- Floods were a common occurrence in this area.
A: Rivers once flowed through the area.
Q: A student completes several tasks while making breakfast. During which task does the student make a solution?

OPTIONS:
- adding sugar to tea
- pouring milk on cereal
- spreading jelly on toast
- sprinkling cheese on eggs
A: adding sugar to tea
Q: Scientists compared Pluto with other objects in the solar system and found that Pluto is smaller than Earth's moon. This finding caused scientists to question whether Pluto is a planet because

OPTIONS:
- Pluto gets less sunlight than Earth's moon
- the other planets are much larger than Pluto
- the other planets have moons and Pluto does not
- Pluto rotates on its axis and the other planets do not
A: the other planets are much larger than Pluto
Q: What statement describes what happens to the carbon dioxide waste produced by a developing baby during pregnancy?

OPTIONS:
- It is carried by the umbilical cord to the placenta and then to the mother's blood.
- It is released from the fetus by its breathing and then is absorbed by the placenta.
- It is released through the fetal urine and then exits through the umbilical cord.
- It is carried through shared blood vessels and then to the mother's lungs.
A:
It is carried by the umbilical cord to the placenta and then to the mother's blood.