Question: Answer the following question given this paragraph: There are two common ways to measure pH. When only an approximate pH value is needed, an inexpensive test involves the use of acid-base indicators , which change color based on the relative acidity of the solution. One type of common indicator is litmus paper. For example, if a piece of litmus paper is dipped into an acidic solution (pH below ~4.5), it will turn red, and dipping it into a basic solution (pH above ~8.5) will turn it blue. Solutions of intermediate pH will result in various shades of purple. Because different indicators change color at different pH values, the use of multiple indicators can generally narrow down the possible pH of a solution to a range of about 0.5-1 pH units. Figure below shows the colors exhibited by various indicators at different pH values. Q: How does litmus paper indicate the ph value of a solution? A:
OPTIONS:
- by texture
- by shape
- by smell
- by color
Answer: by color

input with options: Answer the following question given this paragraph: Atomic radii have been measured for elements. The units for atomic radii are picometers, equal to 10 -12 meters. As an example, the internuclear distance between the two hydrogen atoms in an H 2 molecule is measured to be 74 pm. Therefore, the atomic radius of a hydrogen atom is . Q: What unit are atomic radii typically measured in? A:
OPTIONS:
- sporozoans
- radons
- powers
- picometers
output: picometers

Q: Answer the following question given this paragraph: Most plants continue to grow throughout their lives. Like other multicellular organisms, plants grow through a combination of cell growth and cell division. Cell growth increases cell size. Cell division increases the number of cells. Q: How do plants grow? A:

OPTIONS:
- through cell growth and sexual reproduction
- through mitosis and cell division
- through pollination and cell division
- through cell growth and cell division

A: through cell growth and cell division

input: OPTIONS:
- scefitana
- scitifica
- sceria
- scentia Now, answer this question: Answer the following question given this paragraph: The Nature of Science Biology is a science, but what exactly is science? What does the study of biology share with other scientific disciplines? Science (from the Latin scientia, meaning "knowledge") can be defined as knowledge about the natural world. Science is a very specific way of learning, or knowing, about the world. The history of the past 500 years demonstrates that science is a very powerful way of knowing about the world; it is largely responsible for the technological revolutions. Q: The word science is derived from what latin word? A:
A:
output: scentia

Answer the following question given this paragraph: Isotopes have the same number of protons and electrons, but a different number of neutrons. Q: Isotopes have the same number of protons and electrons, but a different number of what? A:

OPTIONS:
- reactions
- impurities
- atoms
- neutrons

Answer: neutrons

Q: Answer the following question given this paragraph: Heavily vegetated lands are less likely to experience flooding. Plants slow down water as it runs over the land, giving it time to enter the ground. If the ground is too wet to absorb more water, plants still slow the water's passage. Slower water keeps all the water from entering the stream at once. Wetlands play a key role in minimizing the impacts of floods. Wetlands act as a buffer between land and high water levels. Flooding is often more severe in areas that have been recently logged. Q: Heavily vegetated lands are less likely to experience what? A:

OPTIONS:
- expansion
- drought
- rains
- flooding

A:
flooding