Answer the following question given this paragraph: Why is activation energy needed? A reaction won't occur unless atoms or molecules of reactants come together. This happens only if the particles are moving, and movement takes energy. Often, reactants have to overcome forces that push them apart. This takes energy as well. Still more energy is needed to start breaking bonds in reactants. The graphs in Figure below show the changes in energy in endothermic and exothermic reactions. Both reactions need the same amount of activation energy in order to begin. Q: What is required to break bonds in reactants? A:
OPTIONS:
- food
- gas
- protein
- energy

Answer: energy

Question: Answer the following question given this paragraph: Cells may be small in size, but they are extremely important to life. Like all other living things, you are made of cells. Cells are the basis of life, and without cells, life as we know it would not exist. You will learn more about these amazing building blocks of life when you read this chapter. Q: What basic structures are called the building blocks of life and comprise all living things? A:
OPTIONS:
- pigments
- seeds
- lipids
- cells
Answer: cells

input with options: Answer the following question given this paragraph: A variable is a factor that can change over the course of an experiment. Independent variables are factors whose values are controlled by the experimenter to determine its relationship to an observed phenomenon (the dependent variable). Dependent variables change in response to the independent variable. Q: The values of which factors are controlled by the experimenter over the course of an experiment? A:
OPTIONS:
- other variables
- independent elements
- independent approaches
- independent variables
output: independent variables

Q: Answer the following question given this paragraph: The outer planets in the solar system are giant balls of swirling gas. Earth and the other inner planets are relatively small, dense, and rocky. Most of Earth's surface is covered with water. As far as we know, Earth is also the only planet that has liquid water. Earth's atmosphere has oxygen. The water and oxygen are crucial to life as we know it. Earth appears to be the only planet in the solar system with living creatures. You can learn more about the planets in the Our Solar System chapter. Q: What is most of earth's surface covered with? A:

OPTIONS:
- insects
- sand
- silicon
- water

A: water

input: OPTIONS:
- ball
- root
- glass
- pearl Now, answer this question: Answer the following question given this paragraph: Two natural products of mollusks used for decorations and jewelry are pearls and nacre. A pearl is the hard, round object produced within the mantle of a living shelled mollusk. Pearls are produced by many bivalves when a tiny particle of sand or grit is trapped between the mantle and the shell. It's as if the mollusk has a splinter. The mollusk forms a protective covering around the irritant. Most pearls used as jewelry are made by pearl oysters and freshwater mussels; most of the ones sold are cultured and not wild. Natural pearls have been highly valued as gemstones and objects of beauty for many centuries. Q: What is the term for the hard, round object produced within the mantle of a living shelled mollusk? A:
A:
output: pearl

Question: Answer the following question given this paragraph: If the temperature of a gas sample is decreased, the volume decreases as well. Q: If the temperature of a gas sample is decreased, what happens to the volume? A:
OPTIONS:
- increases
- stays the same
- expands
- decreases
Answer:
decreases