Answer the following question given this paragraph: All chemical reactions, even exothermic reactions, need a certain amount of energy to get started. This energy is called activation energy . For example, activation energy is needed to start a car. Turning the key causes a spark that activates the burning of gasoline in the engine. The combustion of gas won't occur without the spark of energy to begin the reaction. Q: The energy a chemical reaction needs to get started is called what kind of energy? Choices: - function - conduction - fusion - activation A:
activation

Answer the following question given this paragraph: Abiotic factors are the nonliving parts of ecosystems. They include air, sunlight, soil, water, and minerals. These are all things that are needed for life. They determine which living things and how many of them an ecosystem can support. Figure below shows an ecosystem and its abiotic factors. Q: What is the name for the nonliving parts of ecosystems? Choices: - diverse factors - nucleic factors - Dead factors - abiotic factors A:
abiotic factors

Answer the following question given this paragraph: The largest known virus, called mimivirus, is so large that scientists first mistook it for a bacterium. It was first discovered in amoeba, in 1992, and was identified as a virus in 2003. Scientists believe that mimivirus may cause certain types of pneumonia in humans. The core contains DNA, with the majority of the DNA in genes, and only 10% DNA of unknown function ("junk" DNA). Q: What is the largest known virus? Choices: - polyomavirus - influenza virus - pneumonia virus - mimivirus A:
mimivirus