*Question*
Answer the following question given this paragraph: Q: Each atom has a required number of what? Choices: - matrix bonds - accretion bonds - acceleration bonds - covalent bonds A:
**Answer**
covalent bonds

*Question*
Answer the following question given this paragraph: Unlike the sponges which evolved prior to cnidarians, the cnidarians are made up of true tissues. The inside of a cnidarian is called the gastrovascular cavity , a large space that helps the organism digest and move nutrients around the body. The cnidarians also have nerve tissue organized into a net-like structure, known as a nerve-net, with connected nerve cells dispersed throughout the body. Cnidarians do not have true organs, however. Q: What is a large space that helps the organism digest & move nutrients around the cnidarian body? Choices: - thorax - abdominal wall - vacuole - gastrovascular cavity A:
**Answer**
gastrovascular cavity

*Question*
Answer the following question given this paragraph: Endothermic reactions absorb energy from the surroundings as the reaction occurs. When 1 mol of calcium carbonate decomposes into 1 mol of calcium oxide and 1 mol of carbon dioxide, 177.8 kJ of heat is absorbed. The process is shown visually in Figure above (B). The thermochemical reaction is shown below. Q: What kind of reactions absorb energy from their surroundings as they occur? Choices: - exothermic - hydrostatic - autotrophic - endothermic A:
**Answer**
endothermic

*Question*
Answer the following question given this paragraph: A: Electric charges flow when they have electric potential energy. Potential energy is stored energy that an object has due to its position or shape. Q: What is the term for stored energy that an object has due to its position or shape? Choices: - kinetic energy - mechanical energy - vertical energy - potential energy A:
**Answer**
potential energy