Answer the following question given this paragraph: Power is the rate at which energy is being transferred. Power tells you how many Joules per second of energy is being used to drive something. Thus power is simply the change in energy divided by the time. Since work is by definition the transfer of energy (in or out of a system), power is also equal to the work divided by the time. Efficiency tells you how efficient something is and gives a number between 0 and 1. If the efficiency is equal to 1, then the machine is perfectly efficient (that is all the power used to drive it goes to the out put of the machine with no energy losses). If the efficiency is zero, then all of the input power is lost in the machine and the machine can not output any energy. Q: What is the rate at which energy is being transferred called? Choices: - electric - force - pressure - power A:
power
(Question)
Answer the following question given this paragraph: Jellyfish spend most of their lives as medusae. They live virtually everywhere in the ocean. They prey on zooplankton, other invertebrates, and the eggs and larvae of fish. Q: What type of animal in the sea spend most of their lives as medusae? Choices: - fish - sharks - whales - jellyfish A:
(Answer)
jellyfish
Ques: Answer the following question given this paragraph: The gonads are glands that secrete sex hormones. Male gonads are called testes. They secrete the male sex hormone testosterone. The female gonads are called ovaries. They secrete the female sex hormone estrogen. Sex hormones stimulate the changes of puberty. They also control the production of sperm or eggs by the gonads. Q: What stimulates the changes of pubery? Choices: - sex education - mutation - parenting - sex hormones A:
Ans: sex hormones
(Q).
Answer the following question given this paragraph: Carbon dioxide emissions into the atmosphere from fossil fuel burning have been rising for the past several decades. Q: Emissions of what gas into the atmosphere from fossil fuel burning have been rising for the past several decades? Choices: - sulphur - oxygen - neon - carbon dioxide A:
(A).
carbon dioxide
Ques:Answer the following question given this paragraph: Photosynthesis changes light energy to chemical energy. The chemical energy is stored in the bonds of glucose molecules. Glucose, in turn, is used for energy by the cells of almost all living things. Photosynthetic organisms such as plants make their own glucose. Other organisms get glucose by consuming plants (or organisms that consume plants). Q: What does photosynthesis change light energy into? Choices: - electrical energy - carbon energy - radiation energy - chemical energy A:

Ans:chemical energy
Question: Answer the following question given this paragraph: The atomic mass is the weighted average of the masses of all isotopes of an element. Q: What is the weighted average of the masses of all isotopes of an element called? Choices: - cell mass - light mass - weight mass - atomic mass A:
Answer:
atomic mass