Answer the following question given this paragraph: Scientists usually begin an investigation with facts. A fact is a bit of information that is true. Facts come from data collected from observations. Facts can also come from experiments that have been run. Data is factual information that results from an investigation. Facts and data are not subject to opinion or bias. An opinion is someone's subjective view or position on a subject. Q: In science, what is a bit of information that is true? Choices: - lie - theory - falsehood - a fact A:
a fact
(Question)
Answer the following question given this paragraph: Chemists are involved in the design and production of new materials. Some of the materials that chemists have helped discover or develop in recent years include polymers, ceramics, adhesives, coatings, and liquid crystals. Liquid crystals are used in electronic displays, as in watches and calculators. The silicon-based computer chip has revolutionized modern society and chemists have played a key role in their design and continued improvement. The calculator shown below uses both a liquid crystal display and chips inside the device. Q: Polymers, ceramics, adhesives, coatings, and liquid crystals are examples of materials recently discovered or developed by what type of scientists? Choices: - material scientists - engineers - geologists - chemists A:
(Answer)
chemists
Ques: Answer the following question given this paragraph: Modern reptiles live in many different habitats. They can be found on every continent except Antarctica. Q: Modern members of what broad animal group live in many different habitats and are found on every continent except antarctica? Choices: - arachnids - amphibians - parasites - reptiles A:
Ans: reptiles
(Q).
Answer the following question given this paragraph: Monotreme eggs have a leathery shell, like the eggs of reptiles. The eggs are retained inside the mother's body for at least a couple of weeks. During that time, the mother provides the eggs with nutrients. Platypus females lay their eggs in a burrow. Echidna females have a pouch in which they store their eggs. Female monotremes have mammary glands but lack nipples. Instead, they "sweat" milk from a patch on their belly. Q: Females of what mammalian group have mammary glands but lack nipples? Choices: - prosauropod - Eutheria - Metatheria - monotreme A:
(A).
monotreme
Ques:Answer the following question given this paragraph: Most of the body's resistance is in its dry skin. When wet, salts go into ion form, lowering the resistance significantly. The interior of the body has a much lower resistance than dry skin because of all the ionic solutions and fluids it contains. If skin resistance is bypassed, such as by an intravenous infusion, a catheter, or exposed pacemaker leads, a person is rendered microshock sensitive. In this condition, currents about 1/1000 those listed in Table 20.3 produce similar effects. During open-heart surgery, currents as small as 20 A can be used to still the heart. Stringent electrical safety requirements in hospitals, particularly in surgery and intensive care, are related to the doubly disadvantaged microshock-sensitive patient. The break in the skin has reduced his resistance, and so the same voltage causes a greater current, and a much smaller current has a greater effect. Q: What is lowered when salts go into ion form? Choices: - charge - voltage - power - resistance A:

Ans:resistance
Ques: Answer the following question given this paragraph: As pictured below ( Figure below ), some grazing animals, especially sheep and goats, eat grass right down to the roots. They may even pull the grass entirely out of the ground. Grazing animals can kill the grass. They may thin it out so much that it offers little protection to the soil. If animals are kept in the same place too long, the soil may become completely bare. The bare soil is easily eroded by wind and water. Q: By pulling out grass by its roots and over-grazing, livestock contribute to what negative process? Choices: - migration - evolution - immigration - erosion A:
Ans:
erosion