Answer the following question given this paragraph: Q: In recent years, it has been hypothesized that molecules in the environment also act as? Choices: - pathogens - homeostasis disruptors - catalysts - endocrine disruptors A:
endocrine disruptors
(Question)
Answer the following question given this paragraph: Carbon dioxide chemically weathers rock by creating acids. Q: How does carbon dioxide chemically weather rocks? Choices: - by creating proteins - by creating water - by creating heat - by creating acids A:
(Answer)
by creating acids
Ques: Answer the following question given this paragraph: These devices are not very sensitive to low levels of radiation, but more sensitive devices are also available that reliably measure the frequency of radioactive events. One such device is the Geiger counter. A Geiger counter is a tube filled with an inert gas that will conduct electricity when exposed to charged radiation, such as alpha or beta particles. When a charged particle enters the tube, it changes the electrical potential between the anode and the cathode, and this change in potential is registered by an electrical circuit as a single radioactive event. Geiger counters are fairly inexpensive and reliable, so they are useful in a wide range of applications. More complicated types of counters are also available, but are generally used only in sophisticated experiments. Q: What is the tube-like device used to reliably measure lower levels of radiation? Choices: - Richter scale - weber counter - MRI machine - geiger counter A:
Ans: geiger counter
(Q).
Answer the following question given this paragraph: where the mass, specific heat, and change in temperature are multiplied together. Specific heat is a measure of how much energy is needed to change the temperature of a substance; the larger the specific heat, the more energy is needed to change the temperature. The units for specific heat are depending on what the unit of Tis. You may note a departure from the insistence that temperature be expressed in Kelvin. That is because a change in temperature has the same value whether the temperatures are expressed in degrees Celsius or kelvins. Q: What is a measure of how much energy is needed to change the temperature of a substance? Choices: - thermal potential - specific gravity - momentum - specific heat A:
(A).
specific heat
Ques:Answer the following question given this paragraph: Animals and some bacteria and fungi carry out lactic acid fermentation. Lactic acid is a waste product of this process. Our muscles perform lactic acid fermentation during strenuous exercise, since oxygen cannot be delivered to the muscles quickly enough. The buildup of lactic acid is believed to make your muscles sore after exercise. Bacteria that produce lactic acid are used to make cheese and yogurt. The lactic acid causes the proteins in milk to thicken. Lactic acid also causes tooth decay, because bacteria use the sugars in your mouth for energy. Q: During strenuous exercise our muscles perform what kind of fermentation? Choices: - nitric acid - residual acid - excessive acid - lactic acid A:

Ans:lactic acid
Ques: Answer the following question given this paragraph: Look at the rock layers pictured below ( Figure below ); they show a feature called Hutton's unconformity. The unconformity was discovered by James Hutton in the 1700s. Hutton saw that the lower rock layers are very old. The upper layers are much younger. There are no layers in between the ancient and recent layers. Hutton thought that the intermediate rock layers eroded away before the more recent rock layers were deposited. Q: As per hutton's unconformity, what happened to the intermediate layers of rock? Choices: - they metamorphized - they fused - they expanded - they eroded away A:
Ans:
they eroded away