Answer the following question given this paragraph: Soil erosion is a natural occurrence. However, human activities have greatly accelerated soil erosion. In some locations, soil may now be eroding about 10 times faster than its natural rate. Since Europeans settled in the United States, approximately one-third of the topsoil has eroded away. Q: Since europeans settled in the united states, about what percentage of topsoil has eroded away? Choices: - 42 percent - 10 percent - 25 percent - 33 percent A:
33 percent
(Question)
Answer the following question given this paragraph: Pure metals may be less useful than mixtures of metals, called alloys. Examples of alloys include steel, bronze, and brass. Q: Steel, bronze, and brass are examples of what? Choices: - oxides - compounds - chemicals - alloys A:
(Answer)
alloys
Ques: Answer the following question given this paragraph: The first and longest phase of mitosis is prophase . During prophase, chromatin condenses into chromosomes, and the nuclear envelope, or membrane, breaks down. In animal cells, the centrioles near the nucleus begin to separate and move to opposite poles (sides) of the cell. As the centrioles move, a spindle starts to form between them. The spindle, shown in Figure below , consists of fibers made of microtubules. Q: What is the first phase of mitosis? Choices: - metaphase - telophase - meiosis - prophase A:
Ans: prophase
(Q).
Answer the following question given this paragraph: Increasing or decreasing the temperature of a system at equilibrium is also a stress to the system. The equation for the Haber-Bosch process is written again below, as a thermochemical equation. Q: What effect does changing temperature have on a system at equilibrium? Choices: - movement - the height - energy - stress A:
(A).
stress
Ques:Answer the following question given this paragraph: Cells that divide uncontrollably may form a tumor , or abnormal mass of cells. Tumors may be benign or malignant. Benign tumors remain localized and generally do not harm health. Malignant tumors are cancerous. There are no limits to their growth, so they can invade and damage neighboring tissues. Cells from malignant tumors may also break away from the tumor and enter the bloodstream. They are carried to other parts of the body, where new tumors may form. The most common and the most deadly cancers for U. S. adults are listed in Table below . Q: What do you call an abnormal mass of cells that is dividing improperly? Choices: - bumps - appendages - molars - tumor A:

Ans:tumor
Ques: Answer the following question given this paragraph: Volcanoes rise where magma forms underground. Volcanoes are found at convergent plate boundaries and at hotspots. Volcanic activity is found at divergent plate boundaries. The map in Figure below shows where volcanoes are located. Q: When this forms underground, volcanoes rise? Choices: - pumice - soil - CO2 - magma A:
Ans:
magma