Q: What type of waves radiate energy out from an earthquake's focus? Read this paragraph and choose the correct option from the provided answers: Geologists study earthquake waves to "see" Earth's interior. Waves of energy radiate out from an earthquake's focus. These are called seismic waves ( Figure below ). Seismic waves change speed as they move through different materials. This causes them to bend. Some seismic waves do not travel through liquids or gases. Scientists use all of this information to understand what makes up the Earth's interior. Choices: - Microwaves - abnormal - volcanic - seismic A:
seismic

(Question)
Q: What type of barrier physically blocks pathogens from entering the body? Read this paragraph and choose the correct option from the provided answers: Mechanical barriers physically block pathogens from entering the body. The skin is the most important mechanical barrier. In fact, it is the single most important defense the body has. The outer layer of the skin is tough and very difficult for pathogens to penetrate. Choices: - Solid - potential - molecular - mechanical A:
(Answer)
mechanical

Ques: Q: What is the smallest main part of the brain? Read this paragraph and choose the correct option from the provided answers: The brain stem is the smallest of the three main parts of the brain. It lies directly under the cerebrum. The brain stem controls basic body functions, such as breathing, heartbeat, and digestion. The brain stem also carries information back and forth between the cerebrum and spinal cord. Choices: - the cortex - the claw - the cerebellum - the stem A:
Ans: the stem

(Q).
Q: During what do homologous chromosomes separate and go to different daughter cells? Read this paragraph and choose the correct option from the provided answers: Overview of Meiosis. During meiosis, homologous chromosomes separate and go to different daughter cells. This diagram shows just the nuclei of the cells. Notice the exchange of genetic material that occurs prior to the first cell division. Choices: - birth - mitosis - electrolysis - meiosis A:
(A).
meiosis

Ques:Q: What type of gases trap heat in the atmosphere, causing earth to have a moderate temperature? Read this paragraph and choose the correct option from the provided answers: Greenhouse gases trap heat in the atmosphere. This is essential so that Earth has a more moderate temperature. Without greenhouse gases, nighttime temperatures would be frigid. Natural greenhouse gases include carbon dioxide, methane, water vapor, and ozone. CFCs and some other man-made compounds are also greenhouse gases. Human activities may increase the amount of greenhouse gases, like carbon dioxide, in the atmosphere. Choices: - ozone gases - carbon monoxides - sulfuric gases - greenhouse gases A:

Ans:greenhouse gases

Ques:Q: What destroys the filtered pathogens? Read this paragraph and choose the correct option from the provided answers: Lymphatic vessels make up a body-wide circulatory system. The fluid they circulate is lymph. Lymph is a fluid that leaks out of capillaries into spaces between cells. As the lymph accumulates between cells, it diffuses into tiny lymphatic vessels. The lymph then moves through the lymphatic system from smaller to larger vessels. It finally drains back into the bloodstream in the chest. As lymph passes through the lymphatic vessels, pathogens are filtered out at small structures called lymph nodes (see Figure above ). The filtered pathogens are destroyed by lymphocytes. Choices: - parasites - neutrophils - antibodies - lymphocytes A:

Ans:
lymphocytes