Answer the following question given this paragraph: Vascular disorders involve problems with blood flow. For example, a stroke occurs when a blood clot blocks blood flow to part of the brain. Brain cells die quickly if their oxygen supply is cut off. This may cause paralysis and loss of other normal functions, depending on the part of the brain that is damaged. Q: Vascular disorders involve problems with the flow of what? Choices: - mucus - bacteria - saliva - blood A:
blood
(Question)
Answer the following question given this paragraph: Many prokaryotes have an extra layer, called a capsule, outside the cell wall. The capsule protects the cell from chemicals and drying out. It also allows the cell to stick to surfaces and to other cells. Because of this, many prokaryotes can form biofilms, like the one shown in Figure below . A biofilm is a colony of prokaryotes that is stuck to a surface such as a rock or a host's tissues. The sticky plaque that collects on your teeth between brushings is a biofilm. It consists of millions of bacteria. Q: A biofilm is a colony of what that is stuck to a surface such as a rock or a host's tissues? Choices: - insects - eukaryotes - vacuoles - prokaryotes A:
(Answer)
prokaryotes
Ques: Answer the following question given this paragraph: Collisions of gas particles are elastic, so no energy is lost. Q: When gas particles collide, what kinds of collisions are these considered? Choices: - inelastic - perfect - conservative - elastic A:
Ans: elastic
(Q).
Answer the following question given this paragraph: During World War II, battleships and submarines carried echo sounders. Their goal was to locate enemy submarines ( Figure below ). Echo sounders produce sound waves that travel outward in all directions. The sound waves bounce off the nearest object and then return to the ship. Scientists know the speed of sound in seawater. They then can calculate the distance to the object that the sound wave hit. Most of these sound waves did not hit submarines. They instead were used to map the ocean floor. Q: What produces sound waves that travel outward in all directions in water? Choices: - echo chamber - ultrasound machines - amplifiers - echo sounders A:
(A).
echo sounders
Ques:Answer the following question given this paragraph: The volume of a gas increases as the Kelvin temperature increases. Q: What happens to the volume of a gas as the kelvin temperature increases? Choices: - it decreases - it drops - it continues - it increases A:

Ans:it increases
Ques: Answer the following question given this paragraph: Just as the burning of wood releases energy in the form of heat, many other chemical reactions also release heat. There are also chemical reactions, such as photosynthesis in plants, which absorb energy in the form of heat. The study of energy changes in chemical reactions is called thermochemistry . The broader term thermodynamics also looks at how heat, work, and various forms of energy are related to one another. In this lesson, we will study the difference between reactions that absorb versus release heat as well as how to measure this change in energy. Q: What branch of physical science looks at how heat, work, and various forms of energy are related to one another? Choices: - photosynthesis - frigidity - transformations - thermodynamics A:
Ans:
thermodynamics