Answer the following question given this paragraph: A friend whispers to you in class in a voice so soft that you have to lean very close to hear what he's saying. Later that day, your friend shouts to you across the football field. Now his voice is loud enough for you to hear him clearly even though he's many meters away. Obviously, sounds can vary in loudness. Loudness refers to how loud or soft a sound seems to a listener. The loudness of sound is determined, in turn, by the intensity of sound. Intensity is a measure of the amount of energy in sound waves. The unit of intensity is the decibel (dB) . Q: What is the measure of the amount of energy found in sound waves? Choices: - decibels - density - frequency - intensity A:
intensity
(Question)
Answer the following question given this paragraph: Lakes, ponds, streams, springs, and wetlands are fresh water bodies. The organisms that live in them are part of freshwater ecosystems. These ecosystems vary by temperature, pressure (in lakes), and the amount of light that penetrates. The type of plants that grow in these ecosystems varies. Q: Lakes, ponds, streams, springs, and wetlands are? Choices: - salt water bodies - man-made structures - land formations - fresh water bodies A:
(Answer)
fresh water bodies
Ques: Answer the following question given this paragraph: Weather occurs because of unequal heating of the atmosphere. The source of heat is the Sun. The general principles behind weather can be stated simply:. Q: What does unequal heating of the atmosphere cause? Choices: - water - flares - humidity - weather A:
Ans: weather
(Q).
Answer the following question given this paragraph: Groundwater erodes rock beneath the ground surface. Limestone is a carbonate and is most easily eroded. Q: Groundwater does what to the rock beneath the ground surface? Choices: - accelerates it - creates it - boosts it - erodes it A:
(A).
erodes it
Ques:Answer the following question given this paragraph: Elements are pure substances that make up all matter, so each one is given a unique name. The names of elements are also represented by unique one-, two-, or three- letter symbols. Q: Elements are pure substances that make up what? Choices: - some matter - Objects - Solids - all matter A:

Ans:all matter
Ques: Answer the following question given this paragraph: Organisms that live in a hypotonic environment such as freshwater, need a way to prevent their cells from taking in too much water by osmosis. A contractile vacuole is a type of vacuole that removes excess water from a cell. Freshwater protists, such as the paramecia shown in Figure below , have a contractile vacuole. The vacuole is surrounded by several canals, which absorb water by osmosis from the cytoplasm. After the canals fill with water, the water is pumped into the vacuole. When the vacuole is full, it pushes the water out of the cell through a pore. Other protists, such as members of the genus Amoeba , have contractile vacuoles that move to the surface of the cell when full and release the water into the environment. Q: Organisms that live in freshwater environments often possess a contractile vacuole that prevents cells from taking in too much water through what process? Choices: - electrolysis - glycolysis - hemostasis - osmosis A:
Ans:
osmosis