Environmental Science Exam 1 -Continued 10._ In our everyday conversation we oft
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Environmental Science Exam 1 -Continued 10._ In our everyday conversation we often talk about "work." But scientists have a more preci ise meaning for the term. In which of the following activities are you doing "work" in its scientific meaning? (A) sitting on a rock (B) pushing against a rock that does not move (C) pushing the rock over a cliff (D) all of these B Heat is produced by radiant energy (A) when it travels through space strikes matter (C) when it is reflected from the Earth's surface (D) all of these. when it 11. 12. Which of the following is/are dependent on radiant energy for its/their production? (A) ol (B) wind (C) moving water (D) all of these (A) density (B) volume A kilogram of cotton and a kilogram of lead have the same (C) weight (D) all of these. 13 14. In the experiment with density which you conducted for Part 1, the data you collected was an example of (A) qualitative data involving description (B) quantitative data involving measurement (C) use of a control (D) use of variables Oil (A) floats on top of water because it is less dense than water (B) floats on top of water because it is more dense than water (C) submerges under water because it is less dense than water (D) submerges under water because it is more dense than water 15. 16. Oil spills in large bodies of water (A) have little effect on water organisms (B) only affect life at the bottom of the water (C) can severely affect the waterfowl and other organisms living on the surface of the water (D) are not affected by tides. 17.Due to the tilt of the Earth's axis, which of the following occurs? (A) the length of daylight and night varies throughout the year (B) the slant of the sun's rays vary throughout the year (C) the amount of the sun's energy reaching the Earth varies throughout the year (D) all of these. 18. In the experiment with direct and indirect light you conducted for Part 1, the surface area of the angled light was (A) less than the surface area of the light shone directly down (B) greater than the surface area of the light shone directly down (C) the same size as the surface area of the light shone directly down. 19.-?-During winter, the sun's rays strike (A) at more of a slant than during the summer (B) at less of a slant than during summer (C) perpendicular to the Earth. 20 On December 21", what season is Alice Springs, a city in the Northern territory of Australia, experiencing? (A) the beginning of summer (B) the beginning of winter (C) the beginning of autumn (D) the beginning of spring. I On June 21", what season is Portland, Oregon, a city in the northwest region of the 21 United States, experiencing? (A) the beginning of winter (B) the beginning of spring (C) the beginning of summer (D) the beginning of autumn (more 36Explanation / Answer
10.
As per the scientific definition of work it is said that the work is done when a force acts on a body and due to this application of force the body also gets displaced. Now if we see the options we find that in “A”and “B” there is no displacement of body while in “C” there is a displacement and hence option (C) is correct.
11.
Radiant energy is only acquired when it strikes a body as radiation don’t need any medium to travel and hence the energy can only be used up when this radiation strikes any body and hence option (B) is correct.
12.
Wind is produced when the radiant energy of sun strikes the surface of the earth and thus heats the surface due to this the air near to the surface heats up and rises while the cooler and denser air takes the place of this air and hence we’ll get a convection current of air in the atmosphere known as wind and hence we need radiant energy for this apart from this water which is also a liquid have the same convection current developed in it which is the cause of it’s movement and hence (B) and (C) is correct answer.
13.
One kilogram of cotton and lead will take up different space to occupy and hence will have different volume and since the density of a substance depends upon its volume therefore the density would also be different but since the weight which is represented in kilograms is similar for both lead and cotton therefore weight would be the correct answer or (C) is correct.
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