A student prepared a slide of onion epidermis to observe under a microscope. Two of the slides she prepared are shown in Figure 3.

0

3.1

Describe what is wrong with slide A.

Suggest how this problem can be avoided.

3 . 2

Describe what is wrong with slide B.

Suggest how this problem could be corrected.

3.3

When observing a slide under the microscope you must first use the lowest power objective lens.

Explain why this is important.

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.