Graphing and Microscopes Obj 25 I can identify

Graphing and Microscopes

Obj 25: I can identify the parts of a Graph 3. Y axis label – Dependent variable 4. X & Y axis scales 1. Title 5. Data points 2. X-axis label – independent

Objective 26: I can choose the appropriate graph to create based on my data. There are 3 main types of graphs Bar Graph This type of graph is used when you are COMPARING 2 or more things. Line Graph This type of graph is used to show A CHANGE OVER A PERIOD OF TIME Circle Graph or Pie Chart This type of graph is used to show parts of a whole it is usually expressed in

Bar Graphs – Compare 2 or more things Ice Cream Type # of Votes Cherry 7 Vanilla 3 Chocolate 7 Mango 5 Peacan 3 Berry 6

Circle Graph or Pie Chart: Show parts of a whole – all parts have to add up to 100%

Line Graphs – show a change over A PERIOD OF TIME Period of

Graphing more than one set of data on the same graph. Points from different lines CAN SHARE THE SAME EXACT LOCATION A key to tell the lines apart

Obj 27: I can describe what is happening based on the shapes of the graph The graph shows an object which is not moving (at rest). The distance stays the same as time goes by because it is not moving.

The graph shows that the objects distance increases as time passes. The object is moving and so it has velocity. The straight line shows it is a constant (not changing).

Just like the previous graph, this graph shows an object moving with constant velocity

The curve in the graph shows that the objects velocity is changing as time passes. This is acceleration.

In the first part of the graph the object is moving with constant velocity. In the second part of the graph the object is at rest (not moving). In the third part the object is again moving with constant velocity.

Johnny’s mother brought him to school and then came back home for 3 hours. Then she went to the store for 2 hours which was on her way to Johnny’s school. After she was done shopping she continued to Johnny’s school to pick him up and then went back home for the rest of the day.

Microscope s:

Objective 28: I can identify the parts of a microscope

Ocular lens (Eyepiece) Body Tube Nosepiece Arm Objectives Stage Clips Coarse Adjustment Diaphragm Light Fine Adjustment Base Always carry a microscope with one hand holding the arm and one hand under the base.

Carrying a Microscope A B

Obj 29: I can follow the steps to use a microscope correctly 1. Always observe using the LOWEST POWER objective first. 2. Focus using the COARSE ADJUSTMENT KNOB to bring the object into focus. Bring the object into sharp focus by using the fine adjustment knob. This is ONLY USED ON LOW AND MED POWER 3. Focus, and then move to a higher power objective, if needed. 4. Use only the FINE ADJUSTMENT KNOB when using the HIGHEST (longest) POWER OBJECTIVE. 5. Keep both eyes open to reduce eyestrain. 6. Determine total magnification of the object by multiplying the power of the ocular (10 x) the power by the power of the objective.

Obj 30: I can calculate the total power of each objective lens on the microscope To calculate the power of magnification, multiply the power of the ocular lens by the power of the objective. What are the powers of magnification for each of the objectives we have on our microscopes? Total Magnification of Each power LOW Eyepiece 10 x x low power 4 x = MED Eyepiece 10 x x med power 10 x = HIGH Eyepiece 10 x x high power 40 x =

Comparing Powers of Magnification We can see better details with higher the powers of magnification, but we cannot see as much of the image. Which of these images would be viewed at a higher power of magnification?

Objective 31: I can describe the steps to making a wet mount slide. 1 – Get a clean slide and coverslip from your teacher. 2 – Place ONE drop of water in the middle of the slide over your specimen. Don’t use too much or the water will run off the edge and make a mess! 3 – Place the edge of the cover slip on one side of the water drop. Cover Slip Lower slowly 5 – Place the slide on the stage and view it first with the red-banded objective. Once you see the image, you can rotate the nosepiece to view the slide with the different objectives. You do not need to use the stage clips when viewing wet-mount slides!

Storing The Microscope • Return the lowest power objective in place • Wrap the cord around the base • Return dustcover