Estimating Percentages Worksheet 1.

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Estimating Percentages - Worksheet 1

Which is Bigger? "Compare and Contrast"

1. Put the following squares in order from biggest (A) to smallest (E).

Answers:

A._______________

B._______________

C._______________

D._______________

E._______________

2. How many square number 2's will fit into square 3? _____

3. How many square number 2's will fit into square 4? _____

4. How many square number 2's will fit into square 1? _____

5. Which square will hold 9 square number 5's? _____

6. How many of the smallest square will fit into the biggest one? _____

Estimating Percentages - Worksheet 2

the "Square Meter Quadrat"

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Plant Key Code:

Yellow Coneflower

Indian Grass

Compass Plant

Big Bluestem Grass

Rosinweed

Bare Ground

The big square above is a "square meter quadrat" used to help measure the growth of natural areas. You carry the big square, or four meter sticks to make the square, out to the area you are going to study and place it on or over the plants you are sampling. You then estimate how much of the square is covered by each of the plants found there. Using the quadrat and the key, answer the following questions.

1. Which plant covers the most ground in the square?

2. Are there more plants than bare ground?

3. Does Yellow Coneflower take up more space than Rosinweed?

More than Compass Plant?

4. How does the amount of Big Bluestem Grass compare to the amount of Indian Grass?

Estimating Percentages - Worksheet 3

"What's Percentage?"

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1. How many little squares are there in the big square? ________

2. Find a fast way to figure out how many little squares there are?

Percent: There are 100 pennies in a dollar. One penny is one percent (1%) of a dollar. 50 pennies are 50 percent (50%) of a dollar. Percent means part of 100 equal pieces of something.

3. Each little square is equal to ______ percent of the big square because the big square is made up of ______ little squares.

4. Color any ten little squares. What percent of the big square did you color? _______

5. How many more times can you color ten little squares before the big square is all colored? _______

Estimating Percentages - Worksheet 4

Example Quadrat Analysis

Plant Key Code:	%:
Yellow Coneflower	_____%
Indian Grass	_____%
Compass Plant	_____%
Big Bluestem Grass	_____%
Rosinweed	_____%
Bare Ground	_____%

The square is an example of a prairie quadrat. The scientists roughly drew in the location of the plants in the square (quadrat). Fill in the table with an estimate of the percentages (%) for each plant. (Remember that the "Key" identifies the plants.)

1. Which plant is there the most of? _______________

2. Which plant is there the least of? _______________

3. Which plants are in nearly equal amounts? _______________________________

4. Which plant takes the largest single area? _________________

5. Find an easy and accurate way to measure the percentage of space each plant takes up in the quadrat?