1. Day 71 Which activity requires the use of safety goggles? A sampling a population of birds B measuring the temperature of soil C examining a cell under a microscope D mixing two chemicals to make a solution What would the width of the capillaries be when the temperature was 17.5? a. 6.0 b. 4.5 c. 4.8 What characteristic do these leaves have that allow them to expand their range quickly? a. the shape of the leaves b. the number of leaves c. the length of the branches.

2. Day 72 Which of the models below represents the molecule that contains genetic information? The length of a fetus is measured over time. Which of these would be the best way to display the information?

3. Day 73 A large tree fell in a dense forest. Several months later many new plants were growing in the area of the fallen tree. The new plant growth most likely occurred as a result of an increase in which factor? A the amount of available oxygen B the amount of available water C the amount of available sunlight D the amount of available carbon dioxide Which measurement range is the best estimate for the length of a pond microorganism’s body? F 0.002 – 0.2 millimeters G 0.002 – 0.2 milliliters H 2.0 – 200 millimeters J 2.0 – 200 milligrams Hint: measure in meters, liters, or grams? Hint? large or small? This sign warns people about which hazard? A sharp objects B infected tissues C radioactive materials D poisonous chemicals

4. Day 74 The alfalfa plant gets its nitrogen from bacteria that live in its roots. In return, the alfalfa provides food for the bacteria. Which term best describes the relationship between the alfalfa and the bacteria? F predation G mutualism H parasitism J competition Shown below are the steps a student will complete in order to study the effect light has on the number of microscopic algae in freshwater. 1. Place one jar of pond water in the sun and one in the shade for one week. 2. Use a microscope to count the number of microscopic algae in one milliliter from jar A and one milliliter from jar B. 3. Label two jars A and B. 4. Collect two jars of pond water. Which of these is the best order in which to do these steps? A 3 – 4 – 2 – 1 B 4 – 2 – 3 – 1 C 3 – 4 – 2 – 1 – 2 D 4 – 2 – 1 – 2 – 3 Hey! I like when you help me! The feeling is mutual!

5. Day 75 These organisms were found clinging to the bottoms of small rocks in a stream. Which unit would be most appropriate for measuring the length of these organisms? A millisecond B milliliter C millimeter D milligram

6. Day 76 To which order does Oklahoma’s state bird, the scissor-tailed flycatcher, belong?

7. Day 77 The drawings represent the lower jaws of four animals. Three of the animals have similar diets. Which drawing represents the animal with a different diet?

8. Day 78

9. Day 79 A student performed an activity using young plants. Test tubes containing the young plants were placed at different angles and labeled “Trial 1,” “Trial 2,” “Trial 3,” and “Control.” Which of these diagrams represents the one labeled “Control”?

10. Day 80