1. Day 61 As nocturnal animals, opossums are most active at night. Which graph accurately shows the use of glucose, a food molecule used in respiration, by an opossum’s muscle cells over a two-day period? A or B? Nocturnal animals are animals that are more active at night. What process is shown by the letter X in the diagram? a. evaporation b. condensation c. precipitation

2. Day 62 In an ecosystem, energy from the sun is converted and transferred to all members of the biotic community. At which level of organization is solar energy converted by photosynthesis? a. cells b. organisms c. populations When did the bacteria reach the carrying capacity of its environment? a. 0 hours b. 10 hours c. 20 hours

3. Day 63 What type of organism is primarily responsible for recycling matter from mountain lions’ bodies back to the soil? a. herbivores b. omnivores c. decomposers All elements in an ecosystem can be classified as biotic or abiotic. Which statement uses the term “biotic” or “abiotic” correctly? a. Biotic factors in a river include flow rate and water depth. b. Abiotic factors in a grassland include cattle grazing and predation. c. Abiotic factors in a corn field include rainfall and soil temperature.

4. Day 64 1.Which level has the smallest number of organisms? 2.Which level has the largest number of organisms? 3.Which level receives the highest percentage of energy from the sun? 4.Suppose there are 10,000 units of energy available at the lowest level. How much energy would be at the top level?

5. Day 65 Identify the biotic and abiotic components in the diagram. Hint: biotic abiotic bio means life a- means “not” Identify the type of ecosystem in the diagram below. a. aquatic b. terrestial

6. Day 66 Which would be used to measure the length of oak leaves? Which would be used to compare the mass of the two boxes above?

7. Day 67 Which of these tools would be most appropriate to use when measuring the width of each growth ring in a tree trunk? A balance B ruler C stopwatch D thermometer Which unit would be best to express the mass of the asteroid? A mg B g C cg D kg

8. Day 68 Which would most likely be measured in milliliters? A amount of rainfall in a month B length of time of a rainstorm C temperature of rain D mass of a raindrop Sandy grows roses along her walkway. The roses close to the street had more blooms than the roses close to the house. Which statement is a hypothesis Sandy could make about her roses? a.There were many bloom on the roses near the house and fewer blooms on the roses closest to the street. b.The roses closest to the street had more blooms because they received more sunlight. c.The Roses near the house were taller but had fewer blooms.

9. Day 69 Which of these is used to measure mass? What is the length of this tadpole? a. 2.8cm b. 3.1cm c. 3.5cm

10. Day 70 Bright and colorful markings can be warnings to other organisms to stay away. Which of these fish is likely to be most dangerous to its predators? Which of the seeds above is most likely to be carried by an animal? a. maple b. milkweed c. dandelion d. cocklebur