Read the following paragraph, then answer the questions below. Put your answers on the scantron sheet. Mr. C was curious how an increase in water temperature would affect the survival rate of young fish.Mr.. C filled 4 tanks each with 25 gallons of water, and placed 50 yellow perch of various lengths in eachtank. Mr. C changed the water temperature between each tank by 2 degrees. Mr. C also placed 5 grams offish food every other day for 4 weeks in each tank.1. What question was Mr. C trying to find an answer to? A. How does the amount of water affect yellow perch survival? B. How does the amount of food affect yellow perch survival? C. How does water temperature affect yellow perch growth? D. How does water temperature affect how many yellow perch survive?2. What is the dependent variable that Mr. C is working with for this experiment? A. Amount of food B. Water temperature C. Survival of yellow perch D. Growth rate of yellow perch3. During this experiment Mr. C was testing the following hypothesis: If the temperature of water increases, then the survival rate of yellow perch will decrease. Although Mr. C developed a good hypothesis, why is his experiment considered to be invalid? A. Mr. C did not have a good experimental question B. Mr. C did not start the experiment with equal sized fish. C. Mr. C manipulated the water temperature. D. Mr. C controlled the amount of water and the amount of food placed in each tank.4. Observe Diagram A. Identify a good qualitative observation. A. The person is happy B. The person is smiling C. The person feels sick D. The person discovered an object in space.5. Observe Diagram A. Identify a good quantitative observations. A. The person has dark colored shoes B. The person is young C. The telescope has 3 legs D. The person discovered an object in space. Diagram A6. What on our observations of Diagram A, what can we infer from the picture? A. The person is smiling B. The person is looking at the moon C. The telescope has 3 legs D. The person has 2 legs
For 7-8 Read the given hypotheses and identify the Independent and Dependent Variables.7. If boys eat more salt then they will get better grades. A. Independent: Boys Dependent: Salt B. Independent: Salt Dependent: Boys C. Independent: amount of salt Dependent: better grades D. Independent: better grades Dependent: amount of salt8. If the temperature of the Sun decreases, then the temperature of the Earth will increase. A. Independent: temperature of the Sun Dependent: temperature of the Earth B. Independent: the Earth Dependent: the Sun C. Independent: the Sun Dependent: the Earth D. Independent: temperature of the Earth Dependent: temperature of the SunRead the following paragraph, then answer the questions below:Three weeks ago Bob observed a large number of worms on his driveway and across his lawn.Since that day, however, Bob hasn’t seen one worm. Since his initial observation, Bob remem-bers mowing the lawn three times, and fertilizing the grass once. Bob also remembered seeing anumber of birds visiting his lawn during this three week period. Bob would like to know why thepopulation of worms has dramatically decreased over the past three weeks.9. Which inference best supports the observations that Bob made about worms? A. Bob mowed his lawn three times. B. Bob wonders why the population of worms has decreased over the past three weeks. C. A heavy rain washed away the worms in Bobs lawn. D. The birds visiting Bob’s lawn have eaten many of the worms.10. Bob hypothesizes that adding fertilizer to the lawn decreases the number of worms. If Bobwere to test this hypothesis, what variables would he need to control during the experiment? A. The number of worms B. The mowing of the lawn, and birds entering the lawn area. C. The amount of fertilizer added to the lawn D. The number of worms, and the fertilizer added to the lawn.11. For the hypothesis developed from question 10, what is Bob’s manipulative and respondingvariables? A. Manipulative= amount of fertilizer, Responding= number of worms. B. Manipulative= number of worms, Responding= amount of fertilizer. C. Manipulative= number of birds, Responding= number of worms. D. Manipulative= amount of lawn, Responding= amount of fertilizer.12. As a part of the experiment, Bob decides to measure the amount of worms collected. Ratherthan counting each individual worm, Bob decides to throw all of the worms into a bucket andmeasure their mass. Which tool will allow Bob to successfully measure the worms mass? A. A graduated cylinder B. A meter stick C. A 100 gram mass D. A balance.
Read the following paragraph, then answer the questions below: George was curious how an increase in water temperature would affect the growthrate of gold fish. George filled 4 tanks each with 5 gallons of water, and placed 1 gold fishin each tank. George changed the water temperature between each tank by 2 degrees.George also fed each fish 5 grams of fish food every other day for 4 weeks.13. What question was George trying to find an answer to? A. How does the amount of water affect gold fish growth? B. How does the amount of food affect gold fish growth? C. How does water temperature affect gold fish growth? D. How does water temperature affect how much food a gold fish will eat?14. What is the dependent variable that George is working with for this experiment? A. Amount of food B. Water temperature C. Amount of water D. Growth rate of gold fish15. Which variables did George control during his experiment? A. Amount of food, water temperature, amount of water, number of fish per tank B. Amount of food, growth rate of fish, amount of water. C. Amount of water, amount of food, number of fish per tank. D. Water Temperature16. Each beaker contains 100 ml of water and 20 grams of sugar. Each beaker is stirred 10 times, but the water is heated to various temperatures. What is the best hypothesis for this experiment?A. If a sugar solution is stirred, it will dissolve more quickly.B. The hotter the sugar solution is, the faster the sugar will dissolve.C. How does temperature affect how quickly sugar dissolves?D. If a sugar solution is stirred and heated, then it will dissolve faster.
17. The picture at the right shows a piece of scientific equipment. What is it’s name and what is it used to measure?A. Those are beakers and they are used to measure volume.B. Those are graduated cylinders and they are used to measure volume.C. Those are graduated cylinders and they are used to measure mass.D. Those are beakers and they are usedto measure mass.18. In the data table above, what is the independent variable?A. Number of Ants on FoodB. Type of FoodC. No FoodD. None of the above
For Questions 19-25 Use the picture at the right. Mark A for Qualitative Observation Mark B for Inference Mark C for Quantitative Observation19. There are two sets of tracks.20. The larger animal killed the smaller animal.21. In the middle of the picture, the tracks over- lap each other.22. There was a fight between a large animal and a small animal in the middle of the pic- ture.23. There is only one animal’s tracks walking away from the middle of the picture.24. The larger animal began to run to get to the smaller animal.25. The larger tracks are darker than thesmaller tracks.