Scientific Investigations Make Up Quiz

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Question: Does the brand of dog food you feed a dog affect how much it defecates (poops)

1. Three black lab dogs were selected from the local shelter, the dogs were labeled "A", "B", and "C".
2. Dog A was given 1 cup of Science Diet dog food once a day at 6pm
3. Dog B was given 1 cup of Purina dog food once a day at 6 pm
4. Dog C was given 1 cup of Iams dog food once a day at 6 pm
5. Each dog was kept in an individual outdoor kennel in the same backyard
6. Feces (poop) was collected each day at feeding time
7. Feces (poop) was weighed daily for 2 weeks and the daily feces weight was recorded
8. Experiment was repeated three more times with different dogs

How could the validity of this investigation be improved? *

Check all that apply

Repeat the experiments two more times instead of three

Use the same breed of dog

Give each of the dogs 1 liter of water daily

Use a more accurate digital scale to weigh the feces (poop)

Repeat the experiment 5 times instead of 3 times

Use 6 dogs for the experiments instead of 3

Required

How could the reliability of this investigation be improved? *

Check all that apply

Repeat the experiments two more times instead of three

Repeat the experiment 5 times instead of 3 times

Give each of the dogs 1 liter of water daily

Use a more accurate digital scale to weigh the feces (poop)

Use 6 dogs for the experiments instead of 3

Use the same breed of dog

Required

In the investigation above, which of the following would be a(n) example(s) of responding variable(s)? *

Check all that apply

The weight of the feces (poop) that was collected

Al the dogs were fed once a day at the same time of day

The same breed of dog was used

Dogs were fed the same amount of food

All the dogs used were of the same weight before the investigation began

Each dog received the same amount of exercise each day

Different brands of dog food were given to each dog

Required

In the investigation above, which of the following would be a(n) example(s) of manipulated variable(s)? *

Check all that apply

The weight of the feces (poop) that was collected

Al the dogs were fed once a day at the same time of day

Different brands of dog food were given to each dog

Dogs were fed the same amount of food

The same breed of dog was used

All the dogs used were of the same weight before the investigation began

Each dog received the same amount of exercise each day

Required

In the investigation above, which of the following would be a(n) example(s) of controlled variable(s)? *

Check all that apply

Al the dogs were fed once a day at the same time of day

Different brands of dog food were given to each dog

Each dog received the same amount of exercise each day

All the dogs used were of the same weight before the investigation began

The same breed of dog was used

The weight of the feces (poop) that was collected

Dogs were fed the same amount of food

Required

Full Name: *

Class Period *

2nd Period

5th Period

6th Period

8th Period

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