Review for Unit 1 Test Biology Antkowiak

Students are growing plants in the dark or in the light to see which grows better.  They put 3 seeds in the dark and 5 seeds in the light because they know seeds are more likely to dry out in the light. 
How could this experiment be improved?

• Put all plants in the light.
• Put all plants in the dark (where they sprout better)
• Put the same number of seeds in each container.
• put all the plants in the light so they grow better

Students are growing plants in the dark or in the light to see which grows better.  They put 3 seeds in the dark and 5 seeds in the light because they know seeds are more likely to dry out in the light. 
How could this experiment be improved?

• Put all plants in the light.
• Put all plants in the dark (where they sprout better)
• Put the same number of seeds in each container.
• put all the plants in the light so they grow better

Students are growing plants in the dark or in the light to see which grows better.  They put 3 seeds in the dark and 5 seeds in the light because they know seeds are more likely to dry out in the light. 
How could this experiment be improved?

• Put all plants in the light.
• Put all plants in the dark (where they sprout better)
• Put the same number of seeds in each container.
• put all the plants in the light so they grow better

In order for the conclusion of a scientific experiment to be convincing, the researcher must report adequate evidence supporting or refuting the hypothesis.  Scientific evidence should include the 

•  results from an experiment with just one trial 
• results from only the trials that produced the expected results (the other "bad" data should be thrown out!) 
• Results from multiple trials of one experiment, including unexpected results
•  results from multiple different types of experiments, including unexpected results

Maria wants to know if birds prefer to eat in one place over another. She makes three feeders out of 2-liter bottles and paints all of them red. She fills each of the feeders with the same amount of mixed birdseed, and plans to keep the feeders out for 10 days before measuring how much seed is eaten from each feeder. She puts each of the feeders in her back yard: one feeder in a large dead tree, another feeder she sits on the dog house, and the last she sits in a small bushy tree.
What is the dependent variable?

• Length of the birdfeeders
• Amount of time feeders are outside
• Amount of seed eaten
• Location the feeders are put in.

Three baseball players investigate to see who can throw a baseball the farthest. They mark off an area on the playground for their investigation. Which should they keep constant?

• height of the players
• color of the balls thrown
• order in which the players throw
• spot from which the players throw

If you were testing how well different dish soap cleaned grease, the independent (experimental) variable would be the:

• Dishes
• Water
• Dish Soap
• Types of Grease

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Changeable elements of an experiment which can affect the outcome of the experiment if not carefully controlled are called:

• placebos
• variables
• quantitative elements
• control groups

Tags

NGSS.MS-PS2-2

The number of variables that should be allowed to change in a well designed, controlled experiment is: 

• none
• 1
• 2 or more
• dependent on the type of experiment

Tags

NGSS.MS-PS2-2

In an experiment, this is what you COMPARE your experimental data to so that you can see if anything changed (our time WITH thumbs):

• control
• constants
• problem
• independent variable

Tags

NGSS.MS-PS1-2