Semester test IB

Stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted.

• recognize a problem
• test the hypothesis with an experiment
• form a hypothesis
• draw conclusions  

Tags

NGSS.MS-LS1-5

Arjulia soaked six different kinds of seeds in water for 24 hours.  Then she planted the seeds in soil at a depth of 1 cm.  She used the same amount of water, light, and heat for each kind of seed.

• recognize a problem
• test the hypothesis with an experiment
• form a hypothesis
• draw conclusions

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertalizers, equal light, and equal water. What type of variable is the water?

• Dependent
• Independent
• Control

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control

Tags

NGSS.MS-ETS1-1

In an experiment to determine what type of acid is the MOST corrosive (destructive) which of these would NEED to be a controlled variable?

• The acids used
• The material the acid is poured on
• The size of the hole created by the acid

If you were running an experiment to determine the temperature at which beans sprout the fastest, what would be the variable?

• The number of beans you plant
• The height of the sprouts you grow
• The amount of water you give the beans
• The temperature at which each bean is kept

A student hypothesized that robins prefer large birdhouses to small ones. He build four birdhouses of different sizes to test his hypothesis. What was the independent variable in the students study?

• The size of the birdhouse
• The number of birds in the house
• The location of the birdhouse
• The season of the year

To determine the effects of a new drug on memory, one group is given a pill that contains the drug. A second group is given a sugar pill that does not contain the drug. This second group constitutes the

• random sample
• experimental group
• control group
• test group

It is January, and Haley and Sarah are tired of cold feet.  They decide to design and experiment looking at the effectiveness of wool versus cotton versus nylon as insulators.  They fill identical water bottles with 100⁰F water and put them in each different type of  sock, and measure the temperature every 20 mins.  What is the independent variable being measured. 

• Water Temperature
• Type of sock used
• Amount of water
• Month of the year

Sara wants to see whether drinking coffee will improve productivity. What is the INDEPENDENT variable (cause) in this research?

• Increase in productivity

• Brand of Coffee

• Whether the participant had coffee or not

• The times the participant had coffee