Experimental Investigations Review

The independent variable is the factor in the experiment that we can change.

• True

• False

Tags

NGSS.MS-PS2-2

What is a constant?

• Part of the experiment the scientist changes or controls

• Part of the experiment that does not change

• Part of the experiment that reacts to the independent variable

• Base experiment that the scientist compares with other trials

What is the independent variable?

• The temperature

• The acid

• The fertilizer

• The soil

What is the control group?

• Group 1

• Group 2

Using the same model of piston, you test 4 different weights of oil to see which one will allow the piston to last the longest at 60 strokes a minute.

• Descriptive

  Investigation

• Comparative

  Investigation

• Experimental

  Investigation

Tags

NGSS.MS-ETS1-3

Match the following

• the variable the researcher changes OR the variable that the researcher is testing.

• manipulate

• larva

• dependent variable(s)

• change or adapt to suit one's purpose

• grub

• variables that are kept the same to make the results more meaningful

• independent variable

• variable that responds to the researcher's changes

• controlled variable(s)

Answer explanation

Be careful to read the vocabulary terms from the packet. If you made any mistakes and you don't understand why certain answers are wrong, see me!!

SpongeBob noticed that his favorite pants were not as clean as they used to be. His friend, Sandy, told him that he should try using Clean-O detergent, a new brand of laundry soap she found at Sail-Mart. SpongeBob made sure to wash one pair of pants in plain water and another pair in water with the Clean-O detergent. After washing both pairs of pants three times each, the pants washed in the Clean-O detergent appeared to be cleaner than the pants washed in plain water.

What is the dependent variable?

• Spongebob

• Cleanliness of pants

• Type of water

• Sandy

This is the factor that we keep the same for all trials in the experiment.

• Independent Variable

• Dependent Variable

• Constant

• Control

Christopher notices that his shower is covered in a strange green slime. His friend Kendall tells him that coconut juice will get rid of the green slime. Christopher decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. What is the independent variable?

• The shower

• The green slime

• Christopher

• The type of "treatment"

Tags

NGSS.MS-PS1-2

Christopher notices that his shower is covered in a strange green slime. His friend Kendall tells him that coconut juice will get rid of the green slime. Christopher decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower.

What is the control?

• The "treatment" with coconut juice

• The "treatment" with water

• Spongebob

• The green slime