Experimental Design

If you increase the temperature of the water, then the egg will cook faster.

IV:____________________ DV:____________________

• IV: Temperature of the water

  DV: Cooking speed of the egg

• IV: Cooking speed of the egg

  DV: Temperature of the water

• IV: Size of the egg

  DV: Temperature of the water

• IV: Temperature of the water

  DV: Size of the egg

An investigation was done to see if keeping the lights on for different amount of time each day affected the number of eggs the chicken lays.

IV:____________________ DV:____________________

• IV: Amount of time lights are on

  DV: Number of eggs laid by the chicken

• IV: Number of eggs laid by the chicken

  DV: Amount of time lights are on

• IV: Temperature of the room

  DV: Number of eggs laid by the chicken

• IV: Amount of food given

  DV: Number of eggs laid by the chicken

The time it takes to run a mile depends of the amount of exercise a person gets.

IV:____________________ DV:____________________

• IV: Amount of exercise

  DV: Time to run a mile

• IV: Time to run a mile

  DV: Amount of exercise

• IV: Distance of the mile

  DV: Amount of exercise

• IV: Weather conditions

  DV: Time to run a mile

Grass will grow taller if it is watered and fertilized more.

IV:____________________ DV:____________________

• IV: Watering and fertilizing

  DV: Height of grass

• IV: Amount of sunlight

  DV: Color of grass

• IV: Type of soil

  DV: Growth rate of grass

• IV: Temperature

  DV: Thickness of grass

An investigation was performed to see if corn seeds would sprout at different times depending on the temperature of the air in which they were placed.

IV:____________________ DV:____________________

• IV: Temperature of the air

  DV: Time taken for corn seeds to sprout

• IV: Time taken for corn seeds to sprout

  DV: Temperature of the air

• IV: Amount of water

  DV: Time taken for corn seeds to sprout

• IV: Type of corn seeds

  DV: Temperature of the air

If you sell more fertilizer, then there will be more algae growth in local lakes.

IV:____________________ DV:____________________

• IV: Number of sacks of fertilizer sold

  DV: Amount of algae growth in lakes

• IV: Amount of algae growth in lakes

  DV: Number of sacks of fertilizer sold

• IV: Temperature of the lake

  DV: Number of sacks of fertilizer sold

• IV: Amount of rainfall

  DV: Amount of algae growth in lakes

The amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead.

IV:____________________ DV:____________________

• IV: Amount of lead in gasoline

  DV: Amount of pollution produced by cars

• IV: Type of car

  DV: Amount of lead in gasoline

• IV: Amount of pollution produced by cars

  DV: Type of fuel used

• IV: Speed of the car

  DV: Amount of pollution produced by cars

Students in science class carried out an investigation in which a flashlight was pointed at a screen. They wanted to find out if the distance from the light to the screen had any affect on the size of the illuminated area.

IV:____________________ DV:____________________

• IV: Distance from the light to the screen

  DV: Size of the illuminated area

• IV: Size of the illuminated area

  DV: Distance from the light to the screen

• IV: Brightness of the flashlight

  DV: Size of the illuminated area

• IV: Color of the light

  DV: Size of the illuminated area

The score on the final test depended on the number of study questions the student completed.

IV:____________________ DV:____________________

• IV: number of study questions completed

  DV: score on the final test

• IV: score on the final test

  DV: number of study questions completed

• IV: time spent studying

  DV: score on the final test

• IV: number of classes attended

  DV: score on the final test

A study was done with white rats to see of the number of offspring born with birth defects was related to the number of minutes of exposure to x-rays by the mother rats.

IV:____________________ DV:____________________

• IV: Number of minutes of exposure to x-rays

  DV: Number of offspring born with birth defects

• IV: Number of offspring born with birth defects

  DV: Number of minutes of exposure to x-rays

• IV: Number of mother rats

  DV: Number of offspring born with birth defects

• IV: Number of offspring born with birth defects

  DV: Number of mother rats