Scientific Investigations

How many variables does a controlled experiment contain?

• 1

• 2

• 3

• As many as you need

A factor that changes in an experiment is known as a(n) _______.

• Constant

• Variable
  

• Response

• Hypothesis

Tags

NGSS.MS-PS2-2

In his garden, Mica notices that plants in the shade do not grow as much as plants that receive direct sunlight. This is known as a(n)______.

• 1. Data

• 1. Scientific theory

• Observation

• Conclusion

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Lisa investigates the affect that environmental temperature has on the heartbeat of a human. Which of the following is the independent variable in her experiment?

• Heartbeat
  

• Temperature

• Sunlight

Rachel conducts an experiment to determine if increased UV radiation increases the number of freckles a person has. Which of the following is the dependent variable?

• UV radiation
  

• Freckles
  

• Amount of sunlight

• Wrinkles

Based on the data table shown, does a peppermint attract more

ants than a lifesaver?

• Peppermints attract more ants than lifesavers.

• Peppermints do not attract more ants than lifesavers.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Why must an experiment be repeated?

• to continue to make observations so their journal reports are thorough

• to ensure validity in the experiment, the results should be the same each time

• to continue to restate their question

Tags

NGSS.MS-PS2-2

Based on the data table shown, do vitamins increase the height of

monkeys?

• vitamins DO increase the height of monkeys

• vitamins DO NOT increase the height of monkeys

Tags

NGSS.MS-LS1-5

What purpose did the untreated cuttings serve in this experiment?

• independent variable

• dependent variable

• constant

• control group

Different objects are dropped from the same height and the time that it takes each object to fall is recorded in the data table below. Which of the following represents a constant in this experiment?

• throwing some objects and dropping others

• the height at which the object is dropped

• the object dropped

• the falling time