Experimental Design

Forecasts about what may happen in future situations are

• conclusions

• predictions

• observations

• experiments

Tags

NGSS.MS-ESS3-2

What is the best explanation for why scientists complete the same experiments many times?

• to waste money & materials

• because they have nothing better to do

• to get different results each time

• to make sure the results can be trusted

3 Students are testing which method can melt an ice cube in a plastic bag the fastest. 1st Student=holds in hand

2nd Student=sits on it

3rd student leaves ice cube on desk

What is variable or factor that changes in this experiment?

• method used to melt ice

• number of ice cubs

• starting temperature of ice

• type of plastic bag

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Conclusions based on evidence about events that have already occurred are

• hypothesis

• observations

• experiments

• inferences

Alan and Monica tested how fertilizer X affected the growth of a plant. They put 100 grams of fertilizer X in pot 1 and O grams in pot 2. What is pot 2 called in science?

• data group

• observation group

• control group

• a test group

In science, which of the following can only be made using the senses of sight, sound, touch, taste, and smell?

• interpretations

• predictions

• observations

• conclusions

Tags

NGSS.MS-LS1-8

If you want to find the best resource to plan an investigation to see if you can make an electric current with a lemon, what would you use?

• an online encyclopedia

• a reference book on building electric circuits

• a website about citrus fruit

• life science textbook

Tags

NGSS.MS-ETS1-1

All factors that can change in an experiment are called variables. Which of the following is true about the variables in experiment?

• One variable should change and the others should be kept the same,

• One variable should be kept the same and at least 2 should change

• All variables should change

• All variables should be kept the same

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

If you are doing an experiment about the way 3 plants grow in different amounts of light, what is important to remember about observations?

• only observe one plant everyday

• observe at a different time everyday

• observe in the same way every time

• observe in a different way every time

Marvin experimented to find the effect of exercise on his body temperature. His steps are 1)Measure his temperature 2) Run in place 3 minutes 3) Drink a glass of water 4) Measure his temperature again Which step is not needed?

• 4

• 1

• 3

• 2