Scientific Investigation

Experiments are only conducted once and by one group to make the scientific process very fast.

• True

• False

Tags

NGSS.MS-PS1-2

Choose the correctly written hypothesis for "What is the effect of putting Pam Cooking Spray on the bottom of a sled?"

• I think the sled will slide faster.

• If I put Pam Cooking Spray on the bottom of my sled, then I will win the race.

• If I put Pam Cooking Spray on the bottom of my sled, then I will slide faster.

Tags

NGSS.MS-PS2-2

Which step in the scientific method comes after writing the hypothesis?

• Test hypothesis

• Ask Questions

• Draw Conclusions

• Share Results

a prediction that can be tested.

• constant

• variable

• hypothesis

• dependent variable

One chicken is injected with a growth hormone while another chicken is not injected with a growth hormone. After one year, both chickens are weighed. What is the dependent variable?

• If the chicken was injected with a growth hormone or not

• The weight of the chicken

• The type of chicken

Tags

NGSS.MS-LS1-5

Matt wants to test which liquid freezes first: Pepsi, milk, or apple juice.  He poured 50 mL of each into separate glasses and placed them in his freezer.  Every ten minutes, he checked his freezer and recorded his observations.  Pepsi froze first, followed by apple juice and then milk.  What is his dependent variable?

• type of liquid

• length of time until frozen

• amount of liquid

• location of freezer

Betty wants to test which type of phone has the longest battery life.  She is comparing iPhone 6 Plus, Samsung S5,  and a Droid.  She bought each phone new and charged them completely to 100%.  Then, she turned each phone on and timed how long until the battery ran out.  What is the independent variable in her experiment?

• brand of phone

• time until battery ran out

• time it took to charge to 100%

• outlet used for charging

Tags

NGSS.MS-ETS1-3

NGSS.MS-PS3-4

A bug repellent was sprayed on one arm. On the other arm, the bug repellent was not sprayed. After 2 hours, the number of bug bites are recorded. What is the independent variable?

• The type of bug repellent

• If an arm was sprayed with bug repellent or not

• The number of bug bites

The one factor that a scientist changes during an experiment. (It affects the results of the experiment).

• Controlled Variable

• Dependent Variable

• Independent Variable

Tags

NGSS.MS-PS2-2

Sabrina wants to test which brand of popcorn pops the most kernels.  She picked a store brand, Orville Redenbacher, and PopSecret.  All three bags started with the same number of kernels.  She popped each for 3 minutes in the same microwave, and then counted the number of kernels left over.  What is her independent variable?

• Number of kernels left over

• Brand of popcorn

• number of kernels before popping

• length of time cooking