Chemistry Practice Unit 1 Practice 1

A sports scientist is conducting a study to understand how different brands of soccer cleats affect a player's sprinting speed. Six different brands of cleats are tested and the time taken to sprint 100m is recorded. What is the INDEPENDENT variable?

• The brand of soccer cleat

• The sprinting time

• The 100 meter distance

• The soccer player

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

A test is set up to test which brand of soda creates the biggest foam explosion when adding a Mentos candy. Three different sodas were tested. They measured the height of the foam eruption. What is the DEPENDENT variable?

• Brand of soda

• Number of mentos candies used

• Height of foam eruption

• Temperature of soda

A series of steps used to provide more evidence to support or disapprove a hypothesis.

• scientific method

• recipe

• data collection

• metric system

Tags

NGSS.MS-PS1-2

Stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted is a(n) example of what step.

• Define the Problem

• Conduct an Experiment

• Form a Hypothesis

• Draw a Conclusion

Tags

NGSS.MS-LS1-5

The control group always lacks the

• Dependent Variable

• Independent Variable

• Constants

• Hypothesis

Identify the problem with this experiment:

A scientist thinks that flatworms swim faster if they are in salt water. So he drops them in salt water and finds that they do swim very fast. He concludes that salt water makes flatworms swim fast.

• No independent variable

• Too many independent variables

• No control group

• No quantitative data used

Why is this a invalid experiment?

• More than 1 Independent Variable

• No clear Dependent Variable

• Too many variables are held constant

• No constant variables

Tags

NGSS.MS-LS1-5

An experiment is conducted to test how different cleats change an athletes running speed. Six different types of cleats are tested and the 100m run time is recorded. What is the DEPENDENT variable?

• The type of cleat

• The run time

• The 100 meters

• The athlete

Tags

NGSS.MS-PS2-2

A sports scientist is conducting a study to understand how different brands of soccer cleats affect a player's sprinting speed. Six different brands of soccer cleats are tested and the time taken to sprint 100m is recorded. Which of the following are CONSTANTS in this experiment?

• The brand of soccer cleat

• The sprinting time

• The 100 meter distance

• The soccer player

A test is set up to test which brand of soda creates the biggest foam explosion when adding a Mentos candy. Three different sodas were tested. They measured the height of the foam eruption. What is the INDEPENDENT variable?

• Brand of soda

• Number of mentos candies used

• Height of foam eruption

• Temperature of soda