TNReady Science

A seaside community decides to build a barrier to reduce erosion and other damage to the beach ecosystem. The barrier needs to be able to withstand harsh winter winds and strong spring storms. Winds in the area usually produce a force between 3 and 10 newtons. Community leaders evaluate their options based on the strength and the cost of each barrier material and how often each material will need to be repaired or replaced.

Which material will be the best choice for building the barrier?

• Natural Rock

• Wood

• Steel

• Concrete

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Engineers have designed a hydrogen fuel cell car which is powered by the energy that is released when hydrogen and oxygen combine. To do this, the car's engine transforms chemical energy into mechanical energy. The only substance released from these cars is water vapor. A student claims that cars powered by this type of fuel have an advantage over cars powered by gasoline. Which statement supports the student's claim?

• Hydrogen fuel cell cars do not contribute to air pollution because their only exhaust is water.

• Hydrogen fuel cell cars do not require maintenance like gasoline powered cars do.

• Hydrogen fuel cell cars use non-renewable energy sources.

• Hydrogen fuel cell cars can be designed in a variety of shapes.

Tags

NGSS.MS-ESS3-4

The graph shows the number of native species present in a location over a 6-year period of time. The most likely reason for the change in native species from 2005 to 2009 is

• a struggle for resources.

• an increase in food availability.

• a decrease in predators.

• a change in the soil composition.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

When do you need to wear goggles?

• if you are measuring the length of a string

• if you are weighing a book

• when you are using chemicals

• if you are finding the volume of an object

Tags

NGSS.MS-PS1-2

Which of the following IS NOT SAFE?

•  measuring the length of a string

•  weighing a book

• going to a lab station without permission

•  finding the volume of an object

What do you need to wear to protect yourself from chemical splashes and other dangerous objects?

• goggles

• goggles and apron

• apron

All chemical wastes after an experiment should be...

• dumped in the sink.

• disposed according to your teachers instructions.

• taken home.

• left for someone else to clean up.

Tags

NGSS.MS-ESS3-3

What should you do if you get chemicals in your eyes?

• clean up the mess

• call 9-1-1

• immediately go to the eyewash station & tell your teacher

• rub your eyes

Which of the following should not be worn during a laboratory activity?

• dangling jewelry

• loose clothing

• sandals

• All of the above

Before you begin a lab, you should always...

• read all the directions

• if you have questions, ask the teacher

• make sure you have all the lab materials you need

• All of these answers