PHYS SCI Unit 4 Test Review

If Bismuth-250 has a half-life of 60.5 seconds, how many grams of the sample will be left after 121 seconds?

• 3.69 g

• 7.83 g

• 14.75 g

• 29.5 g

Tags

NGSS.HS-PS1-8

A fossil originally had 254 grams of carbon-14 but currently has 127 grams of carbon-14. The fossil is most likely...

• 5,730 years old

• 11,460 years old

• 17,190 years old

• 22,920 years old

The half-life of element X is 24,100 years. About how long would it take 504 g of element X to decay until there were only 63 grams of element X left?

• 24,100 years

• 48,200 years

• 72,300 years

• 96,400 years

Element T has a half-life of 6 hours. If a patient receives a dose of element T one morning, about what percentage of element T will be left in the patient's body 12 hours later?

• 6.25%

• 12.5%

• 25%

• 93.8%

Which best describes the molecular motion of the water particles as the burner supplies heat?

• the molecular motion will increase as less thermal energy is absorbed

• the molecular motion will increase as more thermal energy is absorbed

Tags

NGSS.MS-PS1-4

During an experiment, black pepper is added to the water as it boils strongly, and the pepper moves in circular patterns. What does the circular pattern of the pepper represent in terms of our oceans?

• the radiation of thermal energy being passed from the Sun into the ocean

• the evaporation of ocean water due to conduction of thermal energy

• the pressure of water pushing particulates to the bottom of the ocean

• the convection of ocean currents as warm water rises and cool water sinks

Tags

NGSS.MS-ESS2-6

What process is this passage describing?

• Conduction

• Convection

• Radiation

• Subduction

When thermal energy is added to an object the motion of the particles...

• decreases

• increases

• remains unchanged

• decreases, then increases

Tags

NGSS.MS-PS1-4

Someone sun-tanning at the beach receives thermal energy through...

• conduction

• radiation

• convection

• a combination of all three

Which BEST describes the way particles will move to heat objects using CONDUCTION?

• fast moving particles within warm objects collide with EM waves

• objects generate EM waves are carried away from the object emitting them

• fast moving particles collide with slower moving particles, transferring heat energy

• particles expand, with hot air rising and cold air sinking

Tags

NGSS.MS-PS1-4