S1 Review

Personal Protective Equipment (PPE) is important in a lab. Which of these is NOT PPE?

• A pair of goggles

• A lab apron

• The safety shower

• A pair of gloves

Oh no! A couple of drops of a nasty chemical got onto your arm in a lab. What should you do AFTER telling the teacher?

• Wash it in the sink with soap.

• Wash it in the sink without soap.

• Stop, drop, and roll!

• Run to the safety shower.

TRUE or FALSE: Hot metal/glass can look the same as cold metal/glass.

• TRUE

• FALSE

The Second Law of Thermodynamics states...

• Two objects in thermal equilibrium with a third object are also in thermal equilibrium with each other.

• Energy is never created or destroyed, only transformed.

• Processes only happen naturally if the chaos across the universe increases.

• The only matter with zero entropy would be a flawless crystal at 0 Kelvins.

Tags

NGSS.HS-PS3-4

Which of these decreases entropy?

• Water boiling

• Mercury evaporating

• Molten metal freezing

• Plastic melting

When water freezes...

• Water molecules slow down and cluster together.

• Water molecules speed up and cluster together.

• Water molecules slow down and spread out.

• Water molecules speed up and spread out.

Tags

NGSS.MS-PS1-4

How many sigfigs in the number 2806.030?

• 4

• 5

• 6

• 7

How many sigfigs in the decimal .0030?

• 1

• 2

• 3

• 4

USING SIGFIGS, 25 x 100 = ?

• 2000

• 2500

• 3000

• 25100

The scientific notation term 3.48 x 10^6 is really...

• .000000348

• .00000348

• 348000000

• 3480000