PS 3 L1-3

What shows the chemical symbol for an element surrounded by dots representing the electrons in the outer energy level?

• a chemical fromula

• a compound formula

• an electron-dot diagram

• a chemical bond

I identify the Complex Crater on the picture

• A

• B

• C

• D

146mm = _____________ dm

• 1.46

• 146

• 14.6

• .0146

Electron dot diagrams contain the chemical symbol for an element surrounded by dots representing the ____________________ electrons—the electrons in the outer energy level.

In a water molecule, hydrogen contributes one electron and oxygen the other in each hydrogen-oxygen bond. The oxygen atom needs 2 additional electrons to be stable, so it shares with ______ hydrogen atoms.

I identify the Ghost Crater on the picture

• A

• B

• C

• D

How do currents affect where debris washes ashore during a beach cleanup organized by Priya and her friends?

• They have no effect

• They can carry debris from far away

• They only affect local debris

• They clean the beaches

During a science class, Mia asked her classmates about microplastics. She explained that these are tiny pieces of plastic that can be found in oceans and rivers. What are microplastics?

• Large plastic items

• Plastics that are biodegradable

• Plastic pieces smaller than 5mm

• Plastic items made from natural materials

56.7 m = _____________ cm

• .5670

• 5.67

• 56.7

• 5670

What can happen to animals like Luna's pet fish that ingest microplastics?

• They become healthier

• They may have developmental issues

• They can digest them easily

• They are unaffected