Science End of Year Review

When materials combine to form new compounds it is a chemical change. Which example is a chemical change?

• baking powder fizzing

• water boiling

• ice melting

• sugar cube dissolving

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When a solute is dissolved in a solvent creating a clear liquid, is this chemical or physical?

• chemical

• neither chemical nor physical

• physical

• it depends

When a new material is formed, this is a sign that a ___________ change has taken place.

• chemical

• physical

• scientific

• temporary

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If a plastic toy has a mass of 100g and a volume of 10mL, what is its density?

• 10 g/mL

• .01 g/mL

• 100 g/mL

• you would need more information

Why is water from an aquifer more likely to be cleaner than water from other sources?

• because it forms where fresh and salt water meet

• it receives water directly from precipitation

• it rises to the surface near the ocean

• pollutants are filtered by rock and soil deep within earth

Which groundwater contaminant contained in fertilizers and pesticides comes from farms?

• bacteria

• mercury

• nitrates

• sodium

Which of the following is a bio-indicator?

• current

• insect

• rock

• water

Which is a career that would use microorganisms to remove pollutants from water?

• medical specialist

• DNA fingerprint specialist

• Environmental Protection Agency specialist

• Center for Disease Control

Which use of biotechnology most benefits North Carolina agriculture?

• producing human vaccines

• producing disease resistant crops

• producing new medicines from bacteria

• producing enzymes to eliminate pollutants

Tags

NGSS.MS-LS4-4

Which of the following is NOT an alternative energy source?

• fossil fuels

• geothermal

• hydroelectric

• wind 

Tags

NGSS.HS-ESS3-1