End of Year Science 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

True of False? When ice melts, the number of atoms remains the same.

• true

• False

Tags

NGSS.MS-PS1-4

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

Which best describes characteristics of a river basin?

• the land drained by a river and its tributaries

• the land formed when rivers create estuaries and marshes

• the land at the mouth of a river where water flows into the ocean

• the land formed as a result of a river flooding

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