Science EOG

A student is asked to categorize the following items as elements, compounds, or mixtures: copper wire, salt, aluminum foil, baking soda, a piece of granite, and sugar water. He lists ELEMENTS as copper wire, aluminum foil, and baking soda; COMPOUNDS as salt; MIXTURES as the piece of granite. Which is in the wrong category?

• copper wire

• baking soda

• sugar water

• salt

A student is designing an experiment for the science fair.  She needs to find a material that conducts an electric current, and her teacher has provided her with samples of the following elements.  Which of them should she choose?

• argon

• fluorine

• copper

• phosphorous

Which is an example of a chemical reaction?

• a pot of water boiling

• an iron nail rusting

• a piece of ice melting

• a sugar cube dissolving in tea

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A scientist recognizes a white powder as sugar due to its white crystals and its sweet taste. However, the scientist notices that the elements that make up the sugar - carbon, hydrogen, and oxygen - look nothing like sugar, nor are they sweet. What is the best explanation for this?

• Sugar is a compound, and compounds usually have a different appear

• Sugar is an element, so its properties are unique.

• Sugar is a heterogeneous mixture, so its appearance is unique.

• Substances in nature change randomly and it is impossible to predict those changes.

Tags

NGSS.MS-PS1-1

Which example BEST represents an interconnection between an aquatic food web and a terrestrial food web?

• Fish eat insects that land on the surface of a pond.

• Snakes eat bird eggs.

• Bats eat mosquitos.

• Mountain lions catch and eat deer.

Tags

NGSS.MS-LS2-2

Where is the majority of Earth's freshwater located?

• clouds

• Pacific Ocean

• polar ice caps

• rivers

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

• 5 grams

• 15 grams

• 10 grams

• 50 grams

Tags

NGSS.MS-PS1-5

How can a scientist, using the periodic table, find an element with properties similar to another element?

• by comparing density

• by finding its periodic group

• by comparing malleability

• by comparing atomic weight

Which is an example of a physical change?

• boiling

• burning

• rotting

• rusting

Tags

NGSS.MS-PS1-4

Which project is MOST LIKELY to interest a scientist working at a biotechnology company?

• study and reconstruction of fossilized bones

• conservation of key species within ecosystems

• development of genetically modified corn plants

• prevention of sewage leaking into water supplies

Tags

NGSS.MS-LS4-5