5 L 3 3

The element sodium appears like this in the periodic table. Which is its chemical symbol?

• 11

• Na

• sodium

• 22.990

If a highly-reactive metal with one valence electron is discovered, in which group would the element best fit?

• group 1

• group 2

• group 17

• group 18

Which will most likely result if there is increased upwelling in a coastal area?

• more aquatic life

• less nutrients in the water

• higher water temperatures

• fewer nitrates

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which is the main source of dissolved oxygen in the ocean?

• underwater earthquakes

• decay of living organisms

• animals that live near the surface

• plants and algae that live near the surface

List the steps of the scientific method

d

e

f

c

b

a

Ask a question

Conduct experiment

Communicate results

Form a hypothesis

Analyze results

Draw conclusions

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

Which best describes the role humans play in the oxygen cycle?

• They combine oxygen with other elements.

• They breathe in oxygen and carbon dioxide from the atmosphere.

• They breathe in oxygen and convert it to carbon dioxide, which they breathe out into the atmosphere.

• They breathe in carbon dioxide and convert it into oxygen, which they breathe out into the atmosphere.

Which level of a food chain has the most energy?

• producers

• decomposers

• scavengers

• consumers

Tags

NGSS.MS-LS2-3

The diagram shows some organisms in an Antarctic food chain. Which BEST describes the role of krill in this food chain?

• producers

• decomposers

• primary consumers

• secondary consumers

Tags

NGSS.MS-LS2-3

Which of the following are needed for photosynthesis?

• Sunlight, water, carbon dioxide

• Glucose, oxygen

• Sunlight, water, oxygen

• Glucose, carbon dioxide

Tags

NGSS.MS-LS1-6