8th grade SOL review

Sea anemones are poisonous. However, the clownfish has developed an outer layer of mucus which provides protection from the stinging cells of the sea anemone. The mucus is best described as —

• an adaptation

• a relationship

• an energy requirement

• a social hierarchy

Tags

NGSS.MS-LS4-4

Hurricanes rarely form at higher latitudes because the water is too —

• warm

• deep

• shallow

• cold

On a small island, scientists observed and graphed changes in wolf and moose populations. From 1965 to 1970, which data pattern did scientists observe?

• A drop in wolf population and a drop in moose population

• An increase in wolf population and a drop in moose population

• A drop in wolf population and an increase in moose population

• An increase in wolf population and an increase in moose population

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A metal spoon was placed in a dish of ice cream and became cool. Which correctly describes the heat transfer process that resulted in the cooling of the spoon?

• Conduction, because the spoon was in contact with the cold ice cream

• Convection, because the spoon was in contact with the cold ice cream

• Conduction, because cold air currents affected the temperature of the spoon

• Convection, because cold air currents affected the temperature of the spoon

Students performed several trials using the laboratory setup shown. Students were also given this hypothesis: If friction increases, then the rolling distance of a marble will decrease. What should be changed to best test this hypothesis?

• Height of the ramp

• Height and length of the ramp

• Roughness of the ramp surface

• Height of the ramp and roughness of the ramp surface

Tags

NGSS.MS-PS2-2

A student recorded the temperature of an aquarium each hour for 8 hours. Which of these will best display the data the student collected?

• Bar graph

• Circle graph

• Picture graph

• Line graph

Which body of water is often protected naturally from storms by barrier islands and also contains a mixture of fresh water and salt water?

• Estuary

• Ocean

• Lake

• Pond

Conversion Table 1 km = 1,000 ? 1 m = 100 ? Which of these best completes the Conversion Table?

• 1 km = 1,000 mm; 1 m = 100 cm

• 1 km = 1,000 m; 1 m = 100 mm

• 1 km = 1,000 cm; 1 m = 100 mm

• 1 km = 1,000 m; 1 m = 100 cm

A student measured the power of a motor operating at different temperatures. The student recorded a total of 11 measurements, one at each 2 degree interval between 10°C and 30°C. Which change in the procedure would most improve the validity of conclusions based on this investigation?

• Increasing the number of variables

• Decreasing the range of the independent variable

• Repeating the experiment several times

• Producing a graph of numerical observations

Tags

NGSS.HS-PS1-5

Students placed steel wool in beakers of four different liquids in order of the most acidic to neutral. The students recorded their observations in the table. Which is the best conclusion based on the table?

• The more acidic the substance, the faster it reacts with steel wool.

• The more acidic the substance, the faster the steel wool turns to a gas.

• The less acidic the substance, the faster the steel wool becomes covered with air bubbles.

• The less acidic the substance, the faster the steel wool changes color.

Tags

NGSS.MS-PS1-2