A scientist is studying a host-parasite relationship in a freshwater pond. The scientist needs to identify the species of the parasite in the tissue of the host. Which instrument would best help the scientist identify the parasite?

microscope

Solar cookers use sunlight to cook food. An engineer wants to build a solar cooker that will cook faster than those that are currently available. After building the prototype, which step should the engineer perform next?

research features of current solar cookers

collect data on how well the new cooker heats food

analyze different ways to solve the problem

make a list of materials needed for the new design

collect data on how well the new cooker heats food

Scientist's developed a new pesticide to protect food crops from rodents. Which is the most likely unintended negative consequence of spraying the new pesticide on crops?

changes to the water cycle patterns
increased crop production
increased safety when crops are consumed
changes to the flow of energy through the food web

changes to the flow of energy through the food web

A student is designing and building a solar oven for a school project. The project requires the solar oven to reach at least 90°c inside, using only energy from the sun. How and with what instrument should the student use to test the prototype.

place a thermometer in the oven and measure the temperature

Students set up an experiment to investigate how temperature differences in water create currents. The students fill three identical tanks with the same amount of 20°c water. They put identical heaters in each tank. In the first tank, the heater is set to 20°c. in the second tank, the heater is set to 30°c. in the third tank, the heater is set to 40°c. The student then places drops of dye in the tanks to observe the water movement. What is the dependent variable in the experiment?

the water movement in the tank

Which of these is not considered a consumer in an ecosystem?

a deer eating berries
a vulture eating a dead animal

a plant producing flowers
a mushroom growing on a dead log

a plant producing flowers

Some elements in a coniferous forest include snow, trees, deer, and birds. Which is an abiotic element in this biome?

snow

How does the quoll receive energy directly?

from the hopping mouse and the honeyeater

Describe how the honeyeater indirectly receives energy from the sun.

The wisteria transforms light enrgy into chemical energy and stores it. The honeyeater consumes the wisteria's extra chemical energy.

Rain washes a pesticide into a river. How would the pesticide most likely end up in the tissues of a fish-eating osprey, which does not drink river water?

The osprey would consume organisms that had ingested contaminants.

One year is the length of time it takes for

earth to revolve around the sun once.

Which body is an asteroid?

Z

When viewed from earth, when will the illuminated side of venus most likely be the brightest?

when venus is closest to earth
when the magnetic field on venus is the strongest
when volcanoes on venus are most active
when venus has the highest surface temperature

when venus is closest to earth

A lunar cycle occurs approximately once every (give three examples)

28 days, 4 weeks, or 1 month.

Which season begins in the northern hemisphere when earth is at position 3 and what season begins in the southern hemisphere 3 months later?

spring and winter

Which of these is the direct cause of air movement between areas of high and low pressure?

solar energy
geothermal energy
magnetic field of earth
pull of gravity from the moon

solar energy

Movement of ocean currents is mainly caused by

the magnetic field of earth.
temperature differences in the water.
the gravitational pull from the sun.
runoff of fresh water from land.

temperature differences in the water.

Based on these data, what type of weather should the students predict for later in the afternoon?

windy and cloudy or rainy (precipitation)

These data are charecterstic conditions of a

hurricane

How does this data show convection occuring over a 3 hour period?

a warm air mass is rising in the atmosphere

Which pair of materials will conduct electricity?

rubber and gold
copper and aluminum
plastic and glass
brass and wood

copper and aluminum

One fingernail-sized pellet of nuclear fuel has the same amount of energy as nearly 500 kilograms of coal or nearly 400 liters of gasoline. When nuclear fuel is converted to electricity, why is the total power value of the electricity less than that of the nuclear fuel that was used?

Some energy is transferred to the environment as heat.

Which energy transformation must occur for this circuit to produce sound?

chemical to electrical

What energy conversion most likely happens as the acrobat moves from point 1 to point 2?

Potential energy decreases and kinetic energy increases.

Name the form of potential energy for each of the above pictures.

a-chemical

b-gravitational

c-elastic

d-elastic

The mass of which sample was most likely recorded incorrectly and why?

Sample 3 because the other samples are all close to 11 g, while sample 3 is nearly 13 g, which makes it an outlier and lilely recorded incorrectly.