Scientific Tools, Inquiry, and Investigation

A student conducted an experiment on the length of time it took students to open their lockers. Which statements are true about this experiment?

• Student 2's mean time is the highest

• A different trial for the experiment was repeated for each student 5 times.

• Two students have the same mean time.

• Students 5 and 4 have a lower mean than Student 3.

In which water temperature did the goldfish have an average breathing rate of 28.75?

• 2 degrees C

• 14 degrees C

• 8 degrees C

• 20 degrees C

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NGSS.MS-PS3-4

When measuring the mass of a baby mouse, what metric unit should be used?

• Degrees Celsius

• Milliliter

• Gram

• Kilometer

The above figure is a type of model used to demonstrate —

• a relationship between organisms

• a scientific experiment

• an organizational chart

• a conceptual graph

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NGSS.MS-LS2-1

NGSS.MS-LS1-5

NGSS.MS-LS2-3

The above picture is a solar system —

• simulation

• phenomena

• model

• graph

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NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

Isaac's family went on a trip to Africa and visited the Plains and Acacia Savannahs for five straight days. Isaac decided to keep a count of the total number of Wildebeest he saw each day and created the chart above. What is missing from his chart?

• The chart needs to have an appropriate title.

• The X-axis needs to be labeled with the days he visited the area.

• The chart needs to indicate how many wildebeests are represented in one wildebeest picture.

• The chart needs to have the actual location where the wildebeest were counted.

A fish breeder observes that brown trout fish will consume fly larvae in the wild. The breeder wants to determine the percentage of larvae in the wild brown trout's diet. In a small stream near his home, the fish breeder catches 22 brown trout and examines their stomach contents. Based on this data, the breeder determines that 50% of the wild brown trout's diet in North America consists of fly larvae. Why might his conclusion NOT be valid?

• The sample size was too small an only from one location.

• The stomachs of the other breeds of fish were not examined.

• The age of the fish should have been determined as well.

• The breeder could conclude that fly larvae are easy for the fish to catch.

John and Emily were experimenting with the effects of road salt on plant growth. To do this, they watered plants daily with the same amount of salt water. They could best improve their experiment by—

• watering half the plants with pure water and half with salt water

• cooling the salt water before watering the plants

• adding food color to see how far the salt penetrates the plants

• increasing the amount of salt added to the water each day

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

NGSS.MS-LS2-4

James is conducting an experiment to test the effect of insecticides on frogs. What is the control group in his experiment?

• The frogs that were exposed to 15 ml of insecticide.

• The frogs that were exposed to 30 ml of insecticide.

• The frogs that were not exposed to the insecticides.

• The frogs that did not survive the experiment.

What is an appropriate hypothesis for the above experiment?

• If a snake is placed in an environment with a heated and room temperature rock, then the snake will lay on the heated rock.

• If a snake is placed in an environment with glass and wire, then the snake will live in the area surrounded by wire.

• If a snake is placed in an environment with another snake, then the two snakes will mate.

• If a snake is placed in an environment with dead and living prey, then the snake will eat the living prey.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

NGSS.MS-LS2-4