UNIT 1_TEST REVIEW NOS_2024_8th Grade

Krista is conducting an investigation to determine how much water is best for her sunflower plants. She uses five plants and gives each a different amount of water for six weeks. Each week, she measures the height of each plant. She records her findings in the chart. What information should be recorded in the chart?

• The height of each plant every week

• The amount of sun each plant received

• The amount of water each plant received

• The time it took each plant to reach a certain height

Matthew records the temperature outside for one day. - From 10:00 a.m. to 12:00 p.m., the temperature rises 4°C - From 12:00 p.m. to 2:00 p.m., it rises another 3°C. - From 2:00 p.m. to 4:00 p.m., it drops 2°C. Which of the following predictions about how the temperature will change between 4:00 p.m. and 6:00 p.m. is most reasonable?

• The temperature will rise 3°C

• The temperature will drop 4°C

• The temperature will drop 14°C

• The temperature will stay the same

A graph showing the annual expenses for the town of Ashfield is shown. What conclusion can be made from studying this graph?

• Too much money is spent on public works.

• Public services in Ashfield are not important.

• The Fire department gets more funding than the Public Works department.

• Half the budget goes to Public Works and the Police departments.

José has collected information about the colors of the cars that he observes driving down his street for one day. He wants to use a visual aid to show the percentages of each color of car that he observed. What would be the best type of visual aid for José to use?

• a map

• a diagram

• a circle graph

• a bar graph

Marissa wants to know which of four routes that she could possibly take on her walk to school is the fastest. Which of the following is the best way for Marissa to gather information to answer this question?

• She should look on a map to see which route looks shortest.

• She should walk each route herself at a normal pace and time how long each takes.

• She should take a survey of her friends to find out what they think is the fastest route.

• a.     She should have four friends each take one route and observe who arrives at school first.

Jaylan noticed that his guppy fish moved differently in different temperatures. Jaylan created this chart. What is the dependent variable?

• Temperature of the water

• Container of water

• Number of movements

• The number of trials in the experiment.

Using the chart, what evidence supports the claim that the higher the temperature of the water, the greater the number of movements by the guppy?

• At 34°C the guppy moved 70 times, compared to 42 times at 36°C and 40 times at 61°C.

• At 38°C the guppy moved 56 times, compared to 40 times at 61°C and 34 times at 42°C.

• At 42°C the guppy moved 34 times, compared to 36 times at 46°C and 70 times at 42°C.

• At 34°C the guppy moved 42 times, compared to 56 times at 38°C and 70 times at 42°C.

Fertilizer is a chemical added to the soil to help increase plant growth. Jenny conducted an experiment testing three different types of fertilizers on pea plants. She obtained the following results: What is the independent (test) variable in this experiment?

• The type of fertilizer

• The growth of the pea plants

• The number of weeks the experiment lasted

• The number of trials in the experiment

Samuel has hypothesized that opposing players should call tails in a coin toss. He believes that the head side of the coin has more material and will drop towards the ground first. Which of the following lab scenarios show the proper setup for an experiment that includes a valid independent and dependent variable?

• Samuel will use 5 coins (penny, dime, nickel, quarter, and dollar) as his independent variable, the dependent variable will be how many times each lands with the tail side up.

• Samuel will use 5 coins (penny, dime, nickel, quarter, and dollar) as his dependent variable, the independent variable will be how many times each lands with the tail side up.

• Samuel will use 5 quarters as his independent variable, the dependent variable will be how many times each lands with the tail side up.

• Samuel will use 5 quarters as his dependent variable, the independent variable will be how many times each lands with the tail side up.

Miranda tested five brands of bubble gum to determine with which brand she could blow the biggest bubbles. After testing each brand, she asked three friends to also do the tests to see if they got the same results. Asking her friends to help is an example of which of the following?

• Repeated Trials

• Prediction

• Conclusion

• Replication