Question

1. the final step of the scientific method is:

a. do background research
b. communicate the results of your experiment
c. ask a question
d. construct a hypothesis

1. what is a hypothesis?

a. the thing changed on purpose in the experiment
b. an explanation about what you observed
c. an educated guess about the outcome of an experiment
d. all the above

1. a good hypothesis allows you to make a testable prediction. which of the following is an example of a good, testable prediction?

a. what will happen if i mix baking soda and vinegar?
b. if i add salt to ice cubes, they will melt faster.
c. july is the seventh month of the year.
d. where does snow come from?

1. why should i repeat an experiment over and over again?

a. because scientists are supposed to do experiments
b. to test your results and conclude that you will get the same results every time.
c. to test a new variable
d. it’s not necessary, but it’s recommended

1. ms. edwards has been reading about another scientist’s research in a chemistry journal. she plans to do these experiments herself and see if she gets the same result.

a. repetition b. replication

1. a student is trying to find out which type of fertilizer is best for getting a plant to grow as tall as possible. she keeps all the plants indoors on the same classroom window sill. what is the independent variable (iv) in this experiment?

a. the height of the plants
b. the type of fertilizer used on each plant
c. the amount of sunlight coming through the window
d. the kind of plant used

1. a student is trying to find out which type of fertilizer is best for getting a plant to grow as tall as possible. she keeps all the plants indoors on the same classroom window sill. what is the dependent variable (dv) in this experiment?

a. the number of plants tested
b. the type of soil in the pots
c. how tall each plant grows
d. the place where the plants are kept

Explanation:

Question 7

The scientific method steps are: ask a question, background research, construct hypothesis, test, analyze, conclude, communicate. The final step is communicating results. Option B says "Communicate the results of your experiment" (assuming typo "Communicate" instead of "Communicate"). A is background, C is first step, D is early step. So B is correct.

A hypothesis is an educated guess about an experiment's outcome. A is the independent variable, B is an observation explanation (maybe inference), C matches the definition. D is wrong as A and B don't fit. So C is correct.

A testable prediction is a statement that can be verified. A and D are questions, C is a fact. B ("If I add salt to ice cubes, they will melt faster") is a testable prediction. So B is correct.

Answer:

B. Communicate the results of your experiment

Question 8