Question

Frank is doing an experiment to find out how the amount of oxygen dissolved in water affects the growth of algae in a body of water. He dissolves different amounts of oxygen in ten otherwise identical samples of water.

What should Frank do next?
A.
Carefully bring each SAMPLE of water to a boil, and measure the temperature at which each boils.

B.
Add equal amounts of algae to each sample of water, and measure the rates at which they grow.

C.
Add a pair of minnows to each sample of water, and measure the rate at which they reproduce.

D.
Place each sample of water i

Answer 1

I think B. but i'm not too sure with this one. Sorry! ♥

Answer 2

Jordan wants to conduct an experiment to see if plant food makes a difference in how well plants grow. He gets 10 pots and plants a different type of seed in each. He gives plant food to half of the plants and does not give plant food to the rest. He records the amount of plant food given to the plants. But, he decides not to write down the types of seeds he planted.

Will someone else be able to repeat the experiment and find reliable results?
A.
No, the results would not be reliable since not all of the plants were given plant food.

B.
Yes, because the type of seed is not important. As long as some of the plants are receiving plant food and some are not, the experiment will give the same results.

C.
No, because Jordan should have used the same type of seeds in each pot, and should have recorded the type of seeds.

D.
No, because Jordan would need to use all vegetable seeds for the experiment to be reliable.

Answer 3

I would say C.
I don't think he would HAVE to use all the same seeds but he did need to record them at least.
♥

Answer 4

do you have skyp

Answer 5

Ya, but I don't use it.

Answer 6

can i have or skyp

Answer 7

we can talk on mic

Answer 8

I don't use my skype.
I deleted it from my device then I forgot my password. xP

Answer 9

ok

Answer 10

Drag each tile to the correct box.
When performing scientific investigations, scientists often use different approaches. For example, one scientist might add an extra step to his or her investigation that another scientist's investigation does not need. In other cases, certain steps might be repeated or arranged in a different order.
Even with all the different ways scientists can approach a problem, there are some basic steps that usually occur in the same order. For a single scientific investigation, which of the following shows steps in the most appropriate order?
draw conclusions
question
hypothesis
gather
experimental data
→ → →

Answer 11

The proper order would be...
Question
Hypothesis
Experiment
Gather
Draw Conclusion
♥

Answer 12

Why is it important that a scientist keep accurate records of an experiment he conducts?
A.
in order to back up the conclusions he publishes as a result of the experiment
B.
in order to reminisce over all his experiments after he retires
C.
in order to keep an accurate record of how many hours he spent in the lab
D.
in order to receive a patent for any new product that he invents

Answer 13

A. ♥

Answer 14

Drag each label to the correct location on the chart. Not all labels will be used.
Liam wants to design an experiment to test the effect of salt on plant growth. He writes the following hypothesis: Increasing the amount of salt in the soil that geraniums are grown in will cause a reduction in their growth rate.
Based on Liam's hypothesis, complete the chart below by determining the independent and dependent variables that he should use in his experiment.

Answer 15

Select each correct answer. More than one answer may be correct.
Which of these correctly describes a scientific experiment?
a structured test of a hypothesis
a generalization used to summarize a trend
a possible explanation for a set of observations
a statement that suggests a possible outcome to an event
a piece of information gathered by one of the five senses

Answer 16

i say b and d

Answer 17

I have to go. Sorry! x(
Try asking in the Science area. ♥
It says there may be more than one answer and there still might be but the only one that seems correct to me seems to be A. ♥
A = Experiment
B = A hypothesis (I think)
C = Also a Hypothesis
D = Still seems like a Hypothesis
E = Observation