Chemistry, 06.10.2019 05:20 andrewjewell2005
Each sentence below describes a step of the scientific method. match each sentence with a step of the scientific method listed below.
a. recognize a problem b. form a hypothesis c. test the hypothesis with an experiment d. draw conclusions
1 stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted.
2 susan said, “if i fertilize my geranium plants, they will blossom.”
3 jonathan’s data showed that household cockroaches moved away from raw cucumber slices.
4 rene grew bacteria from the mouth on special plates in the laboratory. she placed drops of different mouthwashes on bacteria on each plate.
5 kathy used a survey to determine how many of her classmates were left-handed and how many were right-handed.
6 jose saw bats catching insects after dark. he asked, “how do bats find the insects in the dark? ”
7 justin wondered if dyes could be taken out of plant leaves, flowers, and stems. 8 kevin said, “if i grow five seedlings in red light, i think the plants will grow faster than the five plants grown in white light.”
Answers: 1
Chemistry, 22.06.2019 10:40
Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3
Answers: 1
Chemistry, 22.06.2019 20:30
The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?
Answers: 3
Chemistry, 22.06.2019 23:30
Why do oxygen have a strong attractive force for electrons
Answers: 2
Each sentence below describes a step of the scientific method. match each sentence with a step of th...
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